./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/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_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/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_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/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 be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:07:19,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:07:19,606 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:07:19,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:07:19,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:07:19,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:07:19,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:07:19,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:07:19,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:07:19,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:07:19,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:07:19,677 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:07:19,678 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:07:19,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:07:19,680 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:07:19,681 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:07:19,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:07:19,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:07:19,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:07:19,682 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:07:19,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:07:19,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:07:19,684 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:07:19,684 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:07:19,685 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:07:19,686 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:07:19,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:07:19,687 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:07:19,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:19,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:07:19,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:07:19,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:07:19,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:07:19,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:07:19,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:07:19,690 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:07:19,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:07:19,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:07:19,691 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:07:19,691 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_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e [2023-11-06 23:07:20,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:07:20,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:07:20,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:07:20,048 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:07:20,048 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:07:20,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-crafted/zero_sum_const1.c [2023-11-06 23:07:23,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:07:23,363 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:07:23,363 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/sv-benchmarks/c/array-crafted/zero_sum_const1.c [2023-11-06 23:07:23,375 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/data/bb3537c26/27669a78a9b340c885f6eae8b2594436/FLAGc4e884b13 [2023-11-06 23:07:23,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/data/bb3537c26/27669a78a9b340c885f6eae8b2594436 [2023-11-06 23:07:23,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:07:23,414 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:07:23,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:23,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:07:23,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:07:23,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419de76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23, skipping insertion in model container [2023-11-06 23:07:23,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:23,665 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_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2023-11-06 23:07:23,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:23,700 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:07:23,715 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_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2023-11-06 23:07:23,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:23,742 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:07:23,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23 WrapperNode [2023-11-06 23:07:23,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:23,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:23,745 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:07:23,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:07:23,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,791 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-06 23:07:23,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:23,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:07:23,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:07:23,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:07:23,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:07:23,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:07:23,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:07:23,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:07:23,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (1/1) ... [2023-11-06 23:07:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:23,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:07:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:07:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:07:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:07:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:07:23,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:07:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:07:24,053 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:07:24,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:07:24,324 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:07:24,331 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:07:24,331 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:07:24,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:24 BoogieIcfgContainer [2023-11-06 23:07:24,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:07:24,337 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:07:24,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:07:24,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:07:24,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:07:23" (1/3) ... [2023-11-06 23:07:24,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4078a4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:24, skipping insertion in model container [2023-11-06 23:07:24,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:23" (2/3) ... [2023-11-06 23:07:24,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4078a4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:24, skipping insertion in model container [2023-11-06 23:07:24,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:24" (3/3) ... [2023-11-06 23:07:24,348 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2023-11-06 23:07:24,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:07:24,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:07:24,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:24,453 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;@4615fe2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:24,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:07:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:07:24,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:24,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:24,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:24,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2023-11-06 23:07:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:24,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528530526] [2023-11-06 23:07:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:24,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:24,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528530526] [2023-11-06 23:07:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528530526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:24,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:24,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:07:24,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054186580] [2023-11-06 23:07:24,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:24,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:07:24,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:07:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:07:24,700 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:24,718 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-11-06 23:07:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:07:24,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 23:07:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:24,729 INFO L225 Difference]: With dead ends: 35 [2023-11-06 23:07:24,729 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 23:07:24,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:07:24,736 INFO L413 NwaCegarLoop]: 23 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, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:24,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:07:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 23:07:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-06 23:07:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-06 23:07:24,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-11-06 23:07:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:24,775 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-06 23:07:24,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-06 23:07:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:07:24,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:24,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:07:24,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:24,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2023-11-06 23:07:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315002750] [2023-11-06 23:07:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315002750] [2023-11-06 23:07:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315002750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:07:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8541923] [2023-11-06 23:07:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:24,908 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:24,947 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-06 23:07:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 23:07:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:24,949 INFO L225 Difference]: With dead ends: 27 [2023-11-06 23:07:24,949 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 23:07:24,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:24,952 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:24,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:07:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 23:07:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-06 23:07:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 23:07:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-06 23:07:24,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-11-06 23:07:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:24,960 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-06 23:07:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-06 23:07:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 23:07:24,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:24,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:07:24,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:24,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2023-11-06 23:07:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:24,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177877427] [2023-11-06 23:07:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:07:25,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177877427] [2023-11-06 23:07:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177877427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:25,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:07:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169174320] [2023-11-06 