./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de61.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_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/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_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de61.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/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_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:48:09,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:48:09,573 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:48:09,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:48:09,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:48:09,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:48:09,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:48:09,606 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:48:09,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:48:09,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:48:09,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:48:09,609 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:48:09,609 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:48:09,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:48:09,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:48:09,611 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:48:09,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:48:09,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:48:09,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:48:09,614 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:48:09,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:48:09,615 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:48:09,615 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:48:09,616 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:48:09,617 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:48:09,617 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:48:09,618 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:48:09,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:48:09,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:48:09,619 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:48:09,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:48:09,620 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:48:09,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:48:09,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:48:09,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:48:09,622 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:48:09,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:48:09,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:48:09,623 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:48:09,623 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_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 [2023-11-06 22:48:09,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:48:09,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:48:09,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:48:09,890 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:48:09,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:48:09,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loops-crafted-1/in-de61.c [2023-11-06 22:48:13,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:48:13,365 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:48:13,365 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/sv-benchmarks/c/loops-crafted-1/in-de61.c [2023-11-06 22:48:13,372 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/data/ae3359388/95481c1a8cfa44e5b08658973c974877/FLAG1b168e75d [2023-11-06 22:48:13,385 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/data/ae3359388/95481c1a8cfa44e5b08658973c974877 [2023-11-06 22:48:13,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:48:13,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:48:13,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:48:13,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:48:13,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:48:13,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f26aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13, skipping insertion in model container [2023-11-06 22:48:13,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,419 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:48:13,563 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_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2023-11-06 22:48:13,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:48:13,594 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:48:13,607 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_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2023-11-06 22:48:13,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:48:13,629 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:48:13,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13 WrapperNode [2023-11-06 22:48:13,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:48:13,631 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:48:13,631 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:48:13,631 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:48:13,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,669 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-06 22:48:13,670 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:48:13,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:48:13,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:48:13,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:48:13,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,681 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:48:13,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:48:13,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:48:13,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:48:13,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2023-11-06 22:48:13,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:48:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:13,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:48:13,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:48:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:48:13,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:48:13,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:48:13,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:48:13,877 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:48:13,879 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:48:14,054 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:48:14,060 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:48:14,060 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:48:14,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:14 BoogieIcfgContainer [2023-11-06 22:48:14,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:48:14,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:48:14,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:48:14,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:48:14,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:13" (1/3) ... [2023-11-06 22:48:14,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a71e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:14, skipping insertion in model container [2023-11-06 22:48:14,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (2/3) ... [2023-11-06 22:48:14,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a71e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:14, skipping insertion in model container [2023-11-06 22:48:14,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:14" (3/3) ... [2023-11-06 22:48:14,074 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2023-11-06 22:48:14,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:48:14,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:48:14,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:48:14,148 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;@4f2fdf55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:48:14,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:48:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 22:48:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:48:14,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:14,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:14,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:14,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-11-06 22:48:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:14,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596311630] [2023-11-06 22:48:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:14,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:14,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596311630] [2023-11-06 22:48:14,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596311630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:14,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:14,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:48:14,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64289806] [2023-11-06 22:48:14,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:14,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:48:14,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:48:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:48:14,367 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 22:48:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:14,385 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-11-06 22:48:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:48:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-11-06 22:48:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:14,395 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:48:14,395 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 22:48:14,398 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 22:48:14,402 INFO L413 NwaCegarLoop]: 22 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, 22 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 22:48:14,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:48:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 22:48:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 22:48:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 22:48:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-11-06 22:48:14,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-11-06 22:48:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:14,436 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-11-06 22:48:14,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 22:48:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-11-06 22:48:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:48:14,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:14,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:14,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:48:14,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:14,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-11-06 