./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/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_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label29.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/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_3cbfe313-90a6-4c6e-9268-3450def1407d/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 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:04:30,491 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:04:30,559 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:04:30,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:04:30,566 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:04:30,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:04:30,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:04:30,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:04:30,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:04:30,609 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:04:30,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:04:30,610 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:04:30,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:04:30,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:04:30,615 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:04:30,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:04:30,618 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:04:30,622 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:04:30,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:04:30,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:04:30,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:04:30,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:04:30,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:04:30,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:04:30,626 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:04:30,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:04:30,627 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:04:30,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:04:30,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:04:30,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:04:30,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:04:30,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:04:30,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:04:30,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:04:30,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:04:30,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:04:30,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:04:30,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:04:30,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:04:30,633 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:04:30,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:04:30,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:04:30,634 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_3cbfe313-90a6-4c6e-9268-3450def1407d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf [2023-11-21 21:04:30,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:04:30,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:04:30,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:04:30,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:04:30,995 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:04:30,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2023-11-21 21:04:34,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:04:34,485 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:04:34,486 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2023-11-21 21:04:34,510 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/data/7e192052a/f0fe07114feb439cbee7e3111939c4f2/FLAGde82f116a [2023-11-21 21:04:34,528 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/data/7e192052a/f0fe07114feb439cbee7e3111939c4f2 [2023-11-21 21:04:34,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:04:34,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:04:34,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:04:34,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:04:34,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:04:34,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:04:34" (1/1) ... [2023-11-21 21:04:34,549 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bef35e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:34, skipping insertion in model container [2023-11-21 21:04:34,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:04:34" (1/1) ... [2023-11-21 21:04:34,633 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:04:35,440 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_3cbfe313-90a6-4c6e-9268-3450def1407d/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2023-11-21 21:04:35,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:04:35,500 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:04:35,796 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_3cbfe313-90a6-4c6e-9268-3450def1407d/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2023-11-21 21:04:35,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:04:35,833 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:04:35,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35 WrapperNode [2023-11-21 21:04:35,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:04:35,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:04:35,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:04:35,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:04:35,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:35,881 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:35,990 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-21 21:04:35,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:04:35,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:04:35,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:04:35,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:04:36,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,015 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,044 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 21:04:36,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:04:36,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:04:36,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:04:36,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:04:36,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (1/1) ... [2023-11-21 21:04:36,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:04:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:36,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:04:36,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:04:36,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:04:36,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:04:36,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:04:36,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:04:36,346 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:04:36,349 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:04:38,416 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:04:39,218 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:04:39,220 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 21:04:39,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:04:39 BoogieIcfgContainer [2023-11-21 21:04:39,222 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:04:39,225 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:04:39,225 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:04:39,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:04:39,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:04:34" (1/3) ... [2023-11-21 21:04:39,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780c1a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:04:39, skipping insertion in model container [2023-11-21 21:04:39,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:35" (2/3) ... [2023-11-21 21:04:39,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780c1a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:04:39, skipping insertion in model container [2023-11-21 21:04:39,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:04:39" (3/3) ... [2023-11-21 21:04:39,234 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2023-11-21 21:04:39,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:04:39,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:04:39,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:04:39,319 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;@3a5cf951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:04:39,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:04:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-21 21:04:39,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:39,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:39,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1070317775, now seen corresponding path program 1 times [2023-11-21 21:04:39,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:39,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528064460] [2023-11-21 21:04:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:39,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:40,329 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 21:04:40,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528064460] [2023-11-21 21:04:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528064460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:40,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:04:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244902174] [2023-11-21 21:04:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:40,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:40,370 