./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:04,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:04,464 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:08:04,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:04,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:04,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:04,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:04,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:04,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:04,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:04,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:04,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:04,502 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:04,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:04,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:08:04,503 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:04,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:04,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:04,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:04,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:08:04,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:04,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:08:04,508 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:04,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:08:04,509 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:04,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:04,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:04,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:04,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:04,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:04,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:04,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:08:04,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:04,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:04,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:04,515 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:08:04,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:04,516 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:04,516 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:04,516 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_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 [2023-11-06 23:08:04,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:04,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:04,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:04,848 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:04,848 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:04,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2023-11-06 23:08:07,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:08,213 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:08,214 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2023-11-06 23:08:08,223 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/data/66524471b/57908c12792f4300993e829fff29f83f/FLAG25f998e21 [2023-11-06 23:08:08,242 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/data/66524471b/57908c12792f4300993e829fff29f83f [2023-11-06 23:08:08,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:08,251 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:08,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:08,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:08,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:08,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c0d9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08, skipping insertion in model container [2023-11-06 23:08:08,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:08,435 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_995225a6-10dd-47d9-98d3-21f7ce976e3b/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2023-11-06 23:08:08,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:08,466 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:08,479 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_995225a6-10dd-47d9-98d3-21f7ce976e3b/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2023-11-06 23:08:08,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:08,504 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:08,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08 WrapperNode [2023-11-06 23:08:08,504 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:08,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:08,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:08,506 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:08,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,522 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,541 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-11-06 23:08:08,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:08,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:08,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:08,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:08,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,568 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,569 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:08,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:08,573 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:08,573 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:08,574 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (1/1) ... [2023-11-06 23:08:08,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:08,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:08,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:08,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:08:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:08:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:08:08,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:08:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:08:08,754 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:08,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:08,928 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:08,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:08,935 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:08:08,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:08 BoogieIcfgContainer [2023-11-06 23:08:08,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:08,940 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:08,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:08,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:08,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:08" (1/3) ... [2023-11-06 23:08:08,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e28d2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:08, skipping insertion in model container [2023-11-06 23:08:08,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:08" (2/3) ... [2023-11-06 23:08:08,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e28d2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:08, skipping insertion in model container [2023-11-06 23:08:08,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:08" (3/3) ... [2023-11-06 23:08:08,947 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2023-11-06 23:08:08,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:08,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:08:09,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:09,030 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=LoopsAndPotentialCycles, 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;@7eaae774, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:09,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:08:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:08:09,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:09,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:09,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:09,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2023-11-06 23:08:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:09,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851161453] [2023-11-06 23:08:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:09,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:09,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851161453] [2023-11-06 23:08:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851161453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:09,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:09,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103914822] [2023-11-06 23:08:09,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:09,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:08:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:08:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:09,311 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:09,327 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-06 23:08:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:08:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-06 23:08:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:09,337 INFO L225 Difference]: With dead ends: 41 [2023-11-06 23:08:09,337 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 23:08:09,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:09,343 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:09,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 23:08:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 23:08:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-06 23:08:09,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2023-11-06 23:08:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:09,378 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-06 23:08:09,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-06 23:08:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:08:09,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:09,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:09,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:08:09,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:09,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2023-11-06 23:08:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:09,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118918334] [2023-11-06 23:08:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:09,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:09,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:09,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118918334] [2023-11-06 23:08:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118918334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:09,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:09,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070006513] [2023-11-06 23:08:09,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:09,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:09,637 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:09,697 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-11-06 23:08:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-06 23:08:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:09,699 INFO L225 Difference]: With dead ends: 45 [2023-11-06 23:08:09,699 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 23:08:09,699 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 [2023-11-06 23:08:09,701 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:09,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 23:08:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2023-11-06 23:08:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-06 23:08:09,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2023-11-06 23:08:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:09,708 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-06 23:08:09,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-06 23:08:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:08:09,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:09,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:09,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:08:09,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:09,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2023-11-06 23:08:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:09,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145303006] [2023-11-06 