22:48:14,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:14,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215931731] [2023-11-06 22:48:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:14,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:15,241 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 22:48:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215931731] [2023-11-06 22:48:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215931731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:48:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780781325] [2023-11-06 22:48:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:15,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:48:15,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:48:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:48:15,250 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 22:48:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:15,441 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2023-11-06 22:48:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:48:15,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-11-06 22:48:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:15,444 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:48:15,445 INFO L226 Difference]: Without dead ends: 14 [2023-11-06 22:48:15,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:48:15,454 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:15,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:48:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-06 22:48:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-06 22:48:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 22:48:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2023-11-06 22:48:15,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2023-11-06 22:48:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:15,473 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2023-11-06 22:48:15,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 22:48:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2023-11-06 22:48:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:48:15,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:15,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:15,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:48:15,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:15,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1427170164, now seen corresponding path program 1 times [2023-11-06 22:48:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:15,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678434884] [2023-11-06 22:48:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678434884] [2023-11-06 22:48:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678434884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112340139] [2023-11-06 22:48:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:15,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:15,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:15,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:48:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:15,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:48:15,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:15,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112340139] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:15,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 22:48:15,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045867422] [2023-11-06 22:48:15,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:48:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:48:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:48:15,950 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 22:48:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:16,201 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2023-11-06 22:48:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:48:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 13 [2023-11-06 22:48:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:16,205 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:48:16,205 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 22:48:16,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:48:16,207 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:16,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:48:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 22:48:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2023-11-06 22:48:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 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 22:48:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2023-11-06 22:48:16,219 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 13 [2023-11-06 22:48:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:16,220 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2023-11-06 22:48:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 22:48:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2023-11-06 22:48:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:48:16,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:16,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:16,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:48:16,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 22:48:16,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:16,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -603304611, now seen corresponding path program 1 times [2023-11-06 22:48:16,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315604683] [2023-11-06 22:48:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:16,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:16,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315604683] [2023-11-06 22:48:16,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315604683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:16,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743958439] [2023-11-06 22:48:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:16,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:16,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:16,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:16,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:48:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:16,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:16,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:16,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:16,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743958439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:16,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:16,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2023-11-06 22:48:16,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823978059] [2023-11-06 22:48:16,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:16,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:48:16,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:48:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:48:16,716 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 22:48:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:17,080 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2023-11-06 22:48:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:48:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 15 [2023-11-06 22:48:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:17,085 INFO L225 Difference]: With dead ends: 107 [2023-11-06 22:48:17,085 INFO L226 Difference]: Without dead ends: 87 [2023-11-06 22:48:17,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:48:17,089 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:17,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 95 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:48:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-06 22:48:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2023-11-06 22:48:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2023-11-06 22:48:17,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2023-11-06 22:48:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:17,122 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2023-11-06 22:48:17,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 22:48:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2023-11-06 22:48:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:48:17,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:17,126 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:17,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:48:17,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:17,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:17,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash 114935591, now seen corresponding path program 2 times [2023-11-06 22:48:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228734035] [2023-11-06 22:48:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:17,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:17,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228734035] [2023-11-06 22:48:17,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228734035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:17,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416493375] [2023-11-06 22:48:17,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:17,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:17,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:17,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:48:17,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:17,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:48:17,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:17,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:17,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416493375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:17,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:17,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-06 22:48:17,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824300196] [2023-11-06 22:48:17,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:17,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:48:17,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:17,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:48:17,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:48:17,806 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:48:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:19,082 INFO L93 Difference]: Finished difference Result 188 states and 307 transitions. [2023-11-06 22:48:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:48:19,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) Word has length 16 [2023-11-06 22:48:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:19,085 INFO L225 