./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/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_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/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_2539b266-d4bc-4841-8fb7-51e667ac3aea/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 0451b84ecb7a9b49daa0d007f78b5b7787a8fa890fb4c838a3b9a1c5be28a03a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:22:38,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:22:38,355 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:22:38,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:22:38,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:22:38,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:22:38,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:22:38,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:22:38,384 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:22:38,385 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:22:38,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:22:38,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:22:38,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:22:38,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:22:38,388 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:22:38,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:22:38,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:22:38,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:22:38,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:22:38,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:22:38,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:22:38,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:22:38,394 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:22:38,394 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:22:38,394 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:22:38,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:22:38,395 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:22:38,395 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:22:38,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:22:38,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:22:38,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:22:38,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:22:38,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:22:38,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:22:38,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:22:38,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:22:38,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:22:38,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:22:38,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:22:38,400 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:22:38,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:22:38,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:22:38,400 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_2539b266-d4bc-4841-8fb7-51e667ac3aea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0451b84ecb7a9b49daa0d007f78b5b7787a8fa890fb4c838a3b9a1c5be28a03a [2023-11-29 03:22:38,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:22:38,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:22:38,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:22:38,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:22:38,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:22:38,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-29 03:22:41,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:22:41,608 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:22:41,609 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-29 03:22:41,620 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/data/297a25644/3efcbd73032e4ee48e0551cbbd2e53b3/FLAG6d412ea00 [2023-11-29 03:22:41,635 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/data/297a25644/3efcbd73032e4ee48e0551cbbd2e53b3 [2023-11-29 03:22:41,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:22:41,640 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:22:41,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:22:41,641 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:22:41,647 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:22:41,648 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:41,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b19d52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41, skipping insertion in model container [2023-11-29 03:22:41,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:41,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:22:41,889 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_2539b266-d4bc-4841-8fb7-51e667ac3aea/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-11-29 03:22:41,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:22:41,922 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:22:41,959 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_2539b266-d4bc-4841-8fb7-51e667ac3aea/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-11-29 03:22:41,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:22:41,992 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:22:41,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41 WrapperNode [2023-11-29 03:22:41,992 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:22:41,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:22:41,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:22:41,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:22:41,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,007 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,042 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 342 [2023-11-29 03:22:42,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:22:42,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:22:42,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:22:42,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:22:42,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,059 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,072 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 03:22:42,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:22:42,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:22:42,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:22:42,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:22:42,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (1/1) ... [2023-11-29 03:22:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:22:42,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:22:42,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:22:42,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:22:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:22:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:22:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:22:42,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:22:42,300 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:22:42,302 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:22:42,652 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:22:42,689 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:22:42,689 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 03:22:42,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:22:42 BoogieIcfgContainer [2023-11-29 03:22:42,690 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:22:42,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:22:42,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:22:42,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:22:42,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:22:41" (1/3) ... [2023-11-29 03:22:42,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3175fa11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:22:42, skipping insertion in model container [2023-11-29 03:22:42,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:22:41" (2/3) ... [2023-11-29 03:22:42,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3175fa11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:22:42, skipping insertion in model container [2023-11-29 03:22:42,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:22:42" (3/3) ... [2023-11-29 03:22:42,699 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-29 03:22:42,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:22:42,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:22:42,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:22:42,769 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;@69924b10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:22:42,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:22:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 79 states have internal predecessors, (132), 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 03:22:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 03:22:42,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:42,781 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] [2023-11-29 03:22:42,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:42,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:42,787 INFO L85 PathProgramCache]: Analyzing trace with hash -544712237, now seen corresponding path program 1 times [2023-11-29 03:22:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:42,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393754988] [2023-11-29 03:22:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:43,074 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 03:22:43,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:43,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393754988] [2023-11-29 03:22:43,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393754988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:43,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:43,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:43,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002122925] [2023-11-29 03:22:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:43,114 INFO L87 Difference]: Start difference. First operand has 80 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 79 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 03:22:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:43,165 INFO L93 Difference]: Finished difference Result 186 states and 296 transitions. [2023-11-29 03:22:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2023-11-29 03:22:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:43,177 INFO L225 Difference]: With dead ends: 186 [2023-11-29 03:22:43,178 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 03:22:43,180 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 03:22:43,184 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 86 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 259 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 03:22:43,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 259 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 03:22:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2023-11-29 03:22:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5) internal successors, (177), 118 states have internal predecessors, (177), 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 03:22:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 177 transitions. [2023-11-29 03:22:43,223 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 177 transitions. Word has length 36 [2023-11-29 03:22:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:43,224 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 177 transitions. [2023-11-29 03:22:43,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 03:22:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 177 transitions. [2023-11-29 03:22:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 03:22:43,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:43,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:22:43,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:22:43,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:43,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1387798961, now seen corresponding path program 1 times [2023-11-29 03:22:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:43,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57479825] [2023-11-29 03:22:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:43,343 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 03:22:43,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:43,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57479825] [2023-11-29 03:22:43,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57479825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:43,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:43,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:43,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467823362] [2023-11-29 03:22:43,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:43,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:43,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:43,348 INFO L87 Difference]: Start difference. First operand 119 states and 177 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:22:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:43,378 INFO L93 Difference]: Finished difference Result 287 states and 441 transitions. [2023-11-29 03:22:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 03:22:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:43,381 INFO L225 Difference]: With dead ends: 287 [2023-11-29 03:22:43,381 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 03:22:43,382 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 03:22:43,384 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 72 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:43,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 03:22:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2023-11-29 03:22:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.5217391304347827) internal successors, (280), 184 states have internal predecessors, (280), 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 03:22:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 280 transitions. [2023-11-29 03:22:43,401 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 280 transitions. Word has length 37 [2023-11-29 03:22:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:43,401 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 280 transitions. [2023-11-29 03:22:43,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:22:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 280 transitions. [2023-11-29 03:22:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 03:22:43,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:43,404 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 03:22:43,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:22:43,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:43,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash -312459046, now seen corresponding path program 1 times [2023-11-29 03:22:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:43,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406892025] [2023-11-29 03:22:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:43,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:43,562 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 03:22:43,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406892025] [2023-11-29 03:22:43,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406892025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:43,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:43,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:22:43,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930388245] [2023-11-29 03:22:43,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:43,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:43,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:43,565 INFO L87 Difference]: Start difference. First operand 185 states and 280 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 03:22:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:43,662 INFO L93 Difference]: Finished difference Result 849 states and 1324 transitions. [2023-11-29 03:22:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:43,662 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 03:22:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:43,669 INFO L225 Difference]: With dead ends: 849 [2023-11-29 03:22:43,669 INFO L226 Difference]: Without dead ends: 683 [2023-11-29 03:22:43,671 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 03:22:43,672 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 462 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:43,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 618 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-11-29 03:22:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 349. [2023-11-29 03:22:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.528735632183908) internal successors, (532), 348 states have internal predecessors, (532), 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 03:22:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 532 transitions. [2023-11-29 03:22:43,704 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 532 transitions. Word has length 38 [2023-11-29 03:22:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:43,705 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 532 transitions. [2023-11-29 03:22:43,705 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 03:22:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 532 transitions. [2023-11-29 03:22:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 03:22:43,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:43,707 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 03:22:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:22:43,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:43,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1115752148, now seen corresponding path program 1 times [2023-11-29 03:22:43,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:43,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574765156] [2023-11-29 03:22:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:43,841 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 03:22:43,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:43,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574765156] [2023-11-29 03:22:43,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574765156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:43,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:43,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:22:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207218101] [2023-11-29 