23:07:25,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:07:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:07:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:07:25,085 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:25,135 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-06 23:07:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:07:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:07:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:25,138 INFO L225 Difference]: With dead ends: 28 [2023-11-06 23:07:25,138 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 23:07:25,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:07:25,140 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:25,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:07:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 23:07:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-06 23:07:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 23:07:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-06 23:07:25,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-11-06 23:07:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:25,149 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-06 23:07:25,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-06 23:07:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 23:07:25,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:25,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:25,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:07:25,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:25,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:25,153 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2023-11-06 23:07:25,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:25,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864883030] [2023-11-06 23:07:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:25,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:07:25,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:25,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864883030] [2023-11-06 23:07:25,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864883030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450705591] [2023-11-06 23:07:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:25,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:25,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:07:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:25,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:07:25,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:07:25,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:07:25,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450705591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:25,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 23:07:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625959700] [2023-11-06 23:07:25,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:25,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:07:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:07:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:07:25,629 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:25,687 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-11-06 23:07:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:07:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 23:07:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:25,688 INFO L225 Difference]: With dead ends: 33 [2023-11-06 23:07:25,688 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 23:07:25,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:07:25,691 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:25,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:07:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 23:07:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-06 23:07:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-06 23:07:25,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2023-11-06 23:07:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:25,697 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-06 23:07:25,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-06 23:07:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 23:07:25,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:25,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:25,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:25,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:25,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:25,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2023-11-06 23:07:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:25,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583672871] [2023-11-06 23:07:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:07:26,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583672871] [2023-11-06 23:07:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583672871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085193667] [2023-11-06 23:07:26,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:26,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:26,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:26,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:26,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:07:26,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:26,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:07:26,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:07:26,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:07:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085193667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:26,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 23:07:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93542599] [2023-11-06 23:07:26,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:26,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:07:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:07:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:07:26,278 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:26,364 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-11-06 23:07:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:07:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 23:07:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:26,366 INFO L225 Difference]: With dead ends: 35 [2023-11-06 23:07:26,367 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 23:07:26,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:07:26,370 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:26,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:07:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 23:07:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-06 23:07:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-06 23:07:26,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-11-06 23:07:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:26,378 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-06 23:07:26,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-06 23:07:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 23:07:26,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:26,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:26,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:26,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:26,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:26,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2023-11-06 23:07:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212410665] [2023-11-06 23:07:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:26,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212410665] [2023-11-06 23:07:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212410665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143431331] [2023-11-06 23:07:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:27,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:27,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:07:27,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:07:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:27,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 23:07:27,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:27,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:07:28,430 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:28,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-06 23:07:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:28,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:36,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-06 23:07:36,487 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:36,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-11-06 23:07:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:36,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143431331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:36,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:36,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 48 [2023-11-06 23:07:36,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304558789] [2023-11-06 23:07:36,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:36,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 23:07:36,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 23:07:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1989, Unknown=3, NotChecked=0, Total=2256 [2023-11-06 23:07:36,930 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:40,822 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-11-06 23:07:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 23:07:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 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 23 [2023-11-06 23:07:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:40,824 INFO L225 Difference]: With dead ends: 60 [2023-11-06 23:07:40,824 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 23:07:40,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=790, Invalid=5849, Unknown=3, NotChecked=0, Total=6642 [2023-11-06 23:07:40,829 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:40,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 68 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:07:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 23:07:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2023-11-06 23:07:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-06 23:07:40,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2023-11-06 23:07:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:40,841 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-06 23:07:40,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-06 23:07:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 23:07:40,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:40,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:40,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:41,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:41,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:41,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2023-11-06 23:07:41,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:41,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038282091] [2023-11-06 23:07:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:07:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038282091] [2023-11-06 23:07:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038282091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531599062] [2023-11-06 23:07:41,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:07:41,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:41,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:41,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:07:41,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:07:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:41,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:41,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:07:41,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:07:41,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531599062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:41,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 23:07:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158420914] [2023-11-06 23:07:41,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:41,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:07:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:07:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:07:41,468 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 23:07:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:41,664 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-11-06 