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 21:04:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:41,294 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-21 21:04:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2023-11-21 21:04:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:41,311 INFO L225 Difference]: With dead ends: 440 [2023-11-21 21:04:41,311 INFO L226 Difference]: Without dead ends: 289 [2023-11-21 21:04:41,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:41,318 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:41,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 21:04:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-21 21:04:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-21 21:04:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9097222222222223) internal successors, (550), 288 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 21:04:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 550 transitions. [2023-11-21 21:04:41,380 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 550 transitions. Word has length 143 [2023-11-21 21:04:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:41,381 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 550 transitions. [2023-11-21 21:04:41,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 21:04:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 550 transitions. [2023-11-21 21:04:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-21 21:04:41,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:41,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:41,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:04:41,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:41,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2116564071, now seen corresponding path program 1 times [2023-11-21 21:04:41,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:41,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921429604] [2023-11-21 21:04:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:41,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:04:41,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:41,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921429604] [2023-11-21 21:04:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921429604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:41,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:04:41,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709708131] [2023-11-21 21:04:41,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:41,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:41,820 INFO L87 Difference]: Start difference. First operand 289 states and 550 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:42,609 INFO L93 Difference]: Finished difference Result 865 states and 1648 transitions. [2023-11-21 21:04:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2023-11-21 21:04:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:42,614 INFO L225 Difference]: With dead ends: 865 [2023-11-21 21:04:42,614 INFO L226 Difference]: Without dead ends: 577 [2023-11-21 21:04:42,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:42,617 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:42,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 50 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-21 21:04:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2023-11-21 21:04:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7613240418118468) internal successors, (1011), 574 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1011 transitions. [2023-11-21 21:04:42,649 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1011 transitions. Word has length 148 [2023-11-21 21:04:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:42,674 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1011 transitions. [2023-11-21 21:04:42,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1011 transitions. [2023-11-21 21:04:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 21:04:42,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:42,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:42,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:04:42,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:42,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:42,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1049610704, now seen corresponding path program 1 times [2023-11-21 21:04:42,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:42,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285737897] [2023-11-21 21:04:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:42,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:04:42,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:42,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285737897] [2023-11-21 21:04:42,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285737897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:42,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:42,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:04:42,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528423894] [2023-11-21 21:04:42,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:42,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:42,886 INFO L87 Difference]: Start difference. First operand 575 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:43,760 INFO L93 Difference]: Finished difference Result 1721 states and 3030 transitions. [2023-11-21 21:04:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-21 21:04:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:43,768 INFO L225 Difference]: With dead ends: 1721 [2023-11-21 21:04:43,769 INFO L226 Difference]: Without dead ends: 1147 [2023-11-21 21:04:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:43,771 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:43,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-21 21:04:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-21 21:04:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.712041884816754) internal successors, (1962), 1146 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 21:04:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1962 transitions. [2023-11-21 21:04:43,816 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1962 transitions. Word has length 151 [2023-11-21 21:04:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:43,817 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1962 transitions. [2023-11-21 21:04:43,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1962 transitions. [2023-11-21 21:04:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-21 21:04:43,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:43,824 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:04:43,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:43,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1748195447, now seen corresponding path program 1 times [2023-11-21 21:04:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:43,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57984743] [2023-11-21 21:04:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:04:44,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:44,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57984743] [2023-11-21 21:04:44,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57984743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:44,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:44,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:04:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607273498] [2023-11-21 21:04:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:44,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:44,215 INFO L87 Difference]: Start difference. First operand 1147 states and 1962 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 21:04:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:45,174 INFO L93 Difference]: Finished difference Result 2865 states and 4921 transitions. [2023-11-21 21:04:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 163 [2023-11-21 21:04:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:45,185 INFO L225 Difference]: With dead ends: 2865 [2023-11-21 21:04:45,186 INFO L226 Difference]: Without dead ends: 1719 [2023-11-21 21:04:45,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:45,189 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 153 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:45,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 260 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 21:04:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2023-11-21 21:04:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2023-11-21 21:04:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5465657741559953) internal successors, (2657), 1718 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states 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 21:04:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2657 transitions. [2023-11-21 21:04:45,237 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2657 transitions. Word has length 163 [2023-11-21 21:04:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:45,238 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2657 transitions. [2023-11-21 21:04:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 21:04:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2657 transitions. [2023-11-21 21:04:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-21 21:04:45,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:45,243 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:45,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 21:04:45,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:45,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1828715747, now