Difference]: With dead ends: 188 [2023-11-06 22:48:19,085 INFO L226 Difference]: Without dead ends: 174 [2023-11-06 22:48:19,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:48:19,087 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 305 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:19,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 169 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:48:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-06 22:48:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2023-11-06 22:48:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 105 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 22:48:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 157 transitions. [2023-11-06 22:48:19,125 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 157 transitions. Word has length 16 [2023-11-06 22:48:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:19,125 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 157 transitions. [2023-11-06 22:48:19,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:48:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 157 transitions. [2023-11-06 22:48:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:48:19,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:19,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:19,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:19,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:19,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-11-06 22:48:19,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:19,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741526788] [2023-11-06 22:48:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:19,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741526788] [2023-11-06 22:48:19,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741526788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:19,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779850529] [2023-11-06 22:48:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:19,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:19,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:19,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:19,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:48:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:19,935 WARN L260 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:48:19,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:20,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779850529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:20,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:20,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2023-11-06 22:48:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776278701] [2023-11-06 22:48:20,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:20,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:48:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:48:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:20,720 INFO L87 Difference]: Start difference. First operand 106 states and 157 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 22:48:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:23,207 INFO L93 Difference]: Finished difference Result 192 states and 265 transitions. [2023-11-06 22:48:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:48:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 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 18 [2023-11-06 22:48:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:23,209 INFO L225 Difference]: With dead ends: 192 [2023-11-06 22:48:23,209 INFO L226 Difference]: Without dead ends: 147 [2023-11-06 22:48:23,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:48:23,212 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 88 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:48:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-06 22:48:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2023-11-06 22:48:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.5542168674698795) internal successors, (129), 83 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 22:48:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 129 transitions. [2023-11-06 22:48:23,276 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 129 transitions. Word has length 18 [2023-11-06 22:48:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:23,277 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 129 transitions. [2023-11-06 22:48:23,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 22:48:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 129 transitions. [2023-11-06 22:48:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:48:23,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:23,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:23,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:48:23,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:23,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 748617255, now seen corresponding path program 2 times [2023-11-06 22:48:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856930842] [2023-11-06 22:48:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856930842] [2023-11-06 22:48:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856930842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95129680] [2023-11-06 22:48:23,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:23,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:23,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:48:23,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:23,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:23,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:48:23,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:48:23,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:48:23,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95129680] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:23,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:23,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-11-06 22:48:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78641620] [2023-11-06 22:48:23,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:23,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:48:23,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:48:23,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:48:23,935 INFO L87 Difference]: Start difference. First operand 84 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 22:48:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:24,679 INFO L93 Difference]: Finished difference Result 264 states and 385 transitions. [2023-11-06 22:48:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:48:24,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 18 [2023-11-06 22:48:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:24,681 INFO L225 Difference]: With dead ends: 264 [2023-11-06 22:48:24,681 INFO L226 Difference]: Without dead ends: 227 [2023-11-06 22:48:24,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:48:24,684 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:24,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 176 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:48:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-06 22:48:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 121. [2023-11-06 22:48:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.4833333333333334) internal successors, (178), 120 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 22:48:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 178 transitions. [2023-11-06 22:48:24,762 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 178 transitions. Word has length 18 [2023-11-06 22:48:24,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:24,762 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 178 transitions. [2023-11-06 22:48:24,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 22:48:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 178 transitions. [2023-11-06 22:48:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 22:48:24,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:24,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:24,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:24,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:24,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:24,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash 48319293, now seen corresponding path program 1 times [2023-11-06 22:48:24,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:24,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060732926] [2023-11-06 22:48:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:24,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:48:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060732926] [2023-11-06 22:48:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060732926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127134957] [2023-11-06 22:48:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:25,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:25,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:48:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:25,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:48:25,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:48:25,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 22:48:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127134957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:25,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:25,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-11-06 22:48:25,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033597311] [2023-11-06 22:48:25,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:25,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:48:25,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:48:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:48:25,249 INFO L87 Difference]: Start difference. First operand 121 states and 178 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 22:48:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:25,770 INFO L93 Difference]: Finished difference Result 209 states and 303 transitions. [2023-11-06 22:48:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:48:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 21 [2023-11-06 22:48:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:25,772 INFO L225 Difference]: With dead ends: 209 [2023-11-06 22:48:25,772 INFO L226 Difference]: Without dead ends: 173 [2023-11-06 22:48:25,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:48:25,775 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:25,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 145 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:48:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-06 22:48:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 129. [2023-11-06 