23:08:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:09,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:10,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:10,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145303006] [2023-11-06 23:08:10,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145303006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:10,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:10,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:10,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85439738] [2023-11-06 23:08:10,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:10,097 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:10,180 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2023-11-06 23:08:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-06 23:08:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:10,182 INFO L225 Difference]: With dead ends: 45 [2023-11-06 23:08:10,182 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 23:08:10,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:08:10,184 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:10,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:08:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 23:08:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2023-11-06 23:08:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-06 23:08:10,196 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2023-11-06 23:08:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:10,197 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-06 23:08:10,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-06 23:08:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:08:10,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:10,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:10,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:08:10,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:10,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2129460565, now seen corresponding path program 1 times [2023-11-06 23:08:10,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:10,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771108151] [2023-11-06 23:08:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:10,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:10,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771108151] [2023-11-06 23:08:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771108151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:10,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:10,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589107091] [2023-11-06 23:08:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:10,379 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:10,428 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-06 23:08:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-06 23:08:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:10,430 INFO L225 Difference]: With dead ends: 30 [2023-11-06 23:08:10,431 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 23:08:10,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:10,443 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:10,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 23:08:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 23:08:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-06 23:08:10,456 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2023-11-06 23:08:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:10,456 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-06 23:08:10,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-06 23:08:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:08:10,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:10,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:08:10,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:10,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2129520147, now seen corresponding path program 1 times [2023-11-06 23:08:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091044697] [2023-11-06 23:08:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:10,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091044697] [2023-11-06 23:08:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091044697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:10,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:10,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:08:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000767480] [2023-11-06 23:08:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:10,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:10,619 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:10,681 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-11-06 23:08:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:08:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-06 23:08:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:10,684 INFO L225 Difference]: With dead ends: 36 [2023-11-06 23:08:10,685 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 23:08:10,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:08:10,690 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:10,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 23:08:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-06 23:08:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-06 23:08:10,697 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 16 [2023-11-06 23:08:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:10,697 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-06 23:08:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-06 23:08:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 23:08:10,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:10,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:10,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:08:10,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:10,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -593145504, now seen corresponding path program 1 times [2023-11-06 23:08:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920521588] [2023-11-06 23:08:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:10,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:10,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920521588] [2023-11-06 23:08:10,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920521588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606082755] [2023-11-06 23:08:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:10,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:10,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:10,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:10,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:08:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:10,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:08:10,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:11,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:11,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606082755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:11,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 23:08:11,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161017694] [2023-11-06 23:08:11,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:11,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:08:11,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:08:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:08:11,136 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:11,272 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2023-11-06 23:08:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:08:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-06 23:08:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:11,283 INFO L225 Difference]: With dead ends: 123 [2023-11-06 23:08:11,284 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 23:08:11,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:08:11,286 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:11,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 43 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:08:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 23:08:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 46. [2023-11-06 23:08:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-11-06 23:08:11,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 22 [2023-11-06 23:08:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:11,303 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-11-06 23:08:11,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-11-06 23:08:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 23:08:11,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:11,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:11,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:08:11,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:11,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1836734985, now seen corresponding path program 1 times [2023-11-06 23:08:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:11,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88304710] [2023-11-06 23:08:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:11,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:11,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:08:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959953414] [2023-11-06 23:08:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:11,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:11,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:11,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:08:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:11,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:08:11,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:08:11,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:11,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88304710] [2023-11-06 23:08:11,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:08:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959953414] [2023-11-06 23:08:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959953414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:11,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:11,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:11,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704400490] [2023-11-06 23:08:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:11,695 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:11,728 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2023-11-06 23:08:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 23:08:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:11,730 INFO L225 Difference]: With dead ends: 109 [2023-11-06 23:08:11,730 INFO L226 Difference]: Without dead ends: 79 [2023-11-06 23:08:11,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:11,731 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:11,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-06 23:08:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2023-11-06 23:08:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-11-06 23:08:11,745 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 37 [2023-11-06 23:08:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:11,746 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-11-06 23:08:11,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-11-06 23:08:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 23:08:11,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:11,749 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:11,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:11,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:08:11,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:11,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash 467241801, now seen corresponding path program 1 times [2023-11-06 23:08:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:11,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316619989] [2023-11-06 23:08:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:11,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:08:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316619989] [2023-11-06 23:08:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316619989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:12,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:12,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 