seen corresponding path program 1 times [2023-11-21 21:04:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63962251] [2023-11-21 21:04:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:45,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:04:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63962251] [2023-11-21 21:04:45,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63962251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:45,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:45,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:04:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289197411] [2023-11-21 21:04:45,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:45,719 INFO L87 Difference]: Start difference. First operand 1719 states and 2657 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 21:04:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:46,598 INFO L93 Difference]: Finished difference Result 4295 states and 6609 transitions. [2023-11-21 21:04:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:46,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 171 [2023-11-21 21:04:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:46,614 INFO L225 Difference]: With dead ends: 4295 [2023-11-21 21:04:46,615 INFO L226 Difference]: Without dead ends: 2577 [2023-11-21 21:04:46,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:46,623 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:46,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 267 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2023-11-21 21:04:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2023-11-21 21:04:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.4638975155279503) internal successors, (3771), 2576 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states 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 21:04:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 3771 transitions. [2023-11-21 21:04:46,698 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 3771 transitions. Word has length 171 [2023-11-21 21:04:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:46,698 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 3771 transitions. [2023-11-21 21:04:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 21:04:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 3771 transitions. [2023-11-21 21:04:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-21 21:04:46,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:46,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:46,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:04:46,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:46,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1618272126, now seen corresponding path program 1 times [2023-11-21 21:04:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267082903] [2023-11-21 21:04:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:46,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 21:04:47,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267082903] [2023-11-21 21:04:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267082903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:47,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:47,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:04:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184822327] [2023-11-21 21:04:47,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:47,206 INFO L87 Difference]: Start difference. First operand 2577 states and 3771 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:48,114 INFO L93 Difference]: Finished difference Result 6871 states and 9913 transitions. [2023-11-21 21:04:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2023-11-21 21:04:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:48,140 INFO L225 Difference]: With dead ends: 6871 [2023-11-21 21:04:48,141 INFO L226 Difference]: Without dead ends: 4295 [2023-11-21 21:04:48,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:48,146 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 173 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:48,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 23 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2023-11-21 21:04:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 4293. [2023-11-21 21:04:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.4214818266542404) internal successors, (6101), 4292 states have internal predecessors, (6101), 0 states have call successors, (0), 0 states 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 21:04:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6101 transitions. [2023-11-21 21:04:48,291 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6101 transitions. Word has length 171 [2023-11-21 21:04:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:48,297 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 6101 transitions. [2023-11-21 21:04:48,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6101 transitions. [2023-11-21 21:04:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-21 21:04:48,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:48,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:48,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 21:04:48,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:48,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash -397718714, now seen corresponding path program 1 times [2023-11-21 21:04:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:48,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028488181] [2023-11-21 21:04:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 21:04:48,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028488181] [2023-11-21 21:04:48,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028488181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:48,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:04:48,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787619551] [2023-11-21 21:04:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:48,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:48,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:48,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:48,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:48,880 INFO L87 Difference]: Start difference. First operand 4293 states and 6101 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 21:04:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:49,781 INFO L93 Difference]: Finished difference Result 11304 states and 16045 transitions. [2023-11-21 21:04:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 178 [2023-11-21 21:04:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:49,823 INFO L225 Difference]: With dead ends: 11304 [2023-11-21 21:04:49,823 INFO L226 Difference]: Without dead ends: 7012 [2023-11-21 21:04:49,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:49,832 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:49,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 46 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7012 states. [2023-11-21 21:04:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7012 to 7010. [2023-11-21 21:04:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7010 states, 7009 states have (on average 1.4117563133114568) internal successors, (9895), 7009 states have internal predecessors, (9895), 0 states have call successors, (0), 0 states 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 21:04:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 9895 transitions. [2023-11-21 21:04:50,042 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 9895 transitions. Word has length 178 [2023-11-21 21:04:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:50,044 INFO L495 AbstractCegarLoop]: Abstraction has 7010 states and 9895 transitions. [2023-11-21 21:04:50,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 21:04:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 9895 transitions. [2023-11-21 21:04:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-21 21:04:50,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:50,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 21:04:50,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:50,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 463122485, now seen corresponding path program 1 times [2023-11-21 21:04:50,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:50,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837123415] [2023-11-21 21:04:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:50,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:04:50,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:50,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837123415] [2023-11-21 21:04:50,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837123415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:04:50,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327801477] [2023-11-21 21:04:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:50,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:50,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:50,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:04:50,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:04:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:50,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:04:50,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:04:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:04:51,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:04:51,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327801477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:51,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:04:51,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-21 