22:48:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 22:48:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 189 transitions. [2023-11-06 22:48:25,855 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 189 transitions. Word has length 21 [2023-11-06 22:48:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:25,856 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 189 transitions. [2023-11-06 22:48:25,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 22:48:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 189 transitions. [2023-11-06 22:48:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 22:48:25,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:25,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:25,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:26,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:26,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:26,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:26,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1411583389, now seen corresponding path program 3 times [2023-11-06 22:48:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378504026] [2023-11-06 22:48:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:26,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378504026] [2023-11-06 22:48:26,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378504026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:26,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825067077] [2023-11-06 22:48:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:26,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:26,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:26,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:26,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:48:26,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:48:26,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:26,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:48:26,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:48:26,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:48:26,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825067077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:26,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:26,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-11-06 22:48:26,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446153863] [2023-11-06 22:48:26,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:26,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:48:26,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:48:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:48:26,581 INFO L87 Difference]: Start difference. First operand 129 states and 189 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 22:48:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:29,055 INFO L93 Difference]: Finished difference Result 400 states and 550 transitions. [2023-11-06 22:48:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-06 22:48:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2023-11-06 22:48:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:29,058 INFO L225 Difference]: With dead ends: 400 [2023-11-06 22:48:29,058 INFO L226 Difference]: Without dead ends: 364 [2023-11-06 22:48:29,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:48:29,062 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 282 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:29,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 232 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:48:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-06 22:48:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 153. [2023-11-06 22:48:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 22:48:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 225 transitions. [2023-11-06 22:48:29,137 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 225 transitions. Word has length 21 [2023-11-06 22:48:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:29,137 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 225 transitions. [2023-11-06 22:48:29,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 22:48:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 225 transitions. [2023-11-06 22:48:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 22:48:29,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:29,139 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:29,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:29,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:29,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:29,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:29,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1195101891, now seen corresponding path program 2 times [2023-11-06 22:48:29,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:29,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894705246] [2023-11-06 22:48:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:29,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:48:29,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894705246] [2023-11-06 22:48:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894705246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129243937] [2023-11-06 22:48:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:29,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:29,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:48:29,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:29,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:48:29,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:48:29,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-06 22:48:29,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129243937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:29,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:29,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 4] total 13 [2023-11-06 22:48:29,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900799850] [2023-11-06 22:48:29,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:29,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:48:29,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:48:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:48:29,685 INFO L87 Difference]: Start difference. First operand 153 states and 225 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:30,507 INFO L93 Difference]: Finished difference Result 305 states and 460 transitions. [2023-11-06 22:48:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:48:30,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-06 22:48:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:30,509 INFO L225 Difference]: With dead ends: 305 [2023-11-06 22:48:30,509 INFO L226 Difference]: Without dead ends: 281 [2023-11-06 22:48:30,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:48:30,512 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:30,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 254 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:48:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-06 22:48:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 200. [2023-11-06 22:48:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4723618090452262) internal successors, (293), 199 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 22:48:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 293 transitions. [2023-11-06 22:48:30,632 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 293 transitions. Word has length 21 [2023-11-06 22:48:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:30,633 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 293 transitions. [2023-11-06 22:48:30,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 293 transitions. [2023-11-06 22:48:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:48:30,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:30,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:30,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:30,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:48:30,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:30,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1372519271, now seen corresponding path program 2 times [2023-11-06 22:48:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:30,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824060516] [2023-11-06 22:48:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:30,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:48:30,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:30,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824060516] [2023-11-06 22:48:30,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824060516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:30,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39602131] [2023-11-06 22:48:30,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:30,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:30,964 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:30,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:48:31,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:31,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:31,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:48:31,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:48:31,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:48:31,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39602131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:31,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:31,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-06 22:48:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803936756] [2023-11-06 22:48:31,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:48:31,109 INFO L87 Difference]: Start difference. First operand 200 states and 293 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 22:48:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:31,419 INFO L93 Difference]: Finished difference Result 306 states and 429 transitions. [2023-11-06 22:48:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:48:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 22:48:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:31,422 INFO L225 Difference]: With dead ends: 306 [2023-11-06 22:48:31,422 INFO L226 Difference]: Without dead ends: 293 [2023-11-06 22:48:31,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:48:31,425 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:31,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 74 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:48:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-06 22:48:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 211. [2023-11-06 22:48:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4428571428571428) internal successors, (303), 210 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 22:48:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 