23:08:12,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699770841] [2023-11-06 23:08:12,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:12,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:08:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:12,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:08:12,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:08:12,280 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:12,379 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2023-11-06 23:08:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:08:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 23:08:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:12,381 INFO L225 Difference]: With dead ends: 113 [2023-11-06 23:08:12,381 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 23:08:12,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:08:12,382 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:12,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:08:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 23:08:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2023-11-06 23:08:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-11-06 23:08:12,393 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 37 [2023-11-06 23:08:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:12,394 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-11-06 23:08:12,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-11-06 23:08:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 23:08:12,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:12,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:12,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:08:12,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:12,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash -350406649, now seen corresponding path program 2 times [2023-11-06 23:08:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:12,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685101727] [2023-11-06 23:08:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:12,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 23:08:12,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685101727] [2023-11-06 23:08:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685101727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454174636] [2023-11-06 23:08:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:12,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:12,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:08:12,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:12,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:12,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:12,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:12,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:13,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454174636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:13,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:13,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-06 23:08:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525848086] [2023-11-06 23:08:13,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:08:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:08:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:08:13,035 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:13,553 INFO L93 Difference]: Finished difference Result 385 states and 472 transitions. [2023-11-06 23:08:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:08:13,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 23:08:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:13,555 INFO L225 Difference]: With dead ends: 385 [2023-11-06 23:08:13,556 INFO L226 Difference]: Without dead ends: 336 [2023-11-06 23:08:13,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:08:13,558 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 282 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:13,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 145 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-06 23:08:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 155. [2023-11-06 23:08:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2023-11-06 23:08:13,592 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 37 [2023-11-06 23:08:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:13,592 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2023-11-06 23:08:13,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2023-11-06 23:08:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 23:08:13,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:13,600 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:13,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:13,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:13,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:13,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1890253811, now seen corresponding path program 3 times [2023-11-06 23:08:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:13,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787412555] [2023-11-06 23:08:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 160 proven. 8 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-06 23:08:14,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787412555] [2023-11-06 23:08:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787412555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605480729] [2023-11-06 23:08:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:14,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:14,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:14,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:08:14,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:08:14,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:14,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:08:14,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:14,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:08:14,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-11-06 23:08:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-11-06 23:08:14,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-11-06 23:08:14,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605480729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:14,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:14,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-11-06 23:08:14,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359043243] [2023-11-06 23:08:14,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:14,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:08:14,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:08:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:08:14,897 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:15,343 INFO L93 Difference]: Finished difference Result 278 states and 325 transitions. [2023-11-06 23:08:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:08:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 23:08:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:15,346 INFO L225 Difference]: With dead ends: 278 [2023-11-06 23:08:15,346 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 23:08:15,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=950, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:08:15,348 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 290 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:15,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 108 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:08:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 23:08:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 108. [2023-11-06 23:08:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 107 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2023-11-06 23:08:15,361 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 67 [2023-11-06 23:08:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:15,361 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2023-11-06 23:08:15,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2023-11-06 23:08:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 23:08:15,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:15,363 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:15,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 23:08:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:08:15,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:15,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -573175961, now seen corresponding path program 2 times [2023-11-06 23:08:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234666465] [2023-11-06 23:08:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:15,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:08:15,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736070853] [2023-11-06 23:08:15,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:15,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:15,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:15,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:15,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:08:15,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:15,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:15,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:16,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234666465] [2023-11-06 23:08:16,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:08:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736070853] [2023-11-06 23:08:16,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736070853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:16,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:16,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-06 23:08:16,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138606824] [2023-11-06 23:08:16,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:08:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:08:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:08:16,372 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:17,076 INFO L93 Difference]: Finished difference Result 696 states and 825 transitions. [2023-11-06 23:08:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:08:17,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 23:08:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:17,081 INFO L225 Difference]: With dead ends: 696 [2023-11-06 23:08:17,081 INFO L226 Difference]: Without dead ends: 621 [2023-11-06 23:08:17,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:08:17,083 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 743 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:17,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 199 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:08:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-11-06 23:08:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 210. [2023-11-06 23:08:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 209 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 237 transitions. [2023-11-06 23:08:17,103 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 237 transitions. Word has length 67 [2023-11-06 23:08:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:17,103 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 237 transitions. [2023-11-06 23:08:17,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 237 transitions. [2023-11-06 23:08:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 23:08:17,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:17,105 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:17,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:17,311 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:17,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash -314647257, now seen corresponding path program 3 times [2023-11-06 23:08:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:17,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851863230] [2023-11-06 23:08:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:17,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:08:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833821262] [2023-11-06 23:08:17,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:17,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:17,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:17,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:08:17,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-06 23:08:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:17,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:08:17,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 613 proven. 