03:22:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:43,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:43,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:43,844 INFO L87 Difference]: Start difference. First operand 349 states and 532 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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 03:22:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:43,914 INFO L93 Difference]: Finished difference Result 1227 states and 1887 transitions. [2023-11-29 03:22:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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 03:22:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:43,921 INFO L225 Difference]: With dead ends: 1227 [2023-11-29 03:22:43,921 INFO L226 Difference]: Without dead ends: 897 [2023-11-29 03:22:43,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:43,924 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 228 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:43,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 330 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-11-29 03:22:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 893. [2023-11-29 03:22:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.5291479820627802) internal successors, (1364), 892 states have internal predecessors, (1364), 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 03:22:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1364 transitions. [2023-11-29 03:22:43,955 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1364 transitions. Word has length 39 [2023-11-29 03:22:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:43,955 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1364 transitions. [2023-11-29 03:22:43,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 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 03:22:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1364 transitions. [2023-11-29 03:22:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 03:22:43,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:43,960 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 03:22:43,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:22:43,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:43,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -91127901, now seen corresponding path program 1 times [2023-11-29 03:22:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961855002] [2023-11-29 03:22:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:44,054 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 03:22:44,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961855002] [2023-11-29 03:22:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961855002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:44,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:44,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:22:44,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902650984] [2023-11-29 03:22:44,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:44,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:44,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:44,057 INFO L87 Difference]: Start difference. First operand 893 states and 1364 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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 03:22:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:44,204 INFO L93 Difference]: Finished difference Result 2641 states and 4054 transitions. [2023-11-29 03:22:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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 03:22:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:44,216 INFO L225 Difference]: With dead ends: 2641 [2023-11-29 03:22:44,216 INFO L226 Difference]: Without dead ends: 1767 [2023-11-29 03:22:44,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 03:22:44,219 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 472 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:44,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 135 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:22:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2023-11-29 03:22:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1765. [2023-11-29 03:22:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 1.526077097505669) internal successors, (2692), 1764 states have internal predecessors, (2692), 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 03:22:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2692 transitions. [2023-11-29 03:22:44,273 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2692 transitions. Word has length 41 [2023-11-29 03:22:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:44,273 INFO L495 AbstractCegarLoop]: Abstraction has 1765 states and 2692 transitions. [2023-11-29 03:22:44,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 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 03:22:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2692 transitions. [2023-11-29 03:22:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 03:22:44,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:44,275 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 03:22:44,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 03:22:44,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:44,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1535036766, now seen corresponding path program 1 times [2023-11-29 03:22:44,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:44,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132678499] [2023-11-29 03:22:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:44,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:44,490 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 03:22:44,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:44,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132678499] [2023-11-29 03:22:44,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132678499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:44,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:44,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:22:44,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367913752] [2023-11-29 03:22:44,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:44,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:44,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:44,492 INFO L87 Difference]: Start difference. First operand 1765 states and 2692 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 03:22:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:44,559 INFO L93 Difference]: Finished difference Result 3607 states and 5461 transitions. [2023-11-29 03:22:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:22:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 03:22:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:44,580 INFO L225 Difference]: With dead ends: 3607 [2023-11-29 03:22:44,580 INFO L226 Difference]: Without dead ends: 3605 [2023-11-29 03:22:44,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:22:44,583 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 174 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:44,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 562 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2023-11-29 03:22:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 1861. [2023-11-29 03:22:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 1.4989247311827958) internal successors, (2788), 1860 states have internal predecessors, (2788), 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 03:22:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2788 transitions. [2023-11-29 03:22:44,659 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2788 transitions. Word has length 41 [2023-11-29 03:22:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:44,660 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 2788 transitions. [2023-11-29 03:22:44,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 03:22:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2788 transitions. [2023-11-29 03:22:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 03:22:44,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:44,662 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, 1] [2023-11-29 03:22:44,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 03:22:44,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:44,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 352072504, now seen corresponding path program 1 times [2023-11-29 03:22:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794179486] [2023-11-29 03:22:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:44,731 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 03:22:44,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:44,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794179486] [2023-11-29 03:22:44,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794179486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:44,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:44,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:44,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253311643] [2023-11-29 03:22:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:44,734 INFO L87 Difference]: Start difference. First operand 1861 states and 2788 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 03:22:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:44,770 INFO L93 Difference]: Finished difference Result 4961 states and 7384 transitions. [2023-11-29 03:22:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2023-11-29 03:22:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:44,784 INFO L225 Difference]: With dead ends: 4961 [2023-11-29 03:22:44,785 INFO L226 Difference]: Without dead ends: 3119 [2023-11-29 03:22:44,787 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 03:22:44,788 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 61 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:44,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 199 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2023-11-29 03:22:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 3077. [2023-11-29 03:22:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 1.4609882964889467) internal successors, (4494), 3076 states have internal predecessors, (4494), 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 03:22:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 4494 transitions. [2023-11-29 03:22:44,888 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 4494 transitions. Word has length 42 [2023-11-29 03:22:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:44,888 INFO L495 AbstractCegarLoop]: Abstraction has 3077 states and 4494 transitions. [2023-11-29 03:22:44,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 03:22:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 4494 transitions. [2023-11-29 03:22:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 03:22:44,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:44,890 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, 1] [2023-11-29 03:22:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 03:22:44,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:44,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1282227984, now seen corresponding path program 1 times [2023-11-29 03:22:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893375806] [2023-11-29 03:22:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:44,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:44,945 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 03:22:44,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:44,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893375806] [2023-11-29 03:22:44,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893375806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:44,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:44,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237869913] [2023-11-29 03:22:44,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:44,947 INFO L87 Difference]: Start difference. First operand 3077 states and 4494 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 03:22:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:45,002 INFO L93 Difference]: Finished difference Result 6140 states and 9028 transitions. [2023-11-29 03:22:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:45,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2023-11-29 03:22:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:45,026 INFO L225 Difference]: With dead ends: 6140 [2023-11-29 03:22:45,027 INFO L226 Difference]: Without dead ends: 4297 [2023-11-29 03:22:45,030 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 03:22:45,031 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 78 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:45,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 262 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2023-11-29 03:22:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 4295. [2023-11-29 03:22:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 1.4457382394038192) internal successors, (6208), 4294 states have internal predecessors, (6208), 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 03:22:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 6208 transitions. [2023-11-29 03:22:45,158 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 6208 transitions. Word has length 42 [2023-11-29 03:22:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:45,158 INFO L495 AbstractCegarLoop]: Abstraction has 4295 states and 6208 transitions. [2023-11-29 03:22:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 03:22:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 6208 transitions. [2023-11-29 03:22:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 03:22:45,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:45,161 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] [2023-11-29 03:22:45,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 03:22:45,162 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:45,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:45,162 INFO L85 PathProgramCache]: Analyzing trace with hash 957083373, now seen corresponding path program 1 times [2023-11-29 03:22:45,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:45,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937633143] [2023-11-29 03:22:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:45,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:45,282 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 03:22:45,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937633143] [2023-11-29 03:22:45,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937633143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:45,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:45,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:22:45,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880960436] [2023-11-29 03:22:45,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:45,285 INFO L87 Difference]: Start difference. First operand 4295 states and 6208 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 03:22:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:45,396 INFO L93 Difference]: Finished difference Result 7675 states and 11194 transitions. [2023-11-29 03:22:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 60 [2023-11-29 03:22:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:45,434 INFO L225 Difference]: With dead ends: 7675 [2023-11-29 03:22:45,434 INFO L226 Difference]: Without dead ends: 6121 [2023-11-29 03:22:45,438 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 03:22:45,439 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 324 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:45,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 537 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2023-11-29 03:22:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 5571. [2023-11-29 03:22:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5571 states, 5570 states have (on average 1.444883303411131) internal successors, (8048), 5570 states have internal predecessors, (8048), 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 03:22:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5571 states to 5571 states and 8048 transitions. [2023-11-29 03:22:45,595 INFO L78 Accepts]: Start accepts. Automaton has 5571 states and 8048 transitions. Word has length 60 [2023-11-29 03:22:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:45,595 INFO L495 AbstractCegarLoop]: Abstraction has 5571 states and 8048 transitions. [2023-11-29 03:22:45,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 03:22:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5571 states and 8048 transitions. [2023-11-29 03:22:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 03:22:45,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:45,597 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] [2023-11-29 03:22:45,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 03:22:45,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:45,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash -919599404, now seen corresponding path program 1 times [2023-11-29 03:22:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744204816] [2023-11-29 03:22:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:45,650 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 03:22:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744204816] [2023-11-29 03:22:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744204816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:45,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732766388] [2023-11-29 03:22:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:45,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:45,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:45,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:45,653 INFO L87 Difference]: Start difference. First operand 5571 states and 8048 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 03:22:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:45,698 INFO L93 Difference]: Finished difference Result 9014 states and 12954 transitions. [2023-11-29 03:22:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2023-11-29 03:22:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:45,724 INFO L225 Difference]: With dead ends: 9014 [2023-11-29 03:22:45,725 INFO L226 Difference]: Without dead ends: 5861 [2023-11-29 03:22:45,728 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 03:22:45,729 