23:07:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:07:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 25 [2023-11-06 23:07:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:41,665 INFO L225 Difference]: With dead ends: 62 [2023-11-06 23:07:41,665 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 23:07:41,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:07:41,667 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:41,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:07:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 23:07:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-11-06 23:07:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-06 23:07:41,676 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2023-11-06 23:07:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:41,676 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-06 23:07:41,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 23:07:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-06 23:07:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 23:07:41,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:41,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:41,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:41,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:41,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:41,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 5 times [2023-11-06 23:07:41,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:41,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794228771] [2023-11-06 23:07:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:41,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:07:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:42,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794228771] [2023-11-06 23:07:42,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794228771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:42,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514646442] [2023-11-06 23:07:42,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:07:42,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:42,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:42,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:07:42,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:07:42,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:42,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:07:42,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:07:42,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:07:42,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514646442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:42,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:42,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 23:07:42,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720770948] [2023-11-06 23:07:42,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:42,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:07:42,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:42,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:07:42,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:07:42,294 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 23:07:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:42,508 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-11-06 23:07:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:07:42,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 27 [2023-11-06 23:07:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:42,510 INFO L225 Difference]: With dead ends: 36 [2023-11-06 23:07:42,510 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 23:07:42,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:07:42,511 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:42,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:07:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 23:07:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-11-06 23:07:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-11-06 23:07:42,525 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2023-11-06 23:07:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:42,526 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-11-06 23:07:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 23:07:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-11-06 23:07:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:07:42,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:42,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:42,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:42,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:07:42,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:42,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2023-11-06 23:07:42,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:42,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563767692] [2023-11-06 23:07:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:42,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:44,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:44,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563767692] [2023-11-06 23:07:44,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563767692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:44,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577953491] [2023-11-06 23:07:44,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:07:44,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:44,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:44,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:44,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:07:44,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 23:07:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:44,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:07:44,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:44,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:07:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:45,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:57,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-06 23:07:57,266 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:07:57,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 23:07:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577953491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:57,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:57,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 48 [2023-11-06 23:07:57,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71689190] [2023-11-06 23:07:57,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:57,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 23:07:57,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 23:07:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2030, Unknown=6, NotChecked=0, Total=2256 [2023-11-06 23:07:57,581 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 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 23:07:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:59,948 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2023-11-06 23:07:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 23:07:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 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 29 [2023-11-06 23:07:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:59,950 INFO L225 Difference]: With dead ends: 53 [2023-11-06 23:07:59,950 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 23:07:59,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=432, Invalid=3852, Unknown=6, NotChecked=0, Total=4290 [2023-11-06 23:07:59,953 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:59,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:07:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 23:07:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2023-11-06 23:07:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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 23:07:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-06 23:07:59,964 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2023-11-06 23:07:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:59,965 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-06 23:07:59,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 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 23:07:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-06 23:07:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 23:07:59,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:59,966 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:59,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:00,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:00,174 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:00,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2023-11-06 23:08:00,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:00,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535767664] [2023-11-06 23:08:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:00,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:08:00,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535767664] [2023-11-06 23:08:00,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535767664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277119787] [2023-11-06 23:08:00,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:00,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:00,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:00,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:08:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:00,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:00,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:08:00,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:08:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277119787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:00,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-06 23:08:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876460435] [2023-11-06 23:08:00,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:00,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:08:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:08:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:08:00,637 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:00,853 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-11-06 23:08:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:08:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-06 23:08:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:00,854 INFO L225 Difference]: With dead ends: 74 [2023-11-06 23:08:00,854 INFO L226 Difference]: Without dead ends: 43 [2023-11-06 23:08:00,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:08:00,856 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:00,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 32 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-06 23:08:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2023-11-06 23:08:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-11-06 23:08:00,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2023-11-06 23:08:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:00,869 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-11-06 23:08:00,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-11-06 23:08:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 23:08:00,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:00,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:00,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:01,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:08:01,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:01,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1551752238, now seen corresponding path program 8 times [2023-11-06 23:08:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:01,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221286412] [2023-11-06 23:08:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:01,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:01,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:01,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221286412] [2023-11-06 23:08:01,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221286412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:01,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970502387] [2023-11-06 23:08:01,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:01,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:01,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:08:01,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:01,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:01,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:01,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970502387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:01,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:01,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-06 