21:04:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745787541] [2023-11-21 21:04:51,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:51,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:04:51,189 INFO L87 Difference]: Start difference. First operand 7010 states and 9895 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 21:04:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:52,156 INFO L93 Difference]: Finished difference Result 15449 states and 21990 transitions. [2023-11-21 21:04:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2023-11-21 21:04:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:52,205 INFO L225 Difference]: With dead ends: 15449 [2023-11-21 21:04:52,205 INFO L226 Difference]: Without dead ends: 8869 [2023-11-21 21:04:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:04:52,214 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:52,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 234 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2023-11-21 21:04:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8869. [2023-11-21 21:04:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8868 states have (on average 1.373364907532702) internal successors, (12179), 8868 states have internal predecessors, (12179), 0 states have call successors, (0), 0 states 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 21:04:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 12179 transitions. [2023-11-21 21:04:52,497 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 12179 transitions. Word has length 181 [2023-11-21 21:04:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:52,498 INFO L495 AbstractCegarLoop]: Abstraction has 8869 states and 12179 transitions. [2023-11-21 21:04:52,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 21:04:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 12179 transitions. [2023-11-21 21:04:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-21 21:04:52,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:52,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:52,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:04:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:52,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:52,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1687630978, now seen corresponding path program 1 times [2023-11-21 21:04:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574608206] [2023-11-21 21:04:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:04:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574608206] [2023-11-21 21:04:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574608206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:53,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:53,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:04:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651600977] [2023-11-21 21:04:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:53,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:04:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:04:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:04:53,266 INFO L87 Difference]: Start difference. First operand 8869 states and 12179 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 21:04:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:54,724 INFO L93 Difference]: Finished difference Result 17594 states and 24126 transitions. [2023-11-21 21:04:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:04:54,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 187 [2023-11-21 21:04:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:54,759 INFO L225 Difference]: With dead ends: 17594 [2023-11-21 21:04:54,759 INFO L226 Difference]: Without dead ends: 9155 [2023-11-21 21:04:54,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:04:54,772 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 253 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:54,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 66 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 21:04:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2023-11-21 21:04:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 8869. [2023-11-21 21:04:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8868 states have (on average 1.373364907532702) internal successors, (12179), 8868 states have internal predecessors, (12179), 0 states have call successors, (0), 0 states 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 21:04:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 12179 transitions. [2023-11-21 21:04:54,986 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 12179 transitions. Word has length 187 [2023-11-21 21:04:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:54,987 INFO L495 AbstractCegarLoop]: Abstraction has 8869 states and 12179 transitions. [2023-11-21 21:04:54,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 21:04:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 12179 transitions. [2023-11-21 21:04:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-21 21:04:55,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:55,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:55,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 21:04:55,008 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:55,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash 568475215, now seen corresponding path program 1 times [2023-11-21 21:04:55,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:55,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820455116] [2023-11-21 21:04:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 21:04:55,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:55,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820455116] [2023-11-21 21:04:55,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820455116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:04:55,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737709671] [2023-11-21 21:04:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:55,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:55,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:04:55,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:04:55,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:04:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:55,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:04:55,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:04:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 21:04:55,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:04:55,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737709671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:55,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:04:55,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-21 21:04:55,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481657881] [2023-11-21 21:04:55,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:55,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:55,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:04:55,989 INFO L87 Difference]: Start difference. First operand 8869 states and 12179 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:56,933 INFO L93 Difference]: Finished difference Result 22599 states and 31281 transitions. [2023-11-21 21:04:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2023-11-21 21:04:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:56,966 INFO L225 Difference]: With dead ends: 22599 [2023-11-21 21:04:56,967 INFO L226 Difference]: Without dead ends: 14017 [2023-11-21 21:04:56,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:04:56,980 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:56,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 21:04:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14017 states. [2023-11-21 21:04:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14017 to 11729. [2023-11-21 21:04:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 1.4059515688949522) internal successors, (16489), 11728 states have internal predecessors, (16489), 0 states have call successors, (0), 0 states 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 21:04:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 16489 transitions. [2023-11-21 21:04:57,324 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 16489 transitions. Word has length 194 [2023-11-21 21:04:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:57,324 INFO L495 AbstractCegarLoop]: Abstraction has 11729 states and 16489 transitions. [2023-11-21 21:04:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:04:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 16489 transitions. [2023-11-21 21:04:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-21 21:04:57,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:57,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:04:57,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:04:57,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:04:57,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:57,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1843972933, now seen corresponding path program 1 times [2023-11-21 21:04:57,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:57,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557522320] [2023-11-21 21:04:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:57,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:04:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:04:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:04:58,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557522320] [2023-11-21 