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 62 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:45,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 241 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2023-11-29 03:22:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 5635. [2023-11-29 03:22:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 5634 states have (on average 1.4176428824991125) internal successors, (7987), 5634 states have internal predecessors, (7987), 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 03:22:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 7987 transitions. [2023-11-29 03:22:45,824 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 7987 transitions. Word has length 60 [2023-11-29 03:22:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:45,824 INFO L495 AbstractCegarLoop]: Abstraction has 5635 states and 7987 transitions. [2023-11-29 03:22:45,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 03:22:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 7987 transitions. [2023-11-29 03:22:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 03:22:45,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:45,826 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] [2023-11-29 03:22:45,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 03:22:45,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1832135133, now seen corresponding path program 1 times [2023-11-29 03:22:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85163401] [2023-11-29 03:22:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:45,941 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 03:22:45,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:45,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85163401] [2023-11-29 03:22:45,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85163401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:45,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:45,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:22:45,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653648059] [2023-11-29 03:22:45,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:45,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:45,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:45,944 INFO L87 Difference]: Start difference. First operand 5635 states and 7987 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 03:22:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:46,021 INFO L93 Difference]: Finished difference Result 7818 states and 11178 transitions. [2023-11-29 03:22:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:46,021 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 60 [2023-11-29 03:22:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:46,036 INFO L225 Difference]: With dead ends: 7818 [2023-11-29 03:22:46,037 INFO L226 Difference]: Without dead ends: 7004 [2023-11-29 03:22:46,040 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 03:22:46,040 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 331 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:46,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 499 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2023-11-29 03:22:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 6431. [2023-11-29 03:22:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 1.4194401244167962) internal successors, (9127), 6430 states have internal predecessors, (9127), 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 03:22:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 9127 transitions. [2023-11-29 03:22:46,133 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 9127 transitions. Word has length 60 [2023-11-29 03:22:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:46,133 INFO L495 AbstractCegarLoop]: Abstraction has 6431 states and 9127 transitions. [2023-11-29 03:22:46,133 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 03:22:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 9127 transitions. [2023-11-29 03:22:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 03:22:46,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:46,135 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, 1, 1, 1] [2023-11-29 03:22:46,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 03:22:46,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:46,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1920820192, now seen corresponding path program 1 times [2023-11-29 03:22:46,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:46,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666354482] [2023-11-29 03:22:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:22:46,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:46,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666354482] [2023-11-29 03:22:46,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666354482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:22:46,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587264433] [2023-11-29 03:22:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:46,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:22:46,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:22:46,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:22:46,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:22:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:46,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:22:46,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:22:46,697 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 03:22:46,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:22:46,851 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 03:22:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587264433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:22:46,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:22:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-11-29 03:22:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210480614] [2023-11-29 03:22:46,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:22:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:22:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:22:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:22:46,854 INFO L87 Difference]: Start difference. First operand 6431 states and 9127 transitions. Second operand has 13 states, 13 states have (on average 13.23076923076923) internal successors, (172), 13 states have internal predecessors, (172), 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 03:22:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:51,550 INFO L93 Difference]: Finished difference Result 62407 states and 87294 transitions. [2023-11-29 03:22:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-29 03:22:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.23076923076923) internal successors, (172), 13 states have internal predecessors, (172), 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 61 [2023-11-29 03:22:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:51,636 INFO L225 Difference]: With dead ends: 62407 [2023-11-29 03:22:51,636 INFO L226 Difference]: Without dead ends: 56275 [2023-11-29 03:22:51,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5917 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2322, Invalid=11720, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 03:22:51,657 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 4436 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4436 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:51,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4436 Valid, 2016 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 03:22:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56275 states. [2023-11-29 03:22:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56275 to 23733. [2023-11-29 03:22:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23733 states, 23732 states have (on average 1.3861874262599023) internal successors, (32897), 23732 states have internal predecessors, (32897), 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 03:22:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23733 states to 23733 states and 32897 transitions. [2023-11-29 03:22:52,341 INFO L78 Accepts]: Start accepts. Automaton has 23733 states and 32897 transitions. Word has length 61 [2023-11-29 03:22:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:52,342 INFO L495 AbstractCegarLoop]: Abstraction has 23733 states and 32897 transitions. [2023-11-29 03:22:52,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.23076923076923) internal successors, (172), 13 states have internal predecessors, (172), 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 03:22:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 23733 states and 32897 transitions. [2023-11-29 03:22:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 03:22:52,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:52,346 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 03:22:52,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:22:52,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:22:52,547 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:52,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1136505805, now seen corresponding path program 1 times [2023-11-29 03:22:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:52,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994673821] [2023-11-29 03:22:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:52,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:52,662 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 03:22:52,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994673821] [2023-11-29 03:22:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994673821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059554604] [2023-11-29 03:22:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:52,664 INFO L87 Difference]: Start difference. First operand 23733 states and 32897 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 03:22:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:52,793 INFO L93 Difference]: Finished difference Result 62926 states and 86754 transitions. [2023-11-29 03:22:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:52,794 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 03:22:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:52,926 INFO L225 Difference]: With dead ends: 62926 [2023-11-29 03:22:52,926 INFO L226 Difference]: Without dead ends: 42201 [2023-11-29 03:22:52,952 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 03:22:52,952 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 57 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:52,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42201 states. [2023-11-29 03:22:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42201 to 42150. [2023-11-29 03:22:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42150 states, 42149 states have (on average 1.3608863792735295) internal successors, (57360), 42149 states have internal predecessors, (57360), 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 03:22:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42150 states to 42150 states and 57360 transitions. [2023-11-29 03:22:53,628 INFO L78 Accepts]: Start accepts. Automaton has 42150 states and 57360 transitions. Word has length 62 [2023-11-29 03:22:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:53,628 INFO L495 AbstractCegarLoop]: Abstraction has 42150 states and 57360 transitions. [2023-11-29 03:22:53,629 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 03:22:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 42150 states and 57360 transitions. [2023-11-29 03:22:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 03:22:53,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:53,636 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 03:22:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 03:22:53,637 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:53,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash 618868237, now seen corresponding path program 1 times [2023-11-29 03:22:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758237068] [2023-11-29 03:22:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:53,915 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 03:22:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758237068] [2023-11-29 03:22:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758237068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:22:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035925168] [2023-11-29 03:22:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:53,917 INFO L87 Difference]: Start difference. First operand 42150 states and 57360 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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 03:22:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:54,079 INFO L93 Difference]: Finished difference Result 65759 states and 90223 transitions. [2023-11-29 03:22:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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 63 [2023-11-29 03:22:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:54,137 INFO L225 Difference]: With dead ends: 65759 [2023-11-29 03:22:54,137 INFO L226 Difference]: Without dead ends: 55868 [2023-11-29 03:22:54,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:22:54,156 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 317 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:54,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 552 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55868 states. [2023-11-29 03:22:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55868 to 50962. [2023-11-29 03:22:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 1.3574301917152332) internal successors, (69176), 50961 states have internal predecessors, (69176), 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 03:22:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 69176 transitions. [2023-11-29 03:22:54,892 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 69176 transitions. Word has length 63 [2023-11-29 03:22:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:54,892 INFO L495 AbstractCegarLoop]: Abstraction has 50962 states and 69176 transitions. [2023-11-29 03:22:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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 03:22:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 69176 transitions. [2023-11-29 03:22:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 03:22:54,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:54,898 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, 1] [2023-11-29 03:22:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 03:22:54,898 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:54,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash -23816856, now seen corresponding path program 1 times [2023-11-29 03:22:54,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:54,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276307027] [2023-11-29 03:22:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:54,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:54,958 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 03:22:54,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276307027] [2023-11-29 03:22:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276307027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:54,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:54,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:22:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699509931] [2023-11-29 03:22:54,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:54,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:22:54,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:22:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:22:54,960 INFO L87 Difference]: Start difference. First operand 50962 states and 69176 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 03:22:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:55,294 INFO L93 Difference]: Finished difference Result 107653 states and 145657 transitions. [2023-11-29 03:22:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:22:55,295 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 03:22:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:55,453 INFO L225 Difference]: With dead ends: 107653 [2023-11-29 03:22:55,453 INFO L226 Difference]: Without dead ends: 58836 [2023-11-29 03:22:55,479 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 03:22:55,480 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 59 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:55,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 251 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:22:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58836 states. [2023-11-29 03:22:55,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58836 to 50004. [2023-11-29 03:22:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50004 states, 50003 states have (on average 1.3393996360218388) internal successors, (66974), 50003 states have internal predecessors, (66974), 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 03:22:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50004 states to 50004 states and 66974 transitions. [2023-11-29 03:22:56,047 INFO L78 Accepts]: Start accepts. Automaton has 50004 states and 66974 transitions. Word has length 63 [2023-11-29 03:22:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:56,047 INFO L495 AbstractCegarLoop]: Abstraction has 50004 states and 66974 transitions. [2023-11-29 03:22:56,047 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 03:22:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 50004 states and 66974 transitions. [2023-11-29 03:22:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 03:22:56,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:56,055 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, 1, 1, 1] [2023-11-29 03:22:56,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 03:22:56,055 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:56,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 549942170, now seen corresponding path program 1 times [2023-11-29 03:22:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:56,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652718738] [2023-11-29 03:22:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:22:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652718738] [2023-11-29 