./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx --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 ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:00:37,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:00:37,608 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:00:37,613 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:00:37,614 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:00:37,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:00:37,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:00:37,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:00:37,643 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:00:37,644 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:00:37,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:00:37,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:00:37,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:00:37,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:00:37,646 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:00:37,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:00:37,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:00:37,648 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:00:37,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:00:37,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:00:37,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:00:37,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:00:37,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:00:37,651 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:00:37,651 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:00:37,651 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:00:37,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:00:37,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:00:37,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:00:37,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:00:37,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:00:37,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:37,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:00:37,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:00:37,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:00:37,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:00:37,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:00:37,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:00:37,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:00:37,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:00:37,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:00:37,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:00:37,657 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_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea [2023-11-21 21:00:37,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:00:37,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:00:37,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:00:37,967 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:00:37,967 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:00:37,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-21 21:00:41,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:00:41,345 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:00:41,346 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-21 21:00:41,363 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/data/04af4cd50/28bc2b548fb44ad497b04dd9f1137e4a/FLAGcfb599779 [2023-11-21 21:00:41,381 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/data/04af4cd50/28bc2b548fb44ad497b04dd9f1137e4a [2023-11-21 21:00:41,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:00:41,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:00:41,394 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:41,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:00:41,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:00:41,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:41" (1/1) ... [2023-11-21 21:00:41,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16bd4f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41, skipping insertion in model container [2023-11-21 21:00:41,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:41" (1/1) ... [2023-11-21 21:00:41,481 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:00:41,792 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_96a0715a-e635-413f-afa0-4065cd847ce4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2023-11-21 21:00:41,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:41,904 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:00:41,984 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_96a0715a-e635-413f-afa0-4065cd847ce4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2023-11-21 21:00:42,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:42,058 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:00:42,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42 WrapperNode [2023-11-21 21:00:42,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:42,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:42,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:00:42,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:00:42,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,144 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 856 [2023-11-21 21:00:42,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:42,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:00:42,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:00:42,145 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:00:42,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,162 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,181 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 21:00:42,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,197 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:00:42,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:00:42,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:00:42,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:00:42,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (1/1) ... [2023-11-21 21:00:42,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:42,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:42,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:00:42,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a0715a-e635-413f-afa0-4065cd847ce4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:00:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:00:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:00:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:00:42,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:00:42,526 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:42,538 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:43,519 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:43,891 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:43,891 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 21:00:43,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:43 BoogieIcfgContainer [2023-11-21 21:00:43,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:43,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:43,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:43,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:43,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:41" (1/3) ... [2023-11-21 21:00:43,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35421bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:43, skipping insertion in model container [2023-11-21 21:00:43,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:42" (2/3) ... [2023-11-21 21:00:43,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35421bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:43, skipping insertion in model container [2023-11-21 21:00:43,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:43" (3/3) ... [2023-11-21 21:00:43,908 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-21 21:00:43,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:43,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:00:44,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:44,008 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;@3b769981, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:44,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:00:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-21 21:00:44,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:44,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:44,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:44,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2076854488, now seen corresponding path program 1 times [2023-11-21 21:00:44,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:44,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512061466] [2023-11-21 