303 transitions. [2023-11-06 22:48:31,584 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 303 transitions. Word has length 22 [2023-11-06 22:48:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:31,584 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 303 transitions. [2023-11-06 22:48:31,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 22:48:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 303 transitions. [2023-11-06 22:48:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:48:31,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:31,586 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:31,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 22:48:31,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:48:31,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:31,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1486463737, now seen corresponding path program 3 times [2023-11-06 22:48:31,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387094130] [2023-11-06 22:48:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:31,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387094130] [2023-11-06 22:48:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387094130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:32,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032420926] [2023-11-06 22:48:32,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:32,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:32,038 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:32,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:48:32,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:48:32,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:32,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:48:32,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:32,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032420926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:32,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-06 22:48:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540037245] [2023-11-06 22:48:32,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:32,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:48:32,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:48:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:48:32,547 INFO L87 Difference]: Start difference. First operand 211 states and 303 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 22:48:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:55,678 INFO L93 Difference]: Finished difference Result 735 states and 1189 transitions. [2023-11-06 22:48:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 22:48:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 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 22:48:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:55,684 INFO L225 Difference]: With dead ends: 735 [2023-11-06 22:48:55,684 INFO L226 Difference]: Without dead ends: 680 [2023-11-06 22:48:55,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1363, Invalid=3059, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 22:48:55,688 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1049 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:55,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 688 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:48:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-11-06 22:48:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 324. [2023-11-06 22:48:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.498452012383901) internal successors, (484), 323 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 22:48:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 484 transitions. [2023-11-06 22:48:55,926 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 484 transitions. Word has length 22 [2023-11-06 22:48:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:55,926 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 484 transitions. [2023-11-06 22:48:55,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 22:48:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 484 transitions. [2023-11-06 22:48:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:48:55,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:55,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:55,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:48:56,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:56,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -11866489, now seen corresponding path program 3 times [2023-11-06 22:48:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908766457] [2023-11-06 22:48:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:48:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908766457] [2023-11-06 22:48:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908766457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424892602] [2023-11-06 22:48:56,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:56,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:56,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:56,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:48:57,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:48:57,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:57,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:48:57,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:57,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:58,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424892602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:58,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:58,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 15] total 36 [2023-11-06 22:48:58,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202238964] [2023-11-06 22:48:58,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:48:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:48:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:48:58,516 INFO L87 Difference]: Start difference. First operand 324 states and 484 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 22:49:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:01,502 INFO L93 Difference]: Finished difference Result 467 states and 661 transitions. [2023-11-06 22:49:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:49:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 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 24 [2023-11-06 22:49:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:01,507 INFO L225 Difference]: With dead ends: 467 [2023-11-06 22:49:01,507 INFO L226 Difference]: Without dead ends: 378 [2023-11-06 22:49:01,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=567, Invalid=2855, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:49:01,514 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:01,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 216 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:49:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-06 22:49:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 307. [2023-11-06 22:49:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.477124183006536) internal successors, (452), 306 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 22:49:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 452 transitions. [2023-11-06 22:49:01,728 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 452 transitions. Word has length 24 [2023-11-06 22:49:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:01,729 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 452 transitions. [2023-11-06 22:49:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 22:49:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 452 transitions. [2023-11-06 22:49:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:49:01,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:01,730 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:01,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:01,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:01,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:01,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -147642777, now seen corresponding path program 4 times [2023-11-06 22:49:01,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:01,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831253013] [2023-11-06 22:49:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:01,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:02,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831253013] [2023-11-06 22:49:02,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831253013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:02,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045312843] [2023-11-06 22:49:02,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:49:02,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:02,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:02,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:02,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:49:02,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:49:02,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:02,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:49:02,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:49:02,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:49:02,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045312843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:02,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:02,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-11-06 22:49:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205172010] [2023-11-06 22:49:02,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:02,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:49:02,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:49:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:49:02,559 INFO L87 Difference]: Start difference. First operand 307 states and 452 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 22:49:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:08,157 INFO L93 Difference]: Finished difference Result 853 states and 1203 transitions. [2023-11-06 22:49:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-06 22:49:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-06 22:49:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:08,163 INFO L225 Difference]: With dead ends: 853 [2023-11-06 22:49:08,163 INFO L226 Difference]: Without dead ends: 779 [2023-11-06 22:49:08,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3717 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 22:49:08,167 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 416 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:08,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 338 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:49:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-11-06 