03:22:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652718738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:22:56,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:22:56,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:22:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523273672] [2023-11-29 03:22:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:22:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:22:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:22:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:22:56,147 INFO L87 Difference]: Start difference. First operand 50004 states and 66974 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 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 03:22:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:56,677 INFO L93 Difference]: Finished difference Result 116853 states and 156222 transitions. [2023-11-29 03:22:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:22:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 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 65 [2023-11-29 03:22:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:56,746 INFO L225 Difference]: With dead ends: 116853 [2023-11-29 03:22:56,747 INFO L226 Difference]: Without dead ends: 66918 [2023-11-29 03:22:56,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 03:22:56,778 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 428 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:56,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 139 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:22:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66918 states. [2023-11-29 03:22:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66918 to 66334. [2023-11-29 03:22:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66334 states, 66333 states have (on average 1.3238508736224806) internal successors, (87815), 66333 states have internal predecessors, (87815), 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 03:22:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66334 states to 66334 states and 87815 transitions. [2023-11-29 03:22:57,683 INFO L78 Accepts]: Start accepts. Automaton has 66334 states and 87815 transitions. Word has length 65 [2023-11-29 03:22:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:57,683 INFO L495 AbstractCegarLoop]: Abstraction has 66334 states and 87815 transitions. [2023-11-29 03:22:57,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 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 03:22:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 66334 states and 87815 transitions. [2023-11-29 03:22:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 03:22:57,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:57,689 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, 1, 1, 1] [2023-11-29 03:22:57,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 03:22:57,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:57,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1894911169, now seen corresponding path program 1 times [2023-11-29 03:22:57,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:57,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002975072] [2023-11-29 03:22:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:22:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002975072] [2023-11-29 03:22:57,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002975072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:22:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552921938] [2023-11-29 03:22:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:57,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:22:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:22:57,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:22:57,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:22:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:57,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:22:57,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:22:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:22:58,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:22:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:22:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552921938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:22:58,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:22:58,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 03:22:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885869656] [2023-11-29 03:22:58,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:22:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:22:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:22:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:22:58,239 INFO L87 Difference]: Start difference. First operand 66334 states and 87815 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 10 states have internal predecessors, (110), 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 03:22:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:58,942 INFO L93 Difference]: Finished difference Result 151940 states and 201183 transitions. [2023-11-29 03:22:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:22:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 10 states have internal predecessors, (110), 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 65 [2023-11-29 03:22:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:59,066 INFO L225 Difference]: With dead ends: 151940 [2023-11-29 03:22:59,067 INFO L226 Difference]: Without dead ends: 112361 [2023-11-29 03:22:59,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:22:59,105 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1878 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:59,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1878 Valid, 296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:22:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112361 states. [2023-11-29 03:23:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112361 to 67593. [2023-11-29 03:23:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67593 states, 67592 states have (on average 1.3339892294946147) internal successors, (90167), 67592 states have internal predecessors, (90167), 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 03:23:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67593 states to 67593 states and 90167 transitions. [2023-11-29 03:23:00,298 INFO L78 Accepts]: Start accepts. Automaton has 67593 states and 90167 transitions. Word has length 65 [2023-11-29 03:23:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:00,299 INFO L495 AbstractCegarLoop]: Abstraction has 67593 states and 90167 transitions. [2023-11-29 03:23:00,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 10 states have internal predecessors, (110), 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 03:23:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 67593 states and 90167 transitions. [2023-11-29 03:23:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:23:00,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:00,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:00,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:23:00,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:23:00,506 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:00,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:00,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1364153390, now seen corresponding path program 1 times [2023-11-29 03:23:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:00,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22819795] [2023-11-29 03:23:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:00,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:00,552 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 03:23:00,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:00,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22819795] [2023-11-29 03:23:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22819795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:23:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756667686] [2023-11-29 03:23:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:00,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:23:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:23:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:23:00,554 INFO L87 Difference]: Start difference. First operand 67593 states and 90167 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:23:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:00,764 INFO L93 Difference]: Finished difference Result 74861 states and 99259 transitions. [2023-11-29 03:23:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:23:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2023-11-29 03:23:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:00,813 INFO L225 Difference]: With dead ends: 74861 [2023-11-29 03:23:00,813 INFO L226 Difference]: Without dead ends: 48199 [2023-11-29 03:23:00,833 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 03:23:00,833 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 63 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:00,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 271 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:23:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48199 states. [2023-11-29 03:23:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48199 to 48180. [2023-11-29 03:23:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48180 states, 48179 states have (on average 1.3121069345565495) internal successors, (63216), 48179 states have internal predecessors, (63216), 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 03:23:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48180 states to 48180 states and 63216 transitions. [2023-11-29 03:23:01,912 INFO L78 Accepts]: Start accepts. Automaton has 48180 states and 63216 transitions. Word has length 68 [2023-11-29 03:23:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:01,912 INFO L495 AbstractCegarLoop]: Abstraction has 48180 states and 63216 transitions. [2023-11-29 03:23:01,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:23:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 48180 states and 63216 transitions. [2023-11-29 03:23:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:23:01,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:01,918 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, 1, 1, 1, 1] [2023-11-29 03:23:01,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 03:23:01,919 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:01,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1300390239, now seen corresponding path program 1 times [2023-11-29 03:23:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:01,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994973210] [2023-11-29 03:23:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:23:02,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:02,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994973210] [2023-11-29 03:23:02,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994973210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:02,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:02,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:23:02,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795876687] [2023-11-29 03:23:02,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:02,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:23:02,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:23:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:23:02,006 INFO L87 Difference]: Start difference. First operand 48180 states and 63216 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 03:23:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:02,587 INFO L93 Difference]: Finished difference Result 95234 states and 125035 transitions. [2023-11-29 03:23:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:23:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 68 [2023-11-29 03:23:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:02,633 INFO L225 Difference]: With dead ends: 95234 [2023-11-29 03:23:02,633 INFO L226 Difference]: Without dead ends: 54299 [2023-11-29 03:23:02,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 03:23:02,655 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 447 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:02,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 124 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:23:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54299 states. [2023-11-29 03:23:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54299 to 48180. [2023-11-29 03:23:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48180 states, 48179 states have (on average 1.2937794474771165) internal successors, (62333), 48179 states have internal predecessors, (62333), 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 03:23:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48180 states to 48180 states and 62333 transitions. [2023-11-29 03:23:03,350 INFO L78 Accepts]: Start accepts. Automaton has 48180 states and 62333 transitions. Word has length 68 [2023-11-29 03:23:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:03,350 INFO L495 AbstractCegarLoop]: Abstraction has 48180 states and 62333 transitions. [2023-11-29 03:23:03,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 03:23:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 48180 states and 62333 transitions. [2023-11-29 03:23:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:23:03,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:03,356 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, 1, 1, 1, 1] [2023-11-29 03:23:03,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 03:23:03,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:03,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash 225057860, now seen corresponding path program 1 times [2023-11-29 03:23:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:03,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532064075] [2023-11-29 03:23:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:03,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:03,493 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 03:23:03,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532064075] [2023-11-29 03:23:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532064075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:23:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72000602] [2023-11-29 03:23:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:03,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:03,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:03,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:23:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:03,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:23:03,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:03,841 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 03:23:03,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:03,948 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 03:23:03,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72000602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:03,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:23:03,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 03:23:03,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987591353] [2023-11-29 03:23:03,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:03,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:23:03,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:23:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:23:03,951 INFO L87 Difference]: Start difference. First operand 48180 states and 62333 transitions. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 10 states have internal predecessors, (119), 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 03:23:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:04,588 INFO L93 Difference]: Finished difference Result 108066 states and 139202 transitions. [2023-11-29 03:23:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:23:04,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 10 states have internal predecessors, (119), 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 68 [2023-11-29 03:23:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:04,657 INFO L225 Difference]: With dead ends: 108066 [2023-11-29 03:23:04,657 INFO L226 Difference]: Without dead ends: 83870 [2023-11-29 03:23:04,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:23:04,673 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1171 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:04,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 385 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:23:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83870 states. [2023-11-29 03:23:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83870 to 52982. [2023-11-29 03:23:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52982 states, 52981 states have (on average 1.294331930314641) internal successors, (68575), 52981 states have internal predecessors, (68575), 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 03:23:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52982 states to 52982 states and 68575 transitions. [2023-11-29 03:23:05,396 INFO L78 Accepts]: Start accepts. Automaton has 52982 states and 68575 transitions. Word has length 68 [2023-11-29 03:23:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:05,396 INFO L495 AbstractCegarLoop]: Abstraction has 52982 states and 68575 transitions. [2023-11-29 03:23:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 10 states have internal predecessors, (119), 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 03:23:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 52982 states and 68575 transitions. [2023-11-29 03:23:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 03:23:05,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:05,401 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, 1, 1, 1, 1, 1] [2023-11-29 03:23:05,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:23:05,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:05,602 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:05,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:05,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1517615394, now seen corresponding path program 1 times [2023-11-29 03:23:05,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:05,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749891963] [2023-11-29 03:23:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:05,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:05,705 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 03:23:05,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:05,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749891963] [2023-11-29 03:23:05,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749891963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:23:05,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660762627] [2023-11-29 03:23:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:05,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:05,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:05,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:05,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:23:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:05,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:23:05,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:05,998 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 03:23:05,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:06,086 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 03:23:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660762627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:06,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:23:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 03:23:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392694591] [2023-11-29 03:23:06,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:06,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:23:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:23:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:23:06,088 INFO L87 Difference]: Start difference. First operand 52982 states and 68575 transitions. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 10 states have internal predecessors, (117), 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 03:23:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:06,563 INFO L93 Difference]: Finished difference Result 113844 states and 146920 transitions. [2023-11-29 03:23:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:23:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 10 states have internal predecessors, (117), 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 69 [2023-11-29 03:23:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:06,632 INFO L225 Difference]: With dead ends: 113844 [2023-11-29 03:23:06,632 INFO L226 Difference]: Without dead ends: 76165 [2023-11-29 03:23:06,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:23:06,658 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1064 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:06,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 279 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:23:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76165 states. [2023-11-29 03:23:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76165 to 53950. [2023-11-29 03:23:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53950 states, 53949 states have (on average 1.2844353000055608) internal successors, (69294), 53949 states have internal predecessors, (69294), 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 03:23:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53950 states to 53950 states and 69294 transitions. [2023-11-29 03:23:07,513 INFO L78 Accepts]: Start accepts. Automaton has 53950 states and 69294 transitions. Word has length 69 [2023-11-29 03:23:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:07,514 INFO L495 AbstractCegarLoop]: Abstraction has 53950 states and 69294 transitions. [2023-11-29 03:23:07,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 10 states have internal predecessors, (117), 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 03:23:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 53950 states and 69294 transitions. [2023-11-29 03:23:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 03:23:07,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:07,519 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, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:07,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:23:07,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:07,720 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:07,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:07,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2004446986, now seen corresponding path program 1 times [2023-11-29 03:23:07,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:07,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074505465] [2023-11-29 03:23:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:07,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:07,946 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 03:23:07,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:07,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074505465] [2023-11-29 03:23:07,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074505465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:23:07,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363842994] [2023-11-29 03:23:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:07,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:07,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:23:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:08,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:23:08,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:08,482 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 03:23:08,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:08,946 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 03:23:08,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363842994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:08,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:23:08,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 03:23:08,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648461990] [2023-11-29 03:23:08,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:08,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 03:23:08,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:08,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 03:23:08,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:23:08,948 INFO L87 Difference]: Start difference. First operand 53950 states and 69294 transitions. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 18 states have internal predecessors, (151), 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 03:23:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:11,551 INFO L93 Difference]: Finished difference Result 275047 states and 350593 transitions. [2023-11-29 03:23:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 03:23:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 18 states have internal predecessors, (151), 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 70 [2023-11-29 03:23:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:11,796 INFO L225 Difference]: With dead ends: 275047 [2023-11-29 03:23:11,796 INFO L226 Difference]: Without dead ends: 229620 [2023-11-29 03:23:11,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 03:23:11,828 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 1765 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:11,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 2088 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:23:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229620 states. [2023-11-29 03:23:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229620 to 112020. [2023-11-29 03:23:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112020 states, 112019 states have (on average 1.2830234156705558) internal successors, (143723), 112019 states have internal predecessors, (143723), 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 03:23:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112020 states to 112020 states and 143723 transitions. [2023-11-29 03:23:13,930 INFO L78 Accepts]: Start accepts. Automaton has 112020 states and 143723 transitions. Word has length 70 [2023-11-29 03:23:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:13,931 INFO L495 AbstractCegarLoop]: Abstraction has 112020 states and 143723 transitions. [2023-11-29 03:23:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 18 states have internal predecessors, (151), 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 03:23:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 112020 states and 143723 transitions. [2023-11-29 03:23:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 03:23:13,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:13,939 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, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:13,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:23:14,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:14,145 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:14,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1916377881, now seen corresponding path program 1 times [2023-11-29 03:23:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:14,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303907810] [2023-11-29 03:23:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:14,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:14,382 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 03:23:14,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:14,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303907810] [2023-11-29 03:23:14,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303907810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:23:14,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965211393] [2023-11-29 03:23:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:14,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:14,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:23:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:14,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 03:23:14,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:14,863 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 03:23:14,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:15,669 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 03:23:15,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965211393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:15,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:23:15,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2023-11-29 03:23:15,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724785163] [2023-11-29 03:23:15,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 03:23:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 03:23:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-11-29 03:23:15,672 INFO L87 Difference]: Start difference. First operand 112020 states and 143723 transitions. Second operand has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 20 states have internal predecessors, (159), 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 03:23:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:20,087 INFO L93 Difference]: Finished difference Result 583545 states and 742374 transitions. [2023-11-29 03:23:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 03:23:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 20 states have internal predecessors, (159), 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 70 [2023-11-29 03:23:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:20,915 INFO L225 Difference]: With dead ends: 583545 [2023-11-29 03:23:20,915 INFO L226 Difference]: Without dead ends: 539439 [2023-11-29 03:23:20,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1152, Invalid=4104, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 03:23:20,993 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 2415 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2415 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:20,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2415 Valid, 2798 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 03:23:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539439 states. [2023-11-29 03:23:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539439 to 176751. [2023-11-29 03:23:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176751 states, 176750 states have (on average 1.2827496463932107) internal successors, (226726), 176750 states have internal predecessors, (226726), 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 03:23:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176751 states to 176751 states and 226726 transitions. [2023-11-29 03:23:25,338 INFO L78 Accepts]: Start accepts. Automaton has 176751 states and 226726 transitions. Word has length 70 [2023-11-29 03:23:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:25,338 INFO L495 AbstractCegarLoop]: Abstraction has 176751 states and 226726 transitions. [2023-11-29 03:23:25,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 20 states have internal predecessors, (159), 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 03:23:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 176751 states and 226726 transitions. [2023-11-29 03:23:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:23:25,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:25,348 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:25,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:23:25,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:25,554 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:25,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash -286605816, now seen corresponding path program 1 times [2023-11-29 03:23:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:25,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330864389] [2023-11-29 03:23:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:23:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330864389] [2023-11-29 03:23:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330864389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:25,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:23:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331888069] [2023-11-29 03:23:25,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:23:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:23:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:23:25,587 INFO L87 Difference]: Start difference. First operand 176751 states and 226726 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 03:23:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:26,251 INFO L93 Difference]: Finished difference Result 345347 states and 443693 transitions. [2023-11-29 03:23:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:23:26,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 71 [2023-11-29 03:23:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:26,763 INFO L225 Difference]: With dead ends: 345347 [2023-11-29 03:23:26,763 INFO L226 Difference]: Without dead ends: 168700 [2023-11-29 03:23:26,821 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 03:23:26,822 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 66 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:26,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:23:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168700 states. [2023-11-29 03:23:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168700 to 168350. [2023-11-29 03:23:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168350 states, 168349 states have (on average 1.2726716523412673) internal successors, (214253), 168349 states have internal predecessors, (214253), 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 03:23:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168350 states to 168350 states and 214253 transitions. [2023-11-29 03:23:28,871 INFO L78 Accepts]: Start accepts. Automaton has 168350 states and 214253 transitions. Word has length 71 [2023-11-29 03:23:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:28,871 INFO L495 AbstractCegarLoop]: Abstraction has 168350 states and 214253 transitions. [2023-11-29 03:23:28,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 03:23:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 168350 states and 214253 transitions. [2023-11-29 03:23:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:23:28,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:28,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:28,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 03:23:28,882 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:28,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:28,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2072270125, now seen corresponding path program 1 times [2023-11-29 03:23:28,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:28,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653291582] [2023-11-29 03:23:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:28,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:28,952 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 03:23:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653291582] [2023-11-29 03:23:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653291582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:28,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:28,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:23:28,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535606732] [2023-11-29 03:23:28,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:28,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:23:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:23:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:23:28,954 INFO L87 Difference]: Start difference. First operand 168350 states and 214253 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 03:23:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:30,032 INFO L93 Difference]: Finished difference Result 278154 states and 353368 transitions. [2023-11-29 03:23:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:23:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2023-11-29 03:23:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:30,150 INFO L225 Difference]: With dead ends: 278154 [2023-11-29 03:23:30,150 INFO L226 Difference]: Without dead ends: 109908 [2023-11-29 03:23:30,200 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 03:23:30,201 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:30,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 218 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:23:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109908 states. [2023-11-29 03:23:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109908 