21:00:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:44,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:44,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512061466] [2023-11-21 21:00:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512061466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:44,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:44,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775422521] [2023-11-21 21:00:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:44,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:00:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:00:44,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:00:44,975 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2023-11-21 21:00:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:45,349 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2023-11-21 21:00:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 67 [2023-11-21 21:00:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:45,367 INFO L225 Difference]: With dead ends: 564 [2023-11-21 21:00:45,367 INFO L226 Difference]: Without dead ends: 469 [2023-11-21 21:00:45,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:00:45,374 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 686 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1349 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:00:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-11-21 21:00:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2023-11-21 21:00:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2023-11-21 21:00:45,442 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2023-11-21 21:00:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:45,443 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2023-11-21 21:00:45,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2023-11-21 21:00:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2023-11-21 21:00:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 21:00:45,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:45,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:00:45,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:45,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:45,450 INFO L85 PathProgramCache]: Analyzing trace with hash 863926947, now seen corresponding path program 1 times [2023-11-21 21:00:45,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:45,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109046750] [2023-11-21 21:00:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:45,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:45,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:45,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109046750] [2023-11-21 21:00:45,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109046750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:45,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:45,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:45,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564232218] [2023-11-21 21:00:45,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:45,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:45,664 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:45,970 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2023-11-21 21:00:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 [2023-11-21 21:00:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:45,976 INFO L225 Difference]: With dead ends: 1109 [2023-11-21 21:00:45,977 INFO L226 Difference]: Without dead ends: 728 [2023-11-21 21:00:45,985 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 [2023-11-21 21:00:45,988 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 567 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:45,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 234 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:00:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-11-21 21:00:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2023-11-21 21:00:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2023-11-21 21:00:46,045 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2023-11-21 21:00:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:46,046 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2023-11-21 21:00:46,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2023-11-21 21:00:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 21:00:46,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:46,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:00:46,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:46,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 367032434, now seen corresponding path program 1 times [2023-11-21 21:00:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:46,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014398111] [2023-11-21 21:00:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:46,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:46,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014398111] [2023-11-21 21:00:46,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014398111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:46,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:46,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332914814] [2023-11-21 21:00:46,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:46,287 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:46,557 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2023-11-21 21:00:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:46,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 [2023-11-21 21:00:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:46,565 INFO L225 Difference]: With dead ends: 1874 [2023-11-21 21:00:46,565 INFO L226 Difference]: Without dead ends: 1258 [2023-11-21 21:00:46,567 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 [2023-11-21 21:00:46,568 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 550 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:46,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 242 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-11-21 21:00:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2023-11-21 21:00:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2023-11-21 21:00:46,603 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2023-11-21 21:00:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:46,604 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2023-11-21 21:00:46,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2023-11-21 21:00:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 21:00:46,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:46,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:46,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:00:46,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:46,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2022414207, now seen corresponding path program 1 times [2023-11-21 21:00:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:46,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298157723] [2023-11-21 21:00:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:46,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298157723] [2023-11-21 21:00:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298157723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:46,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:46,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862528145] [2023-11-21 21:00:46,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:46,760 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:47,040 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2023-11-21 21:00:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 [2023-11-21 21:00:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:47,054 INFO L225 Difference]: With dead ends: 3430 [2023-11-21 21:00:47,054 INFO L226 Difference]: Without dead ends: 2318 [2023-11-21 21:00:47,057 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 [2023-11-21 21:00:47,067 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 568 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:47,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 243 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2023-11-21 21:00:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2023-11-21 21:00:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2023-11-21 21:00:47,147 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2023-11-21 21:00:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:47,149 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2023-11-21 21:00:47,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2023-11-21 21:00:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 