23:08:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707877054] [2023-11-06 23:08:01,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:08:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:08:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:08:01,697 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:01,953 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-11-06 23:08:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:08:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-06 23:08:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:01,955 INFO L225 Difference]: With dead ends: 42 [2023-11-06 23:08:01,955 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 23:08:01,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:08:01,956 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:01,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 23:08:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-06 23:08:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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 23:08:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-06 23:08:01,971 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2023-11-06 23:08:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:01,972 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-06 23:08:01,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-06 23:08:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 23:08:01,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:01,975 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:01,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:02,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:08:02,182 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:02,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2023-11-06 23:08:02,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:02,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990060527] [2023-11-06 23:08:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:02,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:04,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:04,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990060527] [2023-11-06 23:08:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990060527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:04,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653843090] [2023-11-06 23:08:04,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:04,658 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:04,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:08:04,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 23:08:04,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:04,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 23:08:04,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:06,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:06,116 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:06,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 39 [2023-11-06 23:08:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:08:06,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:07,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:07,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-06 23:08:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:08:07,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653843090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:07,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:07,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 21] total 65 [2023-11-06 23:08:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184469573] [2023-11-06 23:08:07,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:07,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-06 23:08:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-06 23:08:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3849, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 23:08:07,970 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 65 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:12,095 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-11-06 23:08:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:08:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 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 35 [2023-11-06 23:08:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:12,097 INFO L225 Difference]: With dead ends: 55 [2023-11-06 23:08:12,097 INFO L226 Difference]: Without dead ends: 51 [2023-11-06 23:08:12,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=777, Invalid=8535, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 23:08:12,102 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:12,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 81 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:08:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-06 23:08:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2023-11-06 23:08:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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 23:08:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-06 23:08:12,116 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2023-11-06 23:08:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:12,117 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-06 23:08:12,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-06 23:08:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 23:08:12,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:12,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:12,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:12,322 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:12,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2023-11-06 23:08:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:12,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472636261] [2023-11-06 23:08:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472636261] [2023-11-06 23:08:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472636261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837873737] [2023-11-06 23:08:12,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:12,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:12,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:12,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:08:12,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:12,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:12,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:08:12,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:12,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837873737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:12,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:12,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-06 23:08:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025302110] [2023-11-06 23:08:12,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:12,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:08:12,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:08:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:08:12,933 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:13,171 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2023-11-06 23:08:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:08:13,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 23:08:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:13,172 INFO L225 Difference]: With dead ends: 86 [2023-11-06 23:08:13,172 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 23:08:13,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:08:13,174 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:13,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 23:08:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2023-11-06 23:08:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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 23:08:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-06 23:08:13,189 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2023-11-06 23:08:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:13,189 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-06 23:08:13,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-06 23:08:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 23:08:13,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:13,191 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:13,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:13,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:13,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 11 times [2023-11-06 23:08:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574491557] [2023-11-06 23:08:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:13,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:13,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574491557] [2023-11-06 23:08:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574491557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011632729] [2023-11-06 23:08:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:13,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:13,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:13,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:13,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:08:13,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-06 23:08:13,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:13,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:08:13,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:13,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:14,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011632729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:14,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:14,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-06 23:08:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203559774] [2023-11-06 23:08:14,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:14,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:08:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:08:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:08:14,084 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:14,411 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-11-06 23:08:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:08:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 23:08:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:14,413 INFO L225 Difference]: With dead ends: 48 [2023-11-06 23:08:14,413 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 23:08:14,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:08:14,414 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:14,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 20 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 23:08:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-06 23:08:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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 23:08:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-11-06 23:08:14,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2023-11-06 23:08:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:14,433 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-11-06 23:08:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-11-06 23:08:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 23:08:14,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:14,436 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:14,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:08:14,642 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:14,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2023-11-06 23:08:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105417119] [2023-11-06 23:08:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:17,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:17,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105417119] [2023-11-06 23:08:17,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105417119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649498789] [2023-11-06 23:08:17,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:08:17,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:17,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:08:17,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-06 23:08:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:17,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 