21:04:58,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557522320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:04:58,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:04:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:04:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436562499] [2023-11-21 21:04:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:04:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:04:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:04:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:04:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:58,179 INFO L87 Difference]: Start difference. First operand 11729 states and 16489 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 21:04:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:04:59,330 INFO L93 Difference]: Finished difference Result 25888 states and 36134 transitions. [2023-11-21 21:04:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:04:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2023-11-21 21:04:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:04:59,365 INFO L225 Difference]: With dead ends: 25888 [2023-11-21 21:04:59,365 INFO L226 Difference]: Without dead ends: 14160 [2023-11-21 21:04:59,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:04:59,382 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 88 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 21:04:59,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 86 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 21:04:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2023-11-21 21:04:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 14160. [2023-11-21 21:04:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14160 states, 14159 states have (on average 1.3721308001977541) internal successors, (19428), 14159 states have internal predecessors, (19428), 0 states have call successors, (0), 0 states 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 21:04:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 19428 transitions. [2023-11-21 21:04:59,827 INFO L78 Accepts]: Start accepts. Automaton has 14160 states and 19428 transitions. Word has length 201 [2023-11-21 21:04:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:04:59,830 INFO L495 AbstractCegarLoop]: Abstraction has 14160 states and 19428 transitions. [2023-11-21 21:04:59,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 21:04:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 14160 states and 19428 transitions. [2023-11-21 21:04:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-21 21:04:59,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:04:59,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:59,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 21:04:59,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:04:59,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:04:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1105953706, now seen corresponding path program 1 times [2023-11-21 21:04:59,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:04:59,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882303356] [2023-11-21 21:04:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:04:59,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:04:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:00,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882303356] [2023-11-21 21:05:00,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882303356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:05:00,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424883919] [2023-11-21 21:05:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:00,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:05:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:05:00,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:05:00,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:05:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:00,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:05:00,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:05:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:05:01,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:05:01,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424883919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:01,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:05:01,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-21 21:05:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098789810] [2023-11-21 21:05:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:01,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:01,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:01,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:01,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:05:01,018 INFO L87 Difference]: Start difference. First operand 14160 states and 19428 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:05:02,314 INFO L93 Difference]: Finished difference Result 32466 states and 45107 transitions. [2023-11-21 21:05:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:02,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2023-11-21 21:05:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:05:02,367 INFO L225 Difference]: With dead ends: 32466 [2023-11-21 21:05:02,367 INFO L226 Difference]: Without dead ends: 18450 [2023-11-21 21:05:02,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:05:02,390 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 101 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:05:02,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 93 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 21:05:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18450 states. [2023-11-21 21:05:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18450 to 18450. [2023-11-21 21:05:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18450 states, 18449 states have (on average 1.298932191446691) internal successors, (23964), 18449 states have internal predecessors, (23964), 0 states have call successors, (0), 0 states 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 21:05:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18450 states to 18450 states and 23964 transitions. [2023-11-21 21:05:02,815 INFO L78 Accepts]: Start accepts. Automaton has 18450 states and 23964 transitions. Word has length 208 [2023-11-21 21:05:02,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:05:02,815 INFO L495 AbstractCegarLoop]: Abstraction has 18450 states and 23964 transitions. [2023-11-21 21:05:02,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 18450 states and 23964 transitions. [2023-11-21 21:05:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-21 21:05:02,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:05:02,879 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:02,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:05:03,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 21:05:03,105 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:05:03,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1385208976, now seen corresponding path program 1 times [2023-11-21 21:05:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:03,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963241681] [2023-11-21 21:05:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:03,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 21:05:03,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963241681] [2023-11-21 21:05:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963241681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:03,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:03,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:05:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982535739] [2023-11-21 21:05:03,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:03,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:03,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:03,454 INFO L87 Difference]: Start difference. First operand 18450 states and 23964 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 21:05:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:05:04,153 INFO L93 Difference]: Finished difference Result 33038 states and 42676 transitions. [2023-11-21 21:05:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:04,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2023-11-21 21:05:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:05:04,189 INFO L225 Difference]: With dead ends: 33038 [2023-11-21 21:05:04,189 INFO L226 Difference]: Without dead ends: 15018 [2023-11-21 21:05:04,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:04,209 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:05:04,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:05:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15018 states. [2023-11-21 21:05:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15018 to 15018. [2023-11-21 21:05:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15018 states, 15017 states have (on average 1.2595724845175469) internal successors, (18915), 15017 states have internal predecessors, (18915), 0 states have call successors, (0), 0 states 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 21:05:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15018 states to 15018 states and 18915 transitions. [2023-11-21 21:05:04,549 INFO L78 Accepts]: Start accepts. Automaton has 15018 states and 18915 transitions. Word has length 219 [2023-11-21 21:05:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:05:04,550 INFO L495 AbstractCegarLoop]: Abstraction has 15018 states and 18915 transitions. [2023-11-21 21:05:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 21:05:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15018 states and 18915 transitions. [2023-11-21 21:05:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-21 21:05:04,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:05:04,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:04,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 21:05:04,564 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:05:04,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1757687967, now seen corresponding path program 1 times [2023-11-21 21:05:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503840650] [2023-11-21 21:05:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:04,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-21 21:05:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503840650] [2023-11-21 21:05:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503840650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:05,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:05,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:05:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838378536] [2023-11-21 21:05:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:05,027 INFO L87 Difference]: Start difference. First operand 15018 states and 18915 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 21:05:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:05:06,069 INFO L93 Difference]: Finished difference Result 34039 states and 42784 transitions. [2023-11-21 21:05:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 224 [2023-11-21 21:05:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:05:06,115 INFO L225 Difference]: With dead ends: 34039 [2023-11-21 21:05:06,115 INFO L226 Difference]: Without dead ends: 19451 [2023-11-21 21:05:06,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:06,127 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 153 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 21:05:06,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 42 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 21:05:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2023-11-21 21:05:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 19451. [2023-11-21 21:05:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19451 states, 19450 states have (on average 1.2337789203084832) internal successors, (23997), 19450 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states 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 21:05:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19451 states to 19451 states and 23997 transitions. [2023-11-21 21:05:06,478 INFO L78 Accepts]: Start accepts. Automaton has 19451 states and 23997 transitions. Word has length 224 [2023-11-21 21:05:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:05:06,478 INFO L495 AbstractCegarLoop]: Abstraction has 19451 states and 23997 transitions. [2023-11-21 21:05:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 21:05:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19451 states and 23997 transitions. [2023-11-21 21:05:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-21 21:05:06,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:05:06,493 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:06,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 21:05:06,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:05:06,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1658479693, now seen corresponding path program 1 times [2023-11-21 21:05:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:06,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312808065] [2023-11-21 21:05:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:05:06,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:06,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312808065] [2023-11-21 21:05:06,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312808065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:06,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:06,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:05:06,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887844457] [2023-11-21 21:05:06,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:06,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:05:06,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:06,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:05:06,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:05:06,962 INFO L87 Difference]: Start difference. First operand 19451 states and 23997 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 21:05:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:05:08,134 INFO L93 Difference]: Finished difference Result 51058 states and 62967 transitions. [2023-11-21 21:05:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:05:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 243 [2023-11-21 21:05:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:05:08,201 INFO L225 Difference]: With dead ends: 51058 [2023-11-21 21:05:08,202 INFO L226 Difference]: Without dead ends: 32037 [2023-11-21 21:05:08,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:05:08,222 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 578 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 21:05:08,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 8 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 21:05:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32037 states. [2023-11-21 21:05:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32037 to 30176. [2023-11-21 21:05:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30176 states, 30175 states have (on average 1.2393703396851699) internal successors, (37398), 30175 states have internal predecessors, (37398), 0 states have call successors, (0), 0 states 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 21:05:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30176 states to 30176 states and 37398 transitions. [2023-11-21 21:05:08,937 INFO L78 Accepts]: Start accepts. Automaton has 30176 states and 37398 transitions. Word has length 243 [2023-11-21 21:05:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:05:08,938 INFO L495 AbstractCegarLoop]: Abstraction has 30176 states and 37398 transitions. [2023-11-21 21:05:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 21:05:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 30176 states and 37398 transitions. [2023-11-21 21:05:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-21 21:05:08,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:05:08,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:08,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 21:05:08,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:05:08,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1814530140, now seen corresponding path program 1 times [2023-11-21 21:05:08,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:08,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228977869] [2023-11-21 21:05:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:08,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-21 21:05:09,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228977869] [2023-11-21 21:05:09,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228977869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:05:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789959170] [2023-11-21 21:05:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:09,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:05:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:05:09,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:05:09,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cbfe313-90a6-4c6e-9268-3450def1407d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:05:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:10,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:05:10,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:05:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 99 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 21:05:10,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:05:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 18 proven. 99 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 21:05:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789959170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:05:10,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:05:10,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-21 21:05:10,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886070880] [2023-11-21 21:05:10,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:05:10,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:05:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:05:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:05:10,942 INFO L87 Difference]: Start difference. First operand 30176 states and 37398 transitions. Second operand has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 21:05:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:05:15,579 INFO L93 Difference]: Finished difference Result 102111 states and 126852 transitions. [2023-11-21 21:05:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:05:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 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 249 [2023-11-21 21:05:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:05:15,698 INFO L225 Difference]: With dead ends: 102111 [2023-11-21 21:05:15,698 INFO L226 Difference]: Without dead ends: 72365 [2023-11-21 21:05:15,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:05:15,728 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1678 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-21 21:05:15,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 72 Invalid, 3228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-21 21:05:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72365 states.