22:49:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 355. [2023-11-06 22:49:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.4887005649717515) internal successors, (527), 354 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 22:49:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 527 transitions. [2023-11-06 22:49:08,422 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 527 transitions. Word has length 24 [2023-11-06 22:49:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:08,422 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 527 transitions. [2023-11-06 22:49:08,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 22:49:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 527 transitions. [2023-11-06 22:49:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 22:49:08,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:08,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:08,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:49:08,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:08,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 4 times [2023-11-06 22:49:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633809968] [2023-11-06 22:49:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:49:08,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:08,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633809968] [2023-11-06 22:49:08,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633809968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:08,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627642715] [2023-11-06 22:49:08,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:49:08,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:08,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:08,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:49:08,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:49:08,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:08,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:49:08,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:49:08,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:49:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627642715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:09,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-11-06 22:49:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889147317] [2023-11-06 22:49:09,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:09,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:49:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:49:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:49:09,060 INFO L87 Difference]: Start difference. First operand 355 states and 527 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 22:49:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:09,817 INFO L93 Difference]: Finished difference Result 594 states and 849 transitions. [2023-11-06 22:49:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:49:09,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 26 [2023-11-06 22:49:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:09,826 INFO L225 Difference]: With dead ends: 594 [2023-11-06 22:49:09,827 INFO L226 Difference]: Without dead ends: 571 [2023-11-06 22:49:09,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:49:09,828 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:09,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 207 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:49:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-11-06 22:49:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 356. [2023-11-06 22:49:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.4788732394366197) internal successors, (525), 355 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 22:49:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 525 transitions. [2023-11-06 22:49:10,099 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 525 transitions. Word has length 26 [2023-11-06 22:49:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:10,099 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 525 transitions. [2023-11-06 22:49:10,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 22:49:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 525 transitions. [2023-11-06 22:49:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:49:10,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:10,100 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:10,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:10,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:49:10,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:10,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash -833380899, now seen corresponding path program 5 times [2023-11-06 22:49:10,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:10,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73072667] [2023-11-06 22:49:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:10,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:10,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73072667] [2023-11-06 22:49:10,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73072667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993540418] [2023-11-06 22:49:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:49:10,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:10,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:10,573 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:10,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:49:10,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:49:10,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:10,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:49:10,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:10,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:49:10,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993540418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:10,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:10,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 21 [2023-11-06 22:49:10,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757320166] [2023-11-06 22:49:10,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:10,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:49:10,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:49:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:49:10,918 INFO L87 Difference]: Start difference. First operand 356 states and 525 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 22:49:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:14,187 INFO L93 Difference]: Finished difference Result 1048 states and 1526 transitions. [2023-11-06 22:49:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-06 22:49:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 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 27 [2023-11-06 22:49:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:14,194 INFO L225 Difference]: With dead ends: 1048 [2023-11-06 22:49:14,195 INFO L226 Difference]: Without dead ends: 971 [2023-11-06 22:49:14,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=910, Invalid=3920, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 22:49:14,198 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 439 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:14,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 455 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:49:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-11-06 22:49:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 424. [2023-11-06 22:49:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4869976359338062) internal successors, (629), 423 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 22:49:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 629 transitions. [2023-11-06 22:49:14,599 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 629 transitions. Word has length 27 [2023-11-06 22:49:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:14,599 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 629 transitions. [2023-11-06 22:49:14,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 22:49:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 629 transitions. [2023-11-06 22:49:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:49:14,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:14,601 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:14,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 22:49:14,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:49:14,806 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:14,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash 83199046, now seen corresponding path program 5 times [2023-11-06 22:49:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:14,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231254496] [2023-11-06 22:49:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:49:15,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231254496] [2023-11-06 22:49:15,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231254496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65205609] [2023-11-06 22:49:15,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:49:15,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:15,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:15,071 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:15,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:49:15,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-06 22:49:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:49:15,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:49:15,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:49:15,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:49:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65205609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:15,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-11-06 22:49:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814435354] [2023-11-06 22:49:15,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:49:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:49:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:49:15,827 INFO L87 Difference]: Start difference. First operand 424 states and 629 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 22:50:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:53,171 INFO L93 Difference]: Finished difference Result 1134 states and 1792 transitions. [2023-11-06 22:50:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-11-06 22:50:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 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 28 [2023-11-06 22:50:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:53,178 INFO L225 Difference]: With dead ends: 1134 [2023-11-06 22:50:53,178 INFO L226 Difference]: Without dead ends: 1000 [2023-11-06 22:50:53,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6738 ImplicationChecksByTransitivity, 88.7s