23:08:17,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:18,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:20,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:20,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-06 23:08:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:21,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:08:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649498789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:23,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:23,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 25] total 78 [2023-11-06 23:08:23,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629154288] [2023-11-06 23:08:23,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-06 23:08:23,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-06 23:08:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=5660, Unknown=1, NotChecked=0, Total=6006 [2023-11-06 23:08:23,896 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:29,528 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-11-06 23:08:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 23:08:29,529 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-06 23:08:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:29,529 INFO L225 Difference]: With dead ends: 63 [2023-11-06 23:08:29,529 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 23:08:29,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=807, Invalid=11624, Unknown=1, NotChecked=0, Total=12432 [2023-11-06 23:08:29,535 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:29,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 23:08:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 23:08:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-11-06 23:08:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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 23:08:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-11-06 23:08:29,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2023-11-06 23:08:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:29,551 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-11-06 23:08:29,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-11-06 23:08:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 23:08:29,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:29,552 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:29,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:29,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:08:29,757 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:29,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2023-11-06 23:08:29,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:29,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589536483] [2023-11-06 23:08:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:30,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589536483] [2023-11-06 23:08:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589536483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270738857] [2023-11-06 23:08:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:30,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:30,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:08:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:30,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:08:30,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:30,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:30,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270738857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:30,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:30,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-06 23:08:30,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071471325] [2023-11-06 23:08:30,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:30,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:08:30,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:08:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:08:30,602 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:30,908 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2023-11-06 23:08:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:08:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 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 43 [2023-11-06 23:08:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:30,909 INFO L225 Difference]: With dead ends: 98 [2023-11-06 23:08:30,910 INFO L226 Difference]: Without dead ends: 55 [2023-11-06 23:08:30,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:08:30,911 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:30,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 40 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-06 23:08:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2023-11-06 23:08:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-06 23:08:30,925 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2023-11-06 23:08:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:30,925 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-06 23:08:30,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-06 23:08:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 23:08:30,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:30,926 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:30,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:08:31,126 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:31,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1970943902, now seen corresponding path program 14 times [2023-11-06 23:08:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:31,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260819832] [2023-11-06 23:08:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:08:31,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:31,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260819832] [2023-11-06 23:08:31,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260819832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:31,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249530180] [2023-11-06 23:08:31,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:31,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:31,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:31,442 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:08:31,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:31,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:31,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:08:31,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:08:31,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:08:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249530180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:31,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:31,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-06 23:08:31,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249322854] [2023-11-06 23:08:31,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:31,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 23:08:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:31,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 23:08:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:08:31,994 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:32,389 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-11-06 23:08:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:08:32,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 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 45 [2023-11-06 23:08:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:32,391 INFO L225 Difference]: With dead ends: 54 [2023-11-06 23:08:32,391 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 23:08:32,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:08:32,393 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:32,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 23:08:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-06 23:08:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 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 23:08:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-11-06 23:08:32,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2023-11-06 23:08:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:32,423 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-11-06 23:08:32,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-11-06 23:08:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 23:08:32,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:32,424 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:32,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:08:32,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:32,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2023-11-06 23:08:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044427523] [2023-11-06 23:08:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:35,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:35,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044427523] [2023-11-06 23:08:35,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044427523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:35,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325693578] [2023-11-06 23:08:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:35,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:35,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:35,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:35,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:08:36,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 23:08:36,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:36,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-06 23:08:36,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:36,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:38,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:38,742 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:38,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 71 [2023-11-06 23:08:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:39,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:08:43,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325693578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:43,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:43,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 29] total 91 [2023-11-06 23:08:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434874139] [2023-11-06 23:08:43,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:43,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-06 23:08:43,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-06 23:08:43,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=7712, Unknown=0, NotChecked=0, Total=8190 [2023-11-06 23:08:43,019 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:51,697 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2023-11-06 23:08:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 23:08:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-06 23:08:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:51,698 INFO L225 Difference]: With dead ends: 70 [2023-11-06 23:08:51,698 INFO L226 Difference]: Without dead ends: 66 [2023-11-06 23:08:51,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1162, Invalid=16394, Unknown=0, NotChecked=0, Total=17556 [2023-11-06 23:08:51,701 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:51,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 132 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 23:08:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-06 23:08:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2023-11-06 23:08:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2023-11-06 23:08:51,723 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2023-11-06 23:08:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:51,724 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2023-11-06 23:08:51,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2023-11-06 23:08:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 23:08:51,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:51,725 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:51,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:08:51,932 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:51,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash 614114658, now seen corresponding path program 16 times [2023-11-06 23:08:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:51,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515241769] [2023-11-06 23:08:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:08:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515241769] [2023-11-06 