to 109863. [2023-11-29 03:23:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109863 states, 109862 states have (on average 1.2466913036354699) internal successors, (136964), 109862 states have internal predecessors, (136964), 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 03:23:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109863 states to 109863 states and 136964 transitions. [2023-11-29 03:23:31,512 INFO L78 Accepts]: Start accepts. Automaton has 109863 states and 136964 transitions. Word has length 71 [2023-11-29 03:23:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:31,513 INFO L495 AbstractCegarLoop]: Abstraction has 109863 states and 136964 transitions. [2023-11-29 03:23:31,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 03:23:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 109863 states and 136964 transitions. [2023-11-29 03:23:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:23:31,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:31,518 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 03:23:31,518 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:31,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:31,518 INFO L85 PathProgramCache]: Analyzing trace with hash -977180283, now seen corresponding path program 1 times [2023-11-29 03:23:31,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:31,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291407897] [2023-11-29 03:23:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:31,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:31,564 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 03:23:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291407897] [2023-11-29 03:23:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291407897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:31,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:23:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880548638] [2023-11-29 03:23:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:31,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:23:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:23:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:23:31,566 INFO L87 Difference]: Start difference. First operand 109863 states and 136964 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 03:23:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:32,220 INFO L93 Difference]: Finished difference Result 138797 states and 173101 transitions. [2023-11-29 03:23:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:23:32,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2023-11-29 03:23:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:32,328 INFO L225 Difference]: With dead ends: 138797 [2023-11-29 03:23:32,328 INFO L226 Difference]: Without dead ends: 101938 [2023-11-29 03:23:32,345 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 03:23:32,345 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:32,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 223 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:23:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101938 states. [2023-11-29 03:23:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101938 to 101936. [2023-11-29 03:23:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101936 states, 101935 states have (on average 1.2314317947711777) internal successors, (125526), 101935 states have internal predecessors, (125526), 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 03:23:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101936 states to 101936 states and 125526 transitions. [2023-11-29 03:23:33,677 INFO L78 Accepts]: Start accepts. Automaton has 101936 states and 125526 transitions. Word has length 71 [2023-11-29 03:23:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:33,677 INFO L495 AbstractCegarLoop]: Abstraction has 101936 states and 125526 transitions. [2023-11-29 03:23:33,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 03:23:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 101936 states and 125526 transitions. [2023-11-29 03:23:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:23:33,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:33,684 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:33,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 03:23:33,685 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:33,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1089819791, now seen corresponding path program 1 times [2023-11-29 03:23:33,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:33,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150301191] [2023-11-29 03:23:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:33,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:23:33,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150301191] [2023-11-29 03:23:33,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150301191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:33,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:23:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354463626] [2023-11-29 03:23:33,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:33,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:23:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:23:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:23:33,726 INFO L87 Difference]: Start difference. First operand 101936 states and 125526 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:23:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:34,362 INFO L93 Difference]: Finished difference Result 190467 states and 234917 transitions. [2023-11-29 03:23:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:23:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 71 [2023-11-29 03:23:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:34,461 INFO L225 Difference]: With dead ends: 190467 [2023-11-29 03:23:34,461 INFO L226 Difference]: Without dead ends: 89122 [2023-11-29 03:23:34,511 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 03:23:34,511 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 70 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:34,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:23:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89122 states. [2023-11-29 03:23:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89122 to 87140. [2023-11-29 03:23:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87140 states, 87139 states have (on average 1.2128438471866787) internal successors, (105686), 87139 states have internal predecessors, (105686), 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 03:23:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87140 states to 87140 states and 105686 transitions. [2023-11-29 03:23:35,969 INFO L78 Accepts]: Start accepts. Automaton has 87140 states and 105686 transitions. Word has length 71 [2023-11-29 03:23:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:35,970 INFO L495 AbstractCegarLoop]: Abstraction has 87140 states and 105686 transitions. [2023-11-29 03:23:35,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 03:23:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 87140 states and 105686 transitions. [2023-11-29 03:23:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 03:23:35,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:35,974 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:35,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 03:23:35,975 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:35,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1711114161, now seen corresponding path program 1 times [2023-11-29 03:23:35,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:35,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754824916] [2023-11-29 03:23:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:23:36,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:36,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754824916] [2023-11-29 03:23:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754824916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:23:36,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:23:36,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:23:36,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801059952] [2023-11-29 03:23:36,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:23:36,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:23:36,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:36,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:23:36,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:23:36,007 INFO L87 Difference]: Start difference. First operand 87140 states and 105686 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 03:23:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:36,315 INFO L93 Difference]: Finished difference Result 150297 states and 182790 transitions. [2023-11-29 03:23:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:23:36,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 71 [2023-11-29 03:23:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:36,384 INFO L225 Difference]: With dead ends: 150297 [2023-11-29 03:23:36,384 INFO L226 Difference]: Without dead ends: 71263 [2023-11-29 03:23:36,414 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 03:23:36,414 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 76 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:36,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 123 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:23:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71263 states. [2023-11-29 03:23:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71263 to 71263. [2023-11-29 03:23:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71263 states, 71262 states have (on average 1.2024080154921277) internal successors, (85686), 71262 states have internal predecessors, (85686), 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 03:23:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71263 states to 71263 states and 85686 transitions. [2023-11-29 03:23:37,274 INFO L78 Accepts]: Start accepts. Automaton has 71263 states and 85686 transitions. Word has length 71 [2023-11-29 03:23:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:37,274 INFO L495 AbstractCegarLoop]: Abstraction has 71263 states and 85686 transitions. [2023-11-29 03:23:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 03:23:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 71263 states and 85686 transitions. [2023-11-29 03:23:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 03:23:37,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:37,277 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:37,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 03:23:37,277 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:37,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1800747589, now seen corresponding path program 1 times [2023-11-29 03:23:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464936532] [2023-11-29 03:23:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:38,608 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 03:23:38,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:38,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464936532] [2023-11-29 03:23:38,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464936532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:23:38,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781762272] [2023-11-29 03:23:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:38,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:38,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:38,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:23:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:38,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 03:23:38,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:41,342 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 03:23:41,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:43,844 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 03:23:43,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781762272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:43,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:23:43,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 59 [2023-11-29 03:23:43,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228329600] [2023-11-29 03:23:43,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:43,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 03:23:43,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 03:23:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=3072, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 03:23:43,847 INFO L87 Difference]: Start difference. First operand 71263 states and 85686 transitions. Second operand has 59 states, 59 states have (on average 3.440677966101695) internal successors, (203), 59 states have internal predecessors, (203), 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 03:25:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:25:05,676 INFO L93 Difference]: Finished difference Result 256915 states and 306382 transitions. [2023-11-29 03:25:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 502 states. [2023-11-29 03:25:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.440677966101695) internal successors, (203), 59 states have internal predecessors, (203), 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 72 [2023-11-29 03:25:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:25:05,861 INFO L225 Difference]: With dead ends: 256915 [2023-11-29 03:25:05,861 INFO L226 Difference]: Without dead ends: 196434 [2023-11-29 03:25:05,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133439 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=31819, Invalid=262487, Unknown=0, NotChecked=0, Total=294306 [2023-11-29 03:25:05,934 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 9652 mSDsluCounter, 23011 mSDsCounter, 0 mSdLazyCounter, 15133 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9652 SdHoareTripleChecker+Valid, 23751 SdHoareTripleChecker+Invalid, 15305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 15133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:25:05,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9652 Valid, 23751 Invalid, 15305 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [172 Valid, 15133 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2023-11-29 03:25:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196434 states. [2023-11-29 03:25:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196434 to 76515. [2023-11-29 03:25:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76515 states, 76514 states have (on average 1.202224429516167) internal successors, (91987), 76514 states have internal predecessors, (91987), 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 03:25:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76515 states to 76515 states and 91987 transitions. [2023-11-29 03:25:07,385 INFO L78 Accepts]: Start accepts. Automaton has 76515 states and 91987 transitions. Word has length 72 [2023-11-29 03:25:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:25:07,385 INFO L495 AbstractCegarLoop]: Abstraction has 76515 states and 91987 transitions. [2023-11-29 03:25:07,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.440677966101695) internal successors, (203), 59 states have internal predecessors, (203), 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 03:25:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 76515 states and 91987 transitions. [2023-11-29 03:25:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 03:25:07,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:25:07,394 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:07,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:25:07,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 03:25:07,595 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:25:07,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1009994868, now seen corresponding path program 1 times [2023-11-29 03:25:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:07,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083123314] [2023-11-29 03:25:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:25:07,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:07,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083123314] [2023-11-29 03:25:07,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083123314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:25:07,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:25:07,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:25:07,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837222869] [2023-11-29 03:25:07,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:25:07,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:25:07,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:25:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:25:07,678 INFO L87 Difference]: Start difference. First operand 76515 states and 91987 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 03:25:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:25:08,052 INFO L93 Difference]: Finished difference Result 116242 states and 139128 transitions. [2023-11-29 03:25:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:25:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 117 [2023-11-29 03:25:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:25:08,157 INFO L225 Difference]: With dead ends: 116242 [2023-11-29 03:25:08,158 INFO L226 Difference]: Without dead ends: 96593 [2023-11-29 03:25:08,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:25:08,180 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 115 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:25:08,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 319 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:25:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96593 states. [2023-11-29 03:25:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96593 to 67487. [2023-11-29 03:25:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67487 states, 67486 states have (on average 1.199893311205287) internal successors, (80976), 67486 states have internal predecessors, (80976), 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 03:25:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67487 states to 67487 states and 80976 transitions. [2023-11-29 03:25:09,440 INFO L78 Accepts]: Start accepts. Automaton has 67487 states and 80976 transitions. Word has length 117 [2023-11-29 03:25:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:25:09,440 