TimeCoverageRelationStatistics Valid=4719, Invalid=13103, Unknown=0, NotChecked=0, Total=17822 [2023-11-06 22:50:53,184 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1390 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:53,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 862 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-11-06 22:50:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-11-06 22:50:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 500. [2023-11-06 22:50:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.4929859719438878) internal successors, (745), 499 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 22:50:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 745 transitions. [2023-11-06 22:50:53,720 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 745 transitions. Word has length 28 [2023-11-06 22:50:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:53,720 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 745 transitions. [2023-11-06 22:50:53,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 22:50:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 745 transitions. [2023-11-06 22:50:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:50:53,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:53,722 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:53,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:50:53,933 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:53,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 796082573, now seen corresponding path program 6 times [2023-11-06 22:50:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:53,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299799532] [2023-11-06 22:50:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:50:54,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299799532] [2023-11-06 22:50:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299799532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551598432] [2023-11-06 22:50:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:50:54,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:54,206 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:50:54,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:50:54,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:54,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:50:54,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 22:50:54,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 22:50:54,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551598432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:54,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:54,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-11-06 22:50:54,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662313510] [2023-11-06 22:50:54,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:54,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:50:54,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:50:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:50:54,816 INFO L87 Difference]: Start difference. First operand 500 states and 745 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:04,606 INFO L93 Difference]: Finished difference Result 1139 states and 1620 transitions. [2023-11-06 22:51:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-06 22:51:04,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-06 22:51:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:04,613 INFO L225 Difference]: With dead ends: 1139 [2023-11-06 22:51:04,613 INFO L226 Difference]: Without dead ends: 1045 [2023-11-06 22:51:04,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2940 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=989, Invalid=8517, Unknown=0, NotChecked=0, Total=9506 [2023-11-06 22:51:04,618 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 519 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:04,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 443 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:51:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2023-11-06 22:51:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 529. [2023-11-06 22:51:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.4886363636363635) internal successors, (786), 528 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 22:51:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 786 transitions. [2023-11-06 22:51:05,187 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 786 transitions. Word has length 29 [2023-11-06 22:51:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:05,187 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 786 transitions. [2023-11-06 22:51:05,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 786 transitions. [2023-11-06 22:51:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:51:05,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:05,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:05,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:05,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:51:05,396 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:05,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 6 times [2023-11-06 22:51:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:05,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123424154] [2023-11-06 22:51:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:51:06,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:06,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123424154] [2023-11-06 22:51:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123424154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828647676] [2023-11-06 22:51:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:51:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:06,441 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:06,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:51:06,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:51:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:06,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 22:51:06,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:51:07,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:51:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828647676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:08,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:08,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 49 [2023-11-06 22:51:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305914515] [2023-11-06 22:51:08,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:51:08,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:51:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2019, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:51:08,581 INFO L87 Difference]: Start difference. First operand 529 states and 786 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:19,783 INFO L93 Difference]: Finished difference Result 964 states and 1300 transitions. [2023-11-06 22:51:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-06 22:51:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-06 22:51:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:19,788 INFO L225 Difference]: With dead ends: 964 [2023-11-06 22:51:19,788 INFO L226 Difference]: Without dead ends: 852 [2023-11-06 22:51:19,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1607, Invalid=10165, Unknown=0, NotChecked=0, Total=11772 [2023-11-06 22:51:19,789 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 342 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:19,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 420 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 22:51:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-11-06 22:51:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 522. [2023-11-06 22:51:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.4875239923224568) internal successors, (775), 521 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 22:51:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 775 transitions. [2023-11-06 22:51:20,381 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 775 transitions. Word has length 30 [2023-11-06 22:51:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:20,381 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 775 transitions. [2023-11-06 22:51:20,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 775 transitions. [2023-11-06 22:51:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:51:20,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:20,383 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:20,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:20,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:20,596 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:20,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1893940903, now seen corresponding path program 7 times [2023-11-06 22:51:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:20,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141652983] [2023-11-06 22:51:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:51:20,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141652983] [2023-11-06 22:51:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141652983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135662939] [2023-11-06 22:51:20,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:51:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:20,926 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:51:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:20,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:51:20,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:51:21,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:51:21,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135662939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:21,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:21,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-11-06 22:51:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652037198] [2023-11-06 22:51:21,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:51:21,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:51:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:51:21,520 INFO L87 Difference]: Start difference. First operand 522 states and 775 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 22:51:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:50,158 INFO L93 Difference]: Finished difference Result 1527 states and 2108 transitions. [2023-11-06 22:51:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2023-11-06 22:51:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2023-11-06 22:51:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:50,166 INFO L225 Difference]: With dead ends: 1527 [2023-11-06 22:51:50,166 INFO L226 Difference]: Without dead ends: 1457 [2023-11-06 22:51:50,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23403 