23:08:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515241769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832903544] [2023-11-06 23:08:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:52,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:52,247 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:52,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:08:52,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:52,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:08:52,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:08:52,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:08:52,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832903544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:52,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:52,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-06 23:08:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724162504] [2023-11-06 23:08:52,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:52,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:08:52,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:08:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:08:52,731 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:53,087 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2023-11-06 23:08:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:08:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 49 [2023-11-06 23:08:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:53,089 INFO L225 Difference]: With dead ends: 110 [2023-11-06 23:08:53,089 INFO L226 Difference]: Without dead ends: 61 [2023-11-06 23:08:53,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:08:53,090 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:53,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 43 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-06 23:08:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2023-11-06 23:08:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-11-06 23:08:53,112 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2023-11-06 23:08:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:53,112 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-11-06 23:08:53,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-11-06 23:08:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 23:08:53,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:53,113 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:53,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 23:08:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:53,319 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:53,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2099294916, now seen corresponding path program 17 times [2023-11-06 23:08:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655590237] [2023-11-06 23:08:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:08:53,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:53,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655590237] [2023-11-06 23:08:53,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655590237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:53,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488071854] [2023-11-06 23:08:53,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:53,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:53,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:53,632 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:53,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:08:53,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-06 23:08:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:53,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:08:53,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:08:54,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:08:54,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488071854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:54,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:54,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-06 23:08:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328986785] [2023-11-06 23:08:54,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:54,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:08:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:08:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:08:54,225 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:54,569 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-11-06 23:08:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:08:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 51 [2023-11-06 23:08:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:54,571 INFO L225 Difference]: With dead ends: 60 [2023-11-06 23:08:54,571 INFO L226 Difference]: Without dead ends: 56 [2023-11-06 23:08:54,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:08:54,572 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:54,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 21 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:08:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-06 23:08:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-11-06 23:08:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-11-06 23:08:54,591 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2023-11-06 23:08:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:54,591 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-11-06 23:08:54,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-11-06 23:08:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 23:08:54,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:54,593 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:54,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:54,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:54,799 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:54,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:54,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981530, now seen corresponding path program 18 times [2023-11-06 23:08:54,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:54,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444816567] [2023-11-06 23:08:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:54,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:59,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444816567] [2023-11-06 23:08:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444816567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563595423] [2023-11-06 23:08:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:08:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:59,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:59,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:08:59,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-06 23:08:59,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:59,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-06 23:08:59,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:00,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 23:09:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:04,062 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:04,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 96 treesize of output 168 [2023-11-06 23:09:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:04,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:09,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563595423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:09,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:09,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 37, 33] total 108 [2023-11-06 23:09:09,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237546554] [2023-11-06 23:09:09,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-06 23:09:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-06 23:09:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=10892, Unknown=0, NotChecked=0, Total=11556 [2023-11-06 23:09:09,904 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 108 states, 108 states have (on average 1.212962962962963) internal successors, (131), 108 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:23,458 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2023-11-06 23:09:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 23:09:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.212962962962963) internal successors, (131), 108 states have internal predecessors, (131), 0 states have call successors, (0), 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 53 [2023-11-06 23:09:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:23,459 INFO L225 Difference]: With dead ends: 79 [2023-11-06 23:09:23,459 INFO L226 Difference]: Without dead ends: 75 [2023-11-06 23:09:23,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4745 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1639, Invalid=24121, Unknown=0, NotChecked=0, Total=25760 [2023-11-06 23:09:23,463 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:23,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 140 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3061 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 23:09:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-06 23:09:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2023-11-06 23:09:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-11-06 23:09:23,489 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2023-11-06 23:09:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:23,489 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-11-06 23:09:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.212962962962963) internal successors, (131), 108 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-11-06 23:09:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 23:09:23,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:23,490 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:23,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:23,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:23,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1331487352, now seen corresponding path program 19 times [2023-11-06 23:09:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867979108] [2023-11-06 23:09:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:09:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867979108] [2023-11-06 23:09:24,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867979108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625312062] [2023-11-06 23:09:24,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:09:24,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:24,030 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:24,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:09:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:24,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:09:24,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:09:24,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:09:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625312062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:24,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-06 23:09:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320677346] [2023-11-06 23:09:24,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 23:09:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 23:09:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:09:24,617 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 23:09:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:24,945 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2023-11-06 23:09:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:09:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 55 [2023-11-06 23:09:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:24,947 INFO L225 Difference]: With dead ends: 122 [2023-11-06 23:09:24,947 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 23:09:24,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:09:24,948 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:24,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 34 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 23:09:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-11-06 23:09:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-11-06 23:09:24,968 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2023-11-06 23:09:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:24,968 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-11-06 23:09:24,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 23:09:24,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-11-06 23:09:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 23:09:24,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:24,969 