21:00:47,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:47,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:47,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 21:00:47,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:47,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:47,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1255936236, now seen corresponding path program 1 times [2023-11-21 21:00:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:47,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445256605] [2023-11-21 21:00:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:47,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445256605] [2023-11-21 21:00:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445256605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:47,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:47,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550045981] [2023-11-21 21:00:47,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:47,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:47,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:47,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:47,353 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:47,616 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2023-11-21 21:00:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 [2023-11-21 21:00:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:47,644 INFO L225 Difference]: With dead ends: 6697 [2023-11-21 21:00:47,644 INFO L226 Difference]: Without dead ends: 4438 [2023-11-21 21:00:47,650 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 [2023-11-21 21:00:47,653 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 560 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:47,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 226 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2023-11-21 21:00:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2023-11-21 21:00:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2023-11-21 21:00:47,828 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2023-11-21 21:00:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:47,828 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2023-11-21 21:00:47,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2023-11-21 21:00:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 21:00:47,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:47,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:00:47,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:47,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:47,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1268143557, now seen corresponding path program 1 times [2023-11-21 21:00:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:47,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599193927] [2023-11-21 21:00:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:47,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:47,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:47,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599193927] [2023-11-21 21:00:47,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599193927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:47,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:47,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:47,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450594519] [2023-11-21 21:00:47,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:47,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:47,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:47,984 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:48,261 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2023-11-21 21:00:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:48,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 [2023-11-21 21:00:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:48,307 INFO L225 Difference]: With dead ends: 12353 [2023-11-21 21:00:48,309 INFO L226 Difference]: Without dead ends: 7958 [2023-11-21 21:00:48,316 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 [2023-11-21 21:00:48,317 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 565 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:48,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 218 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2023-11-21 21:00:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2023-11-21 21:00:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2023-11-21 21:00:48,583 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2023-11-21 21:00:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:48,583 INFO L495 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2023-11-21 21:00:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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) [2023-11-21 21:00:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2023-11-21 21:00:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 21:00:48,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:48,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:48,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 21:00:48,586 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:48,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1017348084, now seen corresponding path program 1 times [2023-11-21 21:00:48,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105871618] [2023-11-21 21:00:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:50,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105871618] [2023-11-21 21:00:50,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105871618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:50,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:50,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-21 21:00:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183658221] [2023-11-21 21:00:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:50,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 21:00:50,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 21:00:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:00:50,450 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:00:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:51,324 INFO L93 Difference]: Finished difference Result 15362 states and 22455 transitions. [2023-11-21 21:00:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 21:00:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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 69 [2023-11-21 21:00:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:51,406 INFO L225 Difference]: With dead ends: 15362 [2023-11-21 21:00:51,406 INFO L226 Difference]: Without dead ends: 15360 [2023-11-21 21:00:51,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-21 21:00:51,412 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 976 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:51,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1128 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15360 states. [2023-11-21 21:00:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15360 to 12609. [2023-11-21 21:00:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12609 states, 12608 states have (on average 1.460977157360406) internal successors, (18420), 12608 states have internal predecessors, (18420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 18420 transitions. [2023-11-21 21:00:51,820 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 18420 transitions. Word has length 69 [2023-11-21 21:00:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:51,821 INFO L495 AbstractCegarLoop]: Abstraction has 12609 states and 18420 transitions. [2023-11-21 21:00:51,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:00:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 18420 transitions. [2023-11-21 21:00:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 21:00:51,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:51,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:51,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 21:00:51,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:51,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1598833644, now seen corresponding path program 1 times [2023-11-21 21:00:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117407016] [2023-11-21 21:00:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117407016] [2023-11-21 21:00:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117407016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:53,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:53,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-21 21:00:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774823337] [2023-11-21 21:00:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:53,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 21:00:53,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:53,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 21:00:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:00:53,525 INFO L87 Difference]: Start difference. First operand 12609 states and 18420 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:00:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:54,686 INFO L93 Difference]: Finished difference Result 17818 states and 25960 transitions. [2023-11-21 21:00:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 21:00:54,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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 69 [2023-11-21 21:00:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:54,728 INFO L225 Difference]: With dead ends: 17818 [2023-11-21 21:00:54,728 INFO L226 Difference]: Without dead ends: 15832 [2023-11-21 21:00:54,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-21 21:00:54,737 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 898 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:54,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1720 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 21:00:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15832 states. [2023-11-21 21:00:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15832 to 14421. [2023-11-21 21:00:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 14420 states have (on average 1.4582524271844661) internal successors, (21028), 14420 states have internal predecessors, (21028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 21028 transitions. [2023-11-21 21:00:55,125 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 21028 transitions. Word has length 69 [2023-11-21 21:00:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:55,126 INFO L495 AbstractCegarLoop]: Abstraction has 14421 states and 21028 transitions. [2023-11-21 21:00:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:00:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 21028 transitions. [2023-11-21 21:00:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 21:00:55,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:55,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:55,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 21:00:55,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:55,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2131709900, now seen corresponding path program 1 times [2023-11-21 21:00:55,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:55,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743051858] [2023-11-21 21:00:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:55,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:57,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743051858] [2023-11-21 21:00:57,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743051858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:57,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:57,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-21 21:00:57,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523746920] [2023-11-21 21:00:57,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:57,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 21:00:57,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 21:00:57,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-11-21 21:00:57,634 INFO L87 Difference]: Start difference. First operand 14421 states and 21028 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) [2023-11-21 21:01:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:00,852 INFO L93 Difference]: Finished difference Result 17568 states and 25540 transitions. [2023-11-21 21:01:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-21 21:01:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 69 [2023-11-21 21:01:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:00,894 INFO L225 Difference]: With dead ends: 17568 [2023-11-21 21:01:00,894 INFO L226 Difference]: Without dead ends: 17566 [2023-11-21 21:01:00,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2023-11-21 21:01:00,900 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1166 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:00,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 2302 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 21:01:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17566 states. [2023-11-21 21:01:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17566 to 14439. [2023-11-21 21:01:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14439 states, 14438 states have (on average 1.4578196426097798) internal successors, (21048), 14438 states have internal predecessors, (21048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14439 states to 14439 states and 21048 transitions. [2023-11-21 21:01:01,204 INFO L78 Accepts]: Start accepts. Automaton has 14439 states and 21048 transitions. Word has length 69 [2023-11-21 21:01:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:01,204 INFO L495 AbstractCegarLoop]: Abstraction has 14439 states and 21048 transitions. [2023-11-21 21:01:01,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) [2023-11-21 21:01:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14439 states and 21048 transitions. [2023-11-21 21:01:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 21:01:01,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:01,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 21:01:01,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:01,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1936720940, now seen corresponding path program 1 times [2023-11-21 21:01:01,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:01,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311816123] [2023-11-21 21:01:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:01,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:02,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311816123] [2023-11-21 21:01:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311816123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-21 21:01:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444523385] [2023-11-21 21:01:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 21:01:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 21:01:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:01:02,767 INFO L87 Difference]: Start difference. First operand 14439 states and 21048 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:01:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:03,816 INFO L93 Difference]: Finished difference Result 24441 states and 35661 transitions. [2023-11-21 21:01:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 21:01:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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 69 [2023-11-21 21:01:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:03,866 INFO L225 Difference]: With dead ends: 24441 [2023-11-21 21:01:03,867 INFO L226 Difference]: Without dead ends: 24439 [2023-11-21 21:01:03,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-21 21:01:03,874 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 859 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 2311 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:03,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 2311 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 21:01:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24439 states. [2023-11-21 21:01:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24439 to 16097. [2023-11-21 21:01:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16097 states, 16096 states have (on average 1.458312624254473) internal successors, (23473), 16096 states have internal predecessors, (23473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16097 states to 16097 states and 23473 transitions. [2023-11-21 21:01:04,301 INFO L78 Accepts]: Start accepts. Automaton has 16097 states and 23473 transitions. Word has length 69 [2023-11-21 21:01:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:04,301 INFO L495 AbstractCegarLoop]: Abstraction has 16097 states and 23473 transitions. [2023-11-21 21:01:04,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:01:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 16097 states and 23473 transitions. [2023-11-21 21:01:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 21:01:04,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:04,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:04,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 21:01:04,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:04,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash -172568500, now seen corresponding path program 1 times [2023-11-21 21:01:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462527239] [2023-11-21 21:01:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:05,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:05,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462527239] [2023-11-21 21:01:05,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462527239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:05,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:05,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-21 21:01:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907527743] [2023-11-21 21:01:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 21:01:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 21:01:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:01:05,678 INFO L87 Difference]: Start difference. First operand 16097 states and 23473 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:01:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:06,854 INFO L93 Difference]: Finished difference Result 28574 states and 41770 transitions. [2023-11-21 21:01:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 21:01:06,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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 69 [2023-11-21 21:01:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:06,887 INFO L225 Difference]: With dead ends: 28574 [2023-11-21 21:01:06,887 INFO L226 Difference]: Without dead ends: 28572 [2023-11-21 21:01:06,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-21 21:01:06,896 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 822 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:06,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 2271 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:01:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28572 states. [2023-11-21 21:01:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28572 to 17624. [2023-11-21 21:01:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17624 states, 17623 states have (on average 1.4593996481870284) internal successors, (25719), 17623 states have internal predecessors, (25719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17624 states to 17624 states and 25719 transitions. [2023-11-21 21:01:07,258 INFO L78 Accepts]: Start accepts. Automaton has 17624 states and 25719 transitions. Word has length 69 [2023-11-21 21:01:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:07,259 INFO L495 AbstractCegarLoop]: Abstraction has 17624 states and 25719 transitions. [2023-11-21 21:01:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 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) [2023-11-21 21:01:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 17624 states and 25719 transitions. [2023-11-21 21:01:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 21:01:07,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:07,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 21:01:07,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:07,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash 187530784, now seen corresponding path program 1 times [2023-11-21 21:01:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381748109] [2023-11-21 21:01:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:08,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:08,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381748109] [2023-11-21 21:01:08,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381748109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:08,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:08,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-21 21:01:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647976113] [2023-11-21 21:01:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 21:01:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 21:01:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-21 21:01:08,760 INFO L87 Difference]: Start difference. First operand 17624 states and 25719 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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) [2023-11-21 21:01:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:10,341 INFO L93 Difference]: Finished difference Result 22854 states and 33284 transitions. [2023-11-21 21:01:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 21:01:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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 [2023-11-21 21:01:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:10,364 INFO L225 Difference]: With dead ends: 22854 [2023-11-21 21:01:10,364 INFO L226 Difference]: Without dead ends: 20868 [2023-11-21 21:01:10,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2023-11-21 21:01:10,372 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 825 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 3112 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:10,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 3112 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 21:01:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2023-11-21 21:01:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 17630. [2023-11-21 21:01:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17630 states, 17629 states have (on average 1.4593000170174144) internal successors, (25726), 17629 states have internal predecessors, (25726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17630 states to 17630 states and 25726 transitions. [2023-11-21 21:01:10,740 INFO L78 Accepts]: Start accepts. Automaton has 17630 states and 25726 transitions. Word has length 71 [2023-11-21 21:01:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:10,740 INFO L495 AbstractCegarLoop]: Abstraction has 17630 states and 25726 transitions. [2023-11-21 21:01:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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) [2023-11-21 21:01:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 17630 states and 25726 transitions. [2023-11-21 21:01:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 21:01:10,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:10,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:10,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 21:01:10,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:10,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:10,743 INFO L85 PathProgramCache]: Analyzing trace with hash 720407040, now seen corresponding path program 1 times [2023-11-21 21:01:10,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:10,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777633914] [2023-11-21 21:01:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:10,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:12,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:12,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777633914] [2023-11-21 21:01:12,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777633914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:12,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:12,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-21 21:01:12,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953661083] [2023-11-21 21:01:12,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:12,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 21:01:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 21:01:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-21 21:01:12,118 INFO L87 Difference]: Start difference. First operand 17630 states and 25726 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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) [2023-11-21 21:01:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:13,090 INFO L93 Difference]: Finished difference Result 29659 states and 43201 transitions. [2023-11-21 21:01:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 21:01:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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 [2023-11-21 21:01:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:13,119 INFO L225 Difference]: With dead ends: 29659 [2023-11-21 21:01:13,119 INFO L226 Difference]: Without dead ends: 29657 [2023-11-21 21:01:13,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-11-21 21:01:13,126 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 987 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:13,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 1348 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:01:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29657 states. [2023-11-21 21:01:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29657 to 17630. [2023-11-21 21:01:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17630 states, 17629 states have (on average 1.459243292302456) internal successors, (25725), 17629 states have internal predecessors, (25725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17630 states to 17630 states and 25725 transitions. [2023-11-21 21:01:13,425 INFO L78 Accepts]: Start accepts. Automaton has 17630 states and 25725 transitions. Word has length 71 [2023-11-21 21:01:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:13,425 INFO L495 AbstractCegarLoop]: Abstraction has 17630 states and 25725 transitions. [2023-11-21 21:01:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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) [2023-11-21 21:01:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 17630 states and 25725 transitions. [2023-11-21 21:01:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 21:01:13,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:13,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:13,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 21:01:13,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:13,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1979787808, now seen corresponding path program 1 times [2023-11-21 21:01:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878647691] [2023-11-21 21:01:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878647691] [2023-11-21 21:01:15,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878647691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:15,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:15,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-21 21:01:15,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174747210] [2023-11-21 21:01:15,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:15,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 21:01:15,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 21:01:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-21 21:01:15,588 INFO L87 Difference]: Start difference. First operand 17630 states and 25725 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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) [2023-11-21 21:01:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:18,737 INFO L93 Difference]: Finished difference Result 20821 states and 30284 transitions. [2023-11-21 21:01:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 21:01:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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 [2023-11-21 21:01:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:18,759 INFO L225 Difference]: With dead ends: 20821 [2023-11-21 21:01:18,759 INFO L226 Difference]: Without dead ends: 20819 [2023-11-21 21:01:18,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2023-11-21 21:01:18,764 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 982 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 2829 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:18,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 2244 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2829 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-21 21:01:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20819 states. [2023-11-21 21:01:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20819 to 17639. [2023-11-21 21:01:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17639 states, 17638 states have (on average 1.4591223494727292) internal successors, (25736), 17638 states have internal predecessors, (25736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17639 states to 17639 states and 25736 transitions. [2023-11-21 21:01:18,972 INFO L78 Accepts]: Start accepts. Automaton has 17639 states and 25736 transitions. Word has length 71 [2023-11-21 21:01:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:18,973 INFO L495 AbstractCegarLoop]: Abstraction has 17639 states and 25736 transitions. [2023-11-21 21:01:18,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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) [2023-11-21 21:01:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17639 states and 25736 transitions. [2023-11-21 21:01:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 21:01:18,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:18,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 21:01:18,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:18,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1753265760, now seen corresponding path program 1 times [2023-11-21 21:01:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939024813] [2023-11-21 21:01:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:20,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:20,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939024813] [2023-11-21 21:01:20,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939024813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:20,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:20,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-21 21:01:20,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428686456] [2023-11-21 21:01:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:20,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 21:01:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 21:01:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-21 21:01:20,465 INFO L87 Difference]: Start difference. First operand 17639 states and 25736 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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) [2023-11-21 21:01:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:21,643 INFO L93 Difference]: Finished difference Result 29721 states and 43275 transitions. [2023-11-21 21:01:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 21:01:21,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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 [2023-11-21 21:01:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:21,674 INFO L225 Difference]: With dead ends: 29721 [2023-11-21 21:01:21,674 INFO L226 Difference]: Without dead ends: 29719 [2023-11-21 21:01:21,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2023-11-21 21:01:21,681 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 906 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:21,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1932 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 21:01:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29719 states. [2023-11-21 21:01:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29719 to 17656. [2023-11-21 21:01:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17656 states, 17655 states have (on average 1.4589634664401019) internal successors, (25758), 17655 states have internal predecessors, (25758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:01:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17656 states to 17656 states and 25758 transitions. [2023-11-21 21:01:21,893 INFO L78 Accepts]: Start accepts. Automaton has 17656 states and 25758 transitions. Word has length 71 [2023-11-21 21:01:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:21,893 INFO L495 AbstractCegarLoop]: Abstraction has 17656 states and 25758 transitions. [2023-11-21 21:01:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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) [2023-11-21 21:01:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 17656 states and 25758 transitions. [2023-11-21 21:01:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 21:01:21,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:21,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:21,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 21:01:21,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:21,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:21,895 INFO L85 PathProgramCache]: Analyzing trace with hash 74480192, now seen corresponding path program 1 times [2023-11-21 21:01:21,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:21,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97849901] [2023-11-21 21:01:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:21,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:23,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:23,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97849901] [2023-11-21 21:01:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97849901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:23,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-21 21:01:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744610397] [2023-11-21 21:01:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 21:01:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 21:01:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-21 21:01:23,476 INFO L87 Difference]: Start difference. First operand 17656 states and 25758 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 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)