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=3138, Invalid=54702, Unknown=0, NotChecked=0, Total=57840 [2023-11-06 22:51:50,171 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 909 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 3188 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 3188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:50,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 571 Invalid, 3818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 3188 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-06 22:51:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2023-11-06 22:51:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 576. [2023-11-06 22:51:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.4956521739130435) internal successors, (860), 575 states have internal predecessors, (860), 0 states have call successors, (0), 0 states 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 22:51:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 860 transitions. [2023-11-06 22:51:51,005 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 860 transitions. Word has length 30 [2023-11-06 22:51:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:51,006 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 860 transitions. [2023-11-06 22:51:51,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 22:51:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 860 transitions. [2023-11-06 22:51:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:51:51,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:51,008 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:51,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:51,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:51,224 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:51,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 7 times [2023-11-06 22:51:51,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:51,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276180011] [2023-11-06 22:51:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:51,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 22:51:51,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276180011] [2023-11-06 22:51:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276180011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246331111] [2023-11-06 22:51:51,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:51:51,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:51,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:51,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:51,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:51:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:51,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:51:51,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:51:51,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:51:51,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246331111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:51,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:51,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-11-06 22:51:51,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736749514] [2023-11-06 22:51:51,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:51:51,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:51:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:51:51,795 INFO L87 Difference]: Start difference. First operand 576 states and 860 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:54,439 INFO L93 Difference]: Finished difference Result 1065 states and 1511 transitions. [2023-11-06 22:51:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:51:54,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 22:51:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:54,444 INFO L225 Difference]: With dead ends: 1065 [2023-11-06 22:51:54,445 INFO L226 Difference]: Without dead ends: 1017 [2023-11-06 22:51:54,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:51:54,446 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 132 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:54,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 282 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:51:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2023-11-06 22:51:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 596. [2023-11-06 22:51:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 1.4705882352941178) internal successors, (875), 595 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 22:51:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 875 transitions. [2023-11-06 22:51:55,311 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 875 transitions. Word has length 32 [2023-11-06 22:51:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:55,311 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 875 transitions. [2023-11-06 22:51:55,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 875 transitions. [2023-11-06 22:51:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:51:55,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:55,313 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:55,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-06 22:51:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:55,513 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:55,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash -404867559, now seen corresponding path program 3 times [2023-11-06 22:51:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801759274] [2023-11-06 22:51:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-06 22:51:55,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:55,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801759274] [2023-11-06 22:51:55,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801759274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:55,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464974080] [2023-11-06 22:51:55,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:51:55,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:55,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:55,714 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:51:55,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:51:55,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:55,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:51:55,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-06 22:51:56,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-06 22:51:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464974080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:56,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 22 [2023-11-06 22:51:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782732810] [2023-11-06 22:51:56,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:56,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:51:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:51:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:51:56,194 INFO L87 Difference]: Start difference. First operand 596 states and 875 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:00,032 INFO L93 Difference]: Finished difference Result 866 states and 1247 transitions. [2023-11-06 22:52:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:52:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 22:52:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:00,038 INFO L225 Difference]: With dead ends: 866 [2023-11-06 22:52:00,038 INFO L226 Difference]: Without dead ends: 691 [2023-11-06 22:52:00,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=480, Invalid=4632, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 22:52:00,039 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 141 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:00,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 568 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:52:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-11-06 22:52:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 568. [2023-11-06 22:52:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.4532627865961198) internal successors, (824), 567 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 22:52:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 824 transitions. [2023-11-06 22:52:00,923 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 824 transitions. Word has length 32 [2023-11-06 22:52:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:00,923 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 824 transitions. [2023-11-06 22:52:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 824 transitions. [2023-11-06 22:52:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 22:52:00,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:00,925 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:00,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:01,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:01,131 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:01,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:01,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1396440605, now seen corresponding path program 8 times [2023-11-06 22:52:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:01,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134023271] [2023-11-06 22:52:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134023271] [2023-11-06 22:52:01,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134023271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912911612] [2023-11-06 22:52:01,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:01,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:01,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:01,550 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:01,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc2f7e7-0ddd-4c76-b1ab-35531b41113a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:52:01,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:01,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:52:01,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:52:01,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:52:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912911612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:02,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:02,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-11-06 22:52:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847775958] [2023-11-06 22:52:02,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:02,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:52:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:02,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:52:02,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:52:02,398 INFO L87 Difference]: Start difference. First operand 568 states and 824 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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)