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:24,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:25,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:25,174 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:25,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 147323242, now seen corresponding path program 20 times [2023-11-06 23:09:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142408423] [2023-11-06 23:09:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:09:25,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:25,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142408423] [2023-11-06 23:09:25,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142408423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:25,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194839777] [2023-11-06 23:09:25,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:25,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:25,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:25,539 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:25,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:09:25,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:25,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:25,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:09:25,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:09:25,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:09:26,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194839777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:26,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:26,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-06 23:09:26,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237765115] [2023-11-06 23:09:26,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:26,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 23:09:26,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:26,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 23:09:26,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:09:26,182 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 23:09:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:26,612 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2023-11-06 23:09:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:09:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 57 [2023-11-06 23:09:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:26,613 INFO L225 Difference]: With dead ends: 66 [2023-11-06 23:09:26,613 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 23:09:26,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 88 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:09:26,615 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:26,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 16 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 23:09:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2023-11-06 23:09:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-11-06 23:09:26,645 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2023-11-06 23:09:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:26,645 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-11-06 23:09:26,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 23:09:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-11-06 23:09:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 23:09:26,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:26,647 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:26,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:26,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:26,853 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:26,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash -103051892, now seen corresponding path program 21 times [2023-11-06 23:09:26,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:26,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234673104] [2023-11-06 23:09:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 1 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:33,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234673104] [2023-11-06 23:09:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234673104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:33,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294189575] [2023-11-06 23:09:33,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:09:33,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:33,656 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:33,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:09:33,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 23:09:33,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:33,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 23:09:33,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:34,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:09:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:38,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:38,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:38,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:38,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 58 treesize of output 93 [2023-11-06 23:09:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:38,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-06 23:09:45,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294189575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:45,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:45,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 48, 37] total 126 [2023-11-06 23:09:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471494685] [2023-11-06 23:09:45,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:45,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-11-06 23:09:45,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-11-06 23:09:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=14610, Unknown=0, NotChecked=0, Total=15750 [2023-11-06 23:09:45,569 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 126 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:07,574 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2023-11-06 23:10:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-06 23:10:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 126 states have internal predecessors, (152), 0 states have call successors, (0), 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 59 [2023-11-06 23:10:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:07,576 INFO L225 Difference]: With dead ends: 128 [2023-11-06 23:10:07,576 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 23:10:07,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11005 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=3371, Invalid=40939, Unknown=0, NotChecked=0, Total=44310 [2023-11-06 23:10:07,580 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 70 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 4453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 144 Invalid, 4453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 23:10:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 23:10:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 65. [2023-11-06 23:10:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-06 23:10:07,621 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2023-11-06 23:10:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:07,622 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-06 23:10:07,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 126 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-06 23:10:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 23:10:07,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:07,623 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:07,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:10:07,829 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:07,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash -195387090, now seen corresponding path program 22 times [2023-11-06 23:10:07,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:07,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442049573] [2023-11-06 23:10:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:10:08,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:08,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442049573] [2023-11-06 23:10:08,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442049573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:08,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283704362] [2023-11-06 23:10:08,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:08,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:08,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:08,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:10:08,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:08,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:08,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:10:08,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:10:08,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:10:08,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283704362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:08,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:08,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-06 23:10:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028038225] [2023-11-06 23:10:08,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:08,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:10:08,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:10:08,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:10:08,833 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:09,189 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2023-11-06 23:10:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:10:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-06 23:10:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:09,190 INFO L225 Difference]: With dead ends: 134 [2023-11-06 23:10:09,190 INFO L226 Difference]: Without dead ends: 73 [2023-11-06 23:10:09,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 23:10:09,194 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:09,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 44 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:10:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-06 23:10:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2023-11-06 23:10:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2023-11-06 23:10:09,222 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2023-11-06 23:10:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:09,222 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2023-11-06 23:10:09,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2023-11-06 23:10:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:10:09,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:09,223 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:09,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:09,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:10:09,424 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:09,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2104585104, now seen corresponding path program 23 times [2023-11-06 23:10:09,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:09,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981966138] [2023-11-06 23:10:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:09,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:10:09,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:09,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981966138] [2023-11-06 23:10:09,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981966138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:09,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705103109] [2023-11-06 23:10:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:10:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:09,822 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:09,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:10:10,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-06 23:10:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:10,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:10:10,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:10:10,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:10:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705103109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:10,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-06 23:10:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214957254] [2023-11-06 23:10:10,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:10,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:10:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:10:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:10:10,726 