319 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-11-06 23:08:18,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 932 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-11-06 23:08:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:18,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851863230] [2023-11-06 23:08:18,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:08:18,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833821262] [2023-11-06 23:08:18,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833821262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:18,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:18,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-11-06 23:08:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151383217] [2023-11-06 23:08:18,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:18,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:08:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:08:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=594, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:08:18,817 INFO L87 Difference]: Start difference. First operand 210 states and 237 transitions. Second operand has 32 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:21,318 INFO L93 Difference]: Finished difference Result 1882 states and 2267 transitions. [2023-11-06 23:08:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-06 23:08:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 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 127 [2023-11-06 23:08:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:21,330 INFO L225 Difference]: With dead ends: 1882 [2023-11-06 23:08:21,330 INFO L226 Difference]: Without dead ends: 1861 [2023-11-06 23:08:21,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3082, Invalid=5474, Unknown=0, NotChecked=0, Total=8556 [2023-11-06 23:08:21,335 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 844 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:21,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 255 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:08:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2023-11-06 23:08:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 432. [2023-11-06 23:08:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.1809744779582367) internal successors, (509), 431 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2023-11-06 23:08:21,391 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 127 [2023-11-06 23:08:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:21,391 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2023-11-06 23:08:21,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2023-11-06 23:08:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-06 23:08:21,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:21,394 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:21,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:21,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:21,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:21,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1490439733, now seen corresponding path program 2 times [2023-11-06 23:08:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:21,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797525292] [2023-11-06 23:08:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:21,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:23,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:23,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797525292] [2023-11-06 23:08:23,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797525292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:23,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011139142] [2023-11-06 23:08:23,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:23,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:23,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:08:23,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:23,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:08:23,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:24,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:25,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011139142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:25,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:25,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 78 [2023-11-06 23:08:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321991630] [2023-11-06 23:08:25,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:25,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-06 23:08:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-06 23:08:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=3455, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 23:08:25,566 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 79 states, 79 states have (on average 4.822784810126582) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:28,990 INFO L93 Difference]: Finished difference Result 6229 states and 7420 transitions. [2023-11-06 23:08:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 23:08:28,991 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.822784810126582) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 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 137 [2023-11-06 23:08:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:29,021 INFO L225 Difference]: With dead ends: 6229 [2023-11-06 23:08:29,021 INFO L226 Difference]: Without dead ends: 5853 [2023-11-06 23:08:29,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3797 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4082, Invalid=6630, Unknown=0, NotChecked=0, Total=10712 [2023-11-06 23:08:29,031 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2166 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:29,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2166 Valid, 568 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:08:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2023-11-06 23:08:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 587. [2023-11-06 23:08:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.18259385665529) internal successors, (693), 586 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 693 transitions. [2023-11-06 23:08:29,173 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 693 transitions. Word has length 137 [2023-11-06 23:08:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:29,173 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 693 transitions. [2023-11-06 23:08:29,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.822784810126582) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 693 transitions. [2023-11-06 23:08:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-06 23:08:29,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:29,179 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:29,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:29,386 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:29,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash -214224921, now seen corresponding path program 4 times [2023-11-06 23:08:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:29,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553514435] [2023-11-06 23:08:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:29,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:08:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285566529] [2023-11-06 23:08:29,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:29,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:29,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:29,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:29,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:08:30,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:30,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 23:08:30,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:33,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:36,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553514435] [2023-11-06 23:08:36,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:08:36,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285566529] [2023-11-06 23:08:36,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285566529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:36,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:36,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2023-11-06 23:08:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142414763] [2023-11-06 23:08:36,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-06 23:08:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-06 23:08:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 23:08:36,652 INFO L87 Difference]: Start difference. First operand 587 states and 693 transitions. Second operand has 106 states, 106 states have (on average 4.89622641509434) internal successors, (519), 105 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:48,581 INFO L93 Difference]: Finished difference Result 16704 states and 20014 transitions. [2023-11-06 23:08:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-06 23:08:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 4.89622641509434) internal successors, (519), 105 states have internal predecessors, (519), 0 states have call successors, (0), 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 267 [2023-11-06 23:08:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:48,653 INFO L225 Difference]: With dead ends: 16704 [2023-11-06 23:08:48,653 INFO L226 Difference]: Without dead ends: 16253 [2023-11-06 23:08:48,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10869, Invalid=13623, Unknown=0, NotChecked=0, Total=24492 [2023-11-06 23:08:48,666 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4988 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4988 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:48,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4988 Valid, 881 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 23:08:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16253 states. [2023-11-06 23:08:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16253 to 1029. [2023-11-06 23:08:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.154669260700389) internal successors, (1187), 1028 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1187 transitions. [2023-11-06 23:08:49,323 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1187 transitions. Word has length 267 [2023-11-06 23:08:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:49,323 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1187 transitions. [2023-11-06 23:08:49,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 4.89622641509434) internal successors, (519), 105 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1187 transitions. [2023-11-06 23:08:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-06 23:08:49,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:49,336 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 101, 101, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:49,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:49,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:08:49,548 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:49,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash 253570599, now seen corresponding path program 5 times [2023-11-06 23:08:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:49,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840826240] [2023-11-06 23:08:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:49,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:49,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:08:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478133611] [2023-11-06 23:08:49,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:49,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:49,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:49,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995225a6-10dd-47d9-98d3-21f7ce976e3b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process