INFO L495 AbstractCegarLoop]: Abstraction has 67487 states and 80976 transitions. [2023-11-29 03:25:09,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 03:25:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 67487 states and 80976 transitions. [2023-11-29 03:25:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 03:25:09,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:25:09,449 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:09,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 03:25:09,449 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:25:09,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1463322855, now seen corresponding path program 1 times [2023-11-29 03:25:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:09,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019656570] [2023-11-29 03:25:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:10,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019656570] [2023-11-29 03:25:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019656570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:25:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805287164] [2023-11-29 03:25:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:10,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:10,255 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:10,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:25:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:10,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 03:25:10,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:11,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:25:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 39 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805287164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:25:12,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:25:12,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 35 [2023-11-29 03:25:12,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847273915] [2023-11-29 03:25:12,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:25:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 03:25:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 03:25:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:25:12,087 INFO L87 Difference]: Start difference. First operand 67487 states and 80976 transitions. Second operand has 35 states, 35 states have (on average 9.371428571428572) internal successors, (328), 35 states have internal predecessors, (328), 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 03:26:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:26:05,443 INFO L93 Difference]: Finished difference Result 180422 states and 213108 transitions. [2023-11-29 03:26:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 391 states. [2023-11-29 03:26:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 9.371428571428572) internal successors, (328), 35 states have internal predecessors, (328), 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 117 [2023-11-29 03:26:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:26:05,580 INFO L225 Difference]: With dead ends: 180422 [2023-11-29 03:26:05,581 INFO L226 Difference]: Without dead ends: 164705 [2023-11-29 03:26:05,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78134 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=20175, Invalid=159177, Unknown=0, NotChecked=0, Total=179352 [2023-11-29 03:26:05,617 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 14712 mSDsluCounter, 8632 mSDsCounter, 0 mSdLazyCounter, 9019 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14712 SdHoareTripleChecker+Valid, 9033 SdHoareTripleChecker+Invalid, 9210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 9019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:26:05,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14712 Valid, 9033 Invalid, 9210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [191 Valid, 9019 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-11-29 03:26:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164705 states. [2023-11-29 03:26:06,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164705 to 70964. [2023-11-29 03:26:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70964 states, 70963 states have (on average 1.1965390414723165) internal successors, (84910), 70963 states have internal predecessors, (84910), 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 03:26:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70964 states to 70964 states and 84910 transitions. [2023-11-29 03:26:06,699 INFO L78 Accepts]: Start accepts. Automaton has 70964 states and 84910 transitions. Word has length 117 [2023-11-29 03:26:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:26:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 70964 states and 84910 transitions. [2023-11-29 03:26:06,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.371428571428572) internal successors, (328), 35 states have internal predecessors, (328), 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 03:26:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 70964 states and 84910 transitions. [2023-11-29 03:26:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 03:26:06,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:26:06,706 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:26:06,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:26:06,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 03:26:06,907 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:26:06,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:26:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 417373954, now seen corresponding path program 1 times [2023-11-29 03:26:06,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:26:06,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287351991] [2023-11-29 03:26:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:26:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:26:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:26:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287351991] [2023-11-29 03:26:07,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287351991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:26:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972918065] [2023-11-29 03:26:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:26:07,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:26:07,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:26:07,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:26:07,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:26:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:26:07,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 03:26:07,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:26:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:26:08,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:26:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:26:09,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972918065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:26:09,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:26:09,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2023-11-29 03:26:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824636330] [2023-11-29 03:26:09,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:26:09,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 03:26:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:26:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 03:26:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:26:09,173 INFO L87 Difference]: Start difference. First operand 70964 states and 84910 transitions. Second operand has 34 states, 34 states have (on average 9.235294117647058) internal successors, (314), 34 states have internal predecessors, (314), 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 03:27:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:27:00,520 INFO L93 Difference]: Finished difference Result 259419 states and 308038 transitions. [2023-11-29 03:27:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2023-11-29 03:27:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 9.235294117647058) internal successors, (314), 34 states have internal predecessors, (314), 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 117 [2023-11-29 03:27:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:27:00,762 INFO L225 Difference]: With dead ends: 259419 [2023-11-29 03:27:00,762 INFO L226 Difference]: Without dead ends: 234872 [2023-11-29 03:27:00,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139179 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=30270, Invalid=269486, Unknown=0, NotChecked=0, Total=299756 [2023-11-29 03:27:00,812 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 14436 mSDsluCounter, 9957 mSDsCounter, 0 mSdLazyCounter, 8684 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14436 SdHoareTripleChecker+Valid, 10397 SdHoareTripleChecker+Invalid, 8868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 8684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:27:00,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14436 Valid, 10397 Invalid, 8868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [184 Valid, 8684 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-29 03:27:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234872 states. [2023-11-29 03:27:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234872 to 80130. [2023-11-29 03:27:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80130 states, 80129 states have (on average 1.1952975826479801) internal successors, (95778), 80129 states have internal predecessors, (95778), 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 03:27:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80130 states to 80130 states and 95778 transitions. [2023-11-29 03:27:02,309 INFO L78 Accepts]: Start accepts. Automaton has 80130 states and 95778 transitions. Word has length 117 [2023-11-29 03:27:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:27:02,309 INFO L495 AbstractCegarLoop]: Abstraction has 80130 states and 95778 transitions. [2023-11-29 03:27:02,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.235294117647058) internal successors, (314), 34 states have internal predecessors, (314), 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 03:27:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 80130 states and 95778 transitions. [2023-11-29 03:27:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 03:27:02,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:27:02,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:02,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:27:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 03:27:02,518 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:27:02,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash -815671498, now seen corresponding path program 1 times [2023-11-29 03:27:02,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:27:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785399782] [2023-11-29 03:27:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:27:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:27:03,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:27:03,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785399782] [2023-11-29 03:27:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785399782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:27:03,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181955419] [2023-11-29 03:27:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:27:03,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:27:03,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:27:03,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:27:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:03,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:27:03,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 31 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:27:04,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:27:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:27:04,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181955419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:27:04,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:27:04,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 32 [2023-11-29 03:27:04,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063930067] [2023-11-29 03:27:04,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:27:04,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 03:27:04,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:27:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 03:27:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-11-29 03:27:04,827 INFO L87 Difference]: Start difference. First operand 80130 states and 95778 transitions. Second operand has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 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 03:27:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:27:09,565 INFO L93 Difference]: Finished difference Result 197656 states and 235587 transitions. [2023-11-29 03:27:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 03:27:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 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 118 [2023-11-29 03:27:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:27:09,706 INFO L225 Difference]: With dead ends: 197656 [2023-11-29 03:27:09,706 INFO L226 Difference]: Without dead ends: 164199 [2023-11-29 03:27:09,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2108, Invalid=10548, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 03:27:09,726 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 4080 mSDsluCounter, 12172 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 12699 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:27:09,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4080 Valid, 12699 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 03:27:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164199 states. [2023-11-29 03:27:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164199 to 93708. [2023-11-29 03:27:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93708 states, 93707 states have (on average 1.194617264451962) internal successors, (111944), 93707 states have internal predecessors, (111944), 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 03:27:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93708 states to 93708 states and 111944 transitions. [2023-11-29 03:27:11,075 INFO L78 Accepts]: Start accepts. Automaton has 93708 states and 111944 transitions. Word has length 118 [2023-11-29 03:27:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:27:11,075 INFO L495 AbstractCegarLoop]: Abstraction has 93708 states and 111944 transitions. [2023-11-29 03:27:11,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 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 03:27:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 93708 states and 111944 transitions. [2023-11-29 03:27:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 03:27:11,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:27:11,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:11,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:27:11,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 03:27:11,287 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:27:11,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2032821529, now seen corresponding path program 1 times [2023-11-29 03:27:11,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:27:11,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284742460] [2023-11-29 03:27:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:11,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:27:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:27:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:27:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284742460] [2023-11-29 03:27:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284742460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:27:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371081244] [2023-11-29 03:27:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:11,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:27:11,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:27:11,697 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:27:11,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:27:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:11,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:27:11,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 55 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:27:12,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:27:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 03:27:13,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371081244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:27:13,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:27:13,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 28 [2023-11-29 03:27:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373482458] [2023-11-29 03:27:13,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:27:13,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 03:27:13,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:27:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 03:27:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-11-29 03:27:13,115 INFO L87 Difference]: Start difference. First operand 93708 states and 111944 transitions. Second operand has 28 states, 28 states have (on average 9.321428571428571) internal successors, (261), 28 states have internal predecessors, (261), 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 03:27:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:27:16,619 INFO L93 Difference]: Finished difference Result 261081 states and 310412 transitions. [2023-11-29 03:27:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 03:27:16,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 9.321428571428571) internal successors, (261), 28 states have internal predecessors, (261), 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 118 [2023-11-29 03:27:16,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:27:16,847 INFO L225 Difference]: With dead ends: 261081 [2023-11-29 03:27:16,847 INFO L226 Difference]: Without dead ends: 212117 [2023-11-29 03:27:16,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1492, Invalid=5818, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 03:27:16,896 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 2277 mSDsluCounter, 6290 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 6752 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:27:16,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 6752 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:27:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212117 states. [2023-11-29 03:27:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212117 to 118519. [2023-11-29 03:27:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118519 states, 118518 states have (on average 1.194628664000405) internal successors, (141585), 118518 states have internal predecessors, (141585), 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 03:27:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118519 states to 118519 states and 141585 transitions. [2023-11-29 03:27:18,812 INFO L78 Accepts]: Start accepts. Automaton has 118519 states and 141585 transitions. Word has length 118 [2023-11-29 03:27:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:27:18,812 INFO L495 AbstractCegarLoop]: Abstraction has 118519 states and 141585 transitions. [2023-11-29 03:27:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.321428571428571) internal successors, (261), 28 states have internal predecessors, (261), 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 03:27:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 118519 states and 141585 transitions. [2023-11-29 03:27:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 03:27:18,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:27:18,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:27:18,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 03:27:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 03:27:19,020 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:27:19,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1533611208, now seen corresponding path program 1 times [2023-11-29 03:27:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:27:19,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442361851] [2023-11-29 03:27:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:27:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:27:20,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:27:20,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442361851] [2023-11-29 03:27:20,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442361851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:27:20,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987136531] [2023-11-29 03:27:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:20,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:27:20,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:27:20,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:27:20,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:27:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:20,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 03:27:20,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 03:27:21,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:27:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 62 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:27:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987136531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:27:22,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:27:22,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 41 [2023-11-29 03:27:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169314965] [2023-11-29 03:27:22,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:27:22,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 03:27:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:27:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 03:27:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 03:27:22,374 INFO L87 Difference]: Start difference. First operand 118519 states and 141585 transitions. Second operand has 42 states, 42 states have (on average 7.333333333333333) internal successors, (308), 41 states have internal predecessors, (308), 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 03:30:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:18,319 INFO L93 Difference]: Finished difference Result 497873 states and 592491 transitions. [2023-11-29 03:30:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1008 states. [2023-11-29 03:30:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 7.333333333333333) internal successors, (308), 41 states have internal predecessors, (308), 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 119 [2023-11-29 03:30:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:18,861 INFO L225 Difference]: With dead ends: 497873 [2023-11-29 03:30:18,861 INFO L226 Difference]: Without dead ends: 465701 [2023-11-29 03:30:18,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1257 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 1045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516104 ImplicationChecksByTransitivity, 156.3s TimeCoverageRelationStatistics Valid=83172, Invalid=1011990, Unknown=0, NotChecked=0, Total=1095162 [2023-11-29 03:30:18,989 INFO L413 NwaCegarLoop]: 1962 mSDtfsCounter, 7977 mSDsluCounter, 38059 mSDsCounter, 0 mSdLazyCounter, 18740 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7977 SdHoareTripleChecker+Valid, 40021 SdHoareTripleChecker+Invalid, 18790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 18740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:18,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7977 Valid, 40021 Invalid, 18790 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [50 Valid, 18740 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2023-11-29 03:30:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465701 states. [2023-11-29 03:30:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465701 to 134773. [2023-11-29 03:30:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134773 states, 134772 states have (on average 1.1943727183688007) internal successors, (160968), 134772 states have internal predecessors, (160968), 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 03:30:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134773 states to 134773 states and 160968 transitions. [2023-11-29 03:30:22,891 INFO L78 Accepts]: Start accepts. Automaton has 134773 states and 160968 transitions. Word has length 119 [2023-11-29 03:30:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:22,892 INFO L495 AbstractCegarLoop]: Abstraction has 134773 states and 160968 transitions. [2023-11-29 03:30:22,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.333333333333333) internal successors, (308), 41 states have internal predecessors, (308), 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 03:30:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 134773 states and 160968 transitions. [2023-11-29 03:30:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 03:30:22,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:22,899 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:22,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:30:23,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 03:30:23,100 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:23,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1160195367, now seen corresponding path program 1 times [2023-11-29 03:30:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85574851] [2023-11-29 03:30:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 03:30:23,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85574851] [2023-11-29 03:30:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85574851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274352931] [2023-11-29 03:30:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:23,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:23,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:23,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:23,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:30:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:23,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 03:30:23,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 03:30:24,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:30:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274352931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:30:24,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:30:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2023-11-29 03:30:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828080316] [2023-11-29 03:30:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:30:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:30:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:30:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-29 03:30:24,593 INFO L87 Difference]: Start difference. First operand 134773 states and 160968 transitions. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 10 states have internal predecessors, (100), 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 03:30:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:25,741 INFO L93 Difference]: Finished difference Result 176629 states and 211245 transitions. [2023-11-29 03:30:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:30:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 10 states have internal predecessors, (100), 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 119 [2023-11-29 03:30:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:25,868 INFO L225 Difference]: With dead ends: 176629 [2023-11-29 03:30:25,868 INFO L226 Difference]: Without dead ends: 130796 [2023-11-29 03:30:25,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:30:25,898 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 547 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:25,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1090 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:30:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130796 states. [2023-11-29 03:30:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130796 to 127341. [2023-11-29 03:30:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127341 states, 127340 states have (on average 1.1940552850636093) internal successors, (152051), 127340 states have internal predecessors, (152051), 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 03:30:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127341 states to 127341 states and 152051 transitions. [2023-11-29 03:30:27,342 INFO L78 Accepts]: Start accepts. Automaton has 127341 states and 152051 transitions. Word has length 119 [2023-11-29 03:30:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:27,342 INFO L495 AbstractCegarLoop]: Abstraction has 127341 states and 152051 transitions. [2023-11-29 03:30:27,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 10 states have internal predecessors, (100), 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 03:30:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 127341 states and 152051 transitions. [2023-11-29 03:30:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 03:30:27,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:27,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:27,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:30:27,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 03:30:27,550 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:27,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash -980701421, now seen corresponding path program 1 times [2023-11-29 03:30:27,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:27,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137055667] [2023-11-29 03:30:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:27,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:28,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:28,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137055667] [2023-11-29 03:30:28,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137055667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:28,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928026935] [2023-11-29 03:30:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:28,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:28,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:28,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:30:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:28,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 03:30:28,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:29,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:30:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:30,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928026935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:30:30,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:30:30,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 33 [2023-11-29 03:30:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151115198] [2023-11-29 03:30:30,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:30:30,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 03:30:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:30:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 03:30:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:30:30,980 INFO L87 Difference]: Start difference. First operand 127341 states and 152051 transitions. Second operand has 34 states, 34 states have (on average 9.147058823529411) internal successors, (311), 33 states have internal predecessors, (311), 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 03:30:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:30:46,229 INFO L93 Difference]: Finished difference Result 294962 states and 347818 transitions. [2023-11-29 03:30:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-11-29 03:30:46,230 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 9.147058823529411) internal successors, (311), 33 states have internal predecessors, (311), 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 121 [2023-11-29 03:30:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:30:46,469 INFO L225 Difference]: With dead ends: 294962 [2023-11-29 03:30:46,469 INFO L226 Difference]: Without dead ends: 220664 [2023-11-29 03:30:46,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21585 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=10369, Invalid=48437, Unknown=0, NotChecked=0, Total=58806 [2023-11-29 03:30:46,527 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 3783 mSDsluCounter, 4942 mSDsCounter, 0 mSdLazyCounter, 5895 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 5448 SdHoareTripleChecker+Invalid, 5931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:30:46,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3783 Valid, 5448 Invalid, 5931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5895 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 03:30:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220664 states. [2023-11-29 03:30:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220664 to 120896. [2023-11-29 03:30:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120896 states, 120895 states have (on average 1.188717482112577) internal successors, (143710), 120895 states have internal predecessors, (143710), 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 03:30:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120896 states to 120896 states and 143710 transitions. [2023-11-29 03:30:48,549 INFO L78 Accepts]: Start accepts. Automaton has 120896 states and 143710 transitions. Word has length 121 [2023-11-29 03:30:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:30:48,549 INFO L495 AbstractCegarLoop]: Abstraction has 120896 states and 143710 transitions. [2023-11-29 03:30:48,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.147058823529411) internal successors, (311), 33 states have internal predecessors, (311), 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 03:30:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 120896 states and 143710 transitions. [2023-11-29 03:30:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 03:30:48,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:30:48,556 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 03:30:48,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:30:48,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 03:30:48,756 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:30:48,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:30:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 846346175, now seen corresponding path program 1 times [2023-11-29 03:30:48,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:30:48,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095209473] [2023-11-29 03:30:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:30:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:30:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095209473] [2023-11-29 03:30:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095209473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:30:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163036774] [2023-11-29 03:30:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:30:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:30:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:30:49,955 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:30:49,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2539b266-d4bc-4841-8fb7-51e667ac3aea/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:30:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:30:50,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 03:30:50,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:30:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:30:55,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163036774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:02,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:02,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28, 25] total 71 [2023-11-29 03:31:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760742316] [2023-11-29 03:31:02,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:02,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 03:31:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 03:31:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=4590, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 03:31:02,493 INFO L87 Difference]: Start difference. First operand 120896 states and 143710 transitions. Second operand has 71 states, 71 states have (on average 4.901408450704225) internal successors, (348), 71 states have internal predecessors, (348), 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)