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:11,265 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-11-06 23:10:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:10:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-06 23:10:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:11,267 INFO L225 Difference]: With dead ends: 72 [2023-11-06 23:10:11,267 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 23:10:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 99 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 23:10:11,268 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 28 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 23:10:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-11-06 23:10:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-11-06 23:10:11,299 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2023-11-06 23:10:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:11,299 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-06 23:10:11,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-11-06 23:10:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 23:10:11,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:11,300 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:11,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:11,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:10:11,500 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:11,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:11,501 INFO L85 PathProgramCache]: Analyzing trace with hash -370078158, now seen corresponding path program 24 times [2023-11-06 23:10:11,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:11,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036767179] [2023-11-06 23:10:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:11,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:19,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:19,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036767179] [2023-11-06 23:10:19,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036767179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:19,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726572385] [2023-11-06 23:10:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:10:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:19,822 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:10:20,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-06 23:10:20,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:20,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 23:10:20,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:20,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:10:20,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:10:26,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:26,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:26,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 39 [2023-11-06 23:10:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 17 proven. 162 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:10:26,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-06 23:10:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726572385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:36,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:36,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 44, 41] total 134 [2023-11-06 23:10:36,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674443130] [2023-11-06 23:10:36,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:36,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-11-06 23:10:36,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-11-06 23:10:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=17093, Unknown=0, NotChecked=0, Total=17822 [2023-11-06 23:10:36,797 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 134 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:54,863 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2023-11-06 23:10:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-06 23:10:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-06 23:10:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:54,865 INFO L225 Difference]: With dead ends: 94 [2023-11-06 23:10:54,865 INFO L226 Difference]: Without dead ends: 90 [2023-11-06 23:10:54,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6848 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1725, Invalid=35717, Unknown=0, NotChecked=0, Total=37442 [2023-11-06 23:10:54,866 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 5178 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:54,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 172 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5178 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-06 23:10:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-06 23:10:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2023-11-06 23:10:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2023-11-06 23:10:54,902 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2023-11-06 23:10:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:54,902 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2023-11-06 23:10:54,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2023-11-06 23:10:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 23:10:54,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:54,903 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:54,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:55,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:10:55,103 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:55,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:55,104 INFO L85 PathProgramCache]: Analyzing trace with hash 890409044, now seen corresponding path program 25 times [2023-11-06 23:10:55,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:55,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429847172] [2023-11-06 23:10:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:55,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:10:55,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:55,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429847172] [2023-11-06 23:10:55,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429847172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689850353] [2023-11-06 23:10:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:10:55,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:55,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:55,502 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:55,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:10:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:55,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:10:55,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:10:56,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 23:10:56,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689850353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:56,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:56,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-06 23:10:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761348091] [2023-11-06 23:10:56,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:56,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:10:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:56,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:10:56,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:10:56,311 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:56,747 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2023-11-06 23:10:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:10:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 23:10:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:56,748 INFO L225 Difference]: With dead ends: 146 [2023-11-06 23:10:56,748 INFO L226 Difference]: Without dead ends: 79 [2023-11-06 23:10:56,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:10:56,750 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 155 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:56,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-06 23:10:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2023-11-06 23:10:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2023-11-06 23:10:56,796 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2023-11-06 23:10:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:56,797 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2023-11-06 23:10:56,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2023-11-06 23:10:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 23:10:56,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:56,797 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:56,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:10:56,998 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:56,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash 999713078, now seen corresponding path program 26 times [2023-11-06 23:10:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995078521] [2023-11-06 23:10:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:56,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:10:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995078521] [2023-11-06 23:10:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995078521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385631839] [2023-11-06 23:10:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:57,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:57,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:57,377 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:57,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:10:57,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:57,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:57,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:10:57,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:10:57,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:10:58,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385631839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:58,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:58,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-06 23:10:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498296842] [2023-11-06 23:10:58,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:58,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:10:58,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:58,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:10:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:10:58,261 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:59,000 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2023-11-06 23:10:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:10:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-06 23:10:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:59,001 INFO L225 Difference]: With dead ends: 78 [2023-11-06 23:10:59,001 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 23:10:59,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 106 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 23:10:59,003 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 144 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:59,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 33 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:10:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 23:10:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2023-11-06 23:10:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-11-06 23:10:59,039 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2023-11-06 23:10:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:59,040 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-11-06 23:10:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-11-06 23:10:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 23:10:59,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:59,041 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:59,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:59,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0c8aa1-de10-4bca-8d18-d3a3b84df49b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:10:59,241 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:59,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1295173032, now seen corresponding path program 27 times [2023-11-06 23:10:59,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:59,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382644513] [2023-11-06 23:10:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:59,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat