./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i --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_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/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_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/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_d66ec973-ba47-4010-abb8-cab3eee00e38/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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:33,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:33,746 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:21:33,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:33,757 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:33,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:33,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:33,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:33,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:33,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:33,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:33,799 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:33,800 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:33,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:33,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:21:33,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:33,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:33,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:33,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:33,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:21:33,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:33,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:21:33,807 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:33,807 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:21:33,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:33,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:33,809 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:33,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:33,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:33,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:33,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:33,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:21:33,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:33,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:33,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:33,814 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:21:33,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:33,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:33,815 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:33,815 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_d66ec973-ba47-4010-abb8-cab3eee00e38/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2023-11-06 22:21:34,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:34,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:34,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:34,147 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:34,147 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:34,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2023-11-06 22:21:37,310 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:21:37,536 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:21:37,537 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2023-11-06 22:21:37,544 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/data/fac21c47d/42ae9c8c98f744fa8eb861690a990154/FLAGbd77ea7b5 [2023-11-06 22:21:37,559 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/data/fac21c47d/42ae9c8c98f744fa8eb861690a990154 [2023-11-06 22:21:37,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:21:37,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:21:37,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:37,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:21:37,578 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:21:37,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c17fba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37, skipping insertion in model container [2023-11-06 22:21:37,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:21:37,779 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_d66ec973-ba47-4010-abb8-cab3eee00e38/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2023-11-06 22:21:37,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:37,803 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:21:37,816 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_d66ec973-ba47-4010-abb8-cab3eee00e38/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2023-11-06 22:21:37,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:37,837 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:21:37,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37 WrapperNode [2023-11-06 22:21:37,838 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:37,839 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:37,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:21:37,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:21:37,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,873 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-11-06 22:21:37,873 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:37,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:21:37,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:21:37,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:21:37,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:21:37,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:21:37,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:21:37,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:21:37,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2023-11-06 22:21:37,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:37,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:21:37,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:21:37,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:21:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:21:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:21:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:21:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:21:37,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:21:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:21:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:21:38,041 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:21:38,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:21:38,205 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:21:38,211 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:21:38,211 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:21:38,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38 BoogieIcfgContainer [2023-11-06 22:21:38,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:21:38,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:21:38,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:21:38,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:21:38,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:37" (1/3) ... [2023-11-06 22:21:38,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f72638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:38, skipping insertion in model container [2023-11-06 22:21:38,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (2/3) ... [2023-11-06 22:21:38,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f72638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:38, skipping insertion in model container [2023-11-06 22:21:38,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38" (3/3) ... [2023-11-06 22:21:38,236 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2023-11-06 22:21:38,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:21:38,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:21:38,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:38,306 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;@5be90c06, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:38,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:21:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 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 22:21:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:21:38,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:38,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:38,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:38,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195572, now seen corresponding path program 1 times [2023-11-06 22:21:38,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:38,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92956298] [2023-11-06 22:21:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92956298] [2023-11-06 22:21:38,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92956298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:38,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:38,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:38,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372944835] [2023-11-06 22:21:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:38,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:38,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:38,730 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:38,787 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-11-06 22:21:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-06 22:21:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:38,798 INFO L225 Difference]: With dead ends: 32 [2023-11-06 22:21:38,798 INFO L226 Difference]: Without dead ends: 14 [2023-11-06 22:21:38,801 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 22:21:38,806 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:38,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:21:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-06 22:21:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-06 22:21:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 22:21:38,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-06 22:21:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:38,842 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 22:21:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 22:21:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:21:38,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:38,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:38,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:21:38,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:38,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1167602842, now seen corresponding path program 1 times [2023-11-06 22:21:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964983695] [2023-11-06 22:21:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:38,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:39,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:39,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964983695] [2023-11-06 22:21:39,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964983695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:39,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51755732] [2023-11-06 22:21:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:39,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:39,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:21:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:39,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:21:39,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:39,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:39,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51755732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:39,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:39,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:21:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705715988] [2023-11-06 22:21:39,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:21:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:21:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:21:39,239 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:39,279 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-06 22:21:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:21:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 22:21:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:39,281 INFO L225 Difference]: With dead ends: 27 [2023-11-06 22:21:39,281 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 22:21:39,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:21:39,284 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:39,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:21:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 22:21:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 22:21:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-06 22:21:39,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-11-06 22:21:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:39,292 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-06 22:21:39,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-06 22:21:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:21:39,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:39,294 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:39,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:39,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:39,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:39,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:39,502 INFO L85 PathProgramCache]: Analyzing trace with hash -356740832, now seen corresponding path program 2 times [2023-11-06 22:21:39,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:39,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035070677] [2023-11-06 22:21:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:39,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:21:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:39,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035070677] [2023-11-06 22:21:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035070677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:39,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:39,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:21:39,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821242215] [2023-11-06 22:21:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:39,852 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:39,902 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-06 22:21:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:21:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 22:21:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:39,906 INFO L225 Difference]: With dead ends: 25 [2023-11-06 22:21:39,908 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:21:39,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:21:39,911 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:39,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:21:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:21:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 22:21:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 22:21:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-06 22:21:39,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2023-11-06 22:21:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:39,927 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-06 22:21:39,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-06 22:21:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:21:39,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:39,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:39,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:21:39,930 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:39,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash 818118971, now seen corresponding path program 1 times [2023-11-06 22:21:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:39,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147073554] [2023-11-06 22:21:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:40,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:40,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147073554] [2023-11-06 22:21:40,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147073554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:40,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747200455] [2023-11-06 22:21:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:40,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:40,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:21:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:40,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:21:40,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:40,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:40,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747200455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:40,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:40,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:21:40,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846685557] [2023-11-06 22:21:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:40,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:21:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:21:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:21:40,439 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 22:21:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:40,517 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-11-06 22:21:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:21:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) Word has length 20 [2023-11-06 22:21:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:40,521 INFO L225 Difference]: With dead ends: 43 [2023-11-06 22:21:40,521 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:21:40,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:21:40,523 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:40,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:21:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 22:21:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-06 22:21:40,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 20 [2023-11-06 22:21:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:40,533 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-06 22:21:40,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 22:21:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-06 22:21:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:21:40,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:40,536 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:40,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:40,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:40,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:40,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1590358471, now seen corresponding path program 2 times [2023-11-06 22:21:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467051585] [2023-11-06 22:21:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:40,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:41,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467051585] [2023-11-06 22:21:41,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467051585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612714791] [2023-11-06 22:21:41,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:41,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:41,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:41,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:21:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:41,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:21:41,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:41,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612714791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:41,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:41,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 22:21:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211962032] [2023-11-06 22:21:41,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:21:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:21:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:21:41,580 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 22:21:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:41,681 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2023-11-06 22:21:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:21:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 32 [2023-11-06 22:21:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:41,684 INFO L225 Difference]: With dead ends: 67 [2023-11-06 22:21:41,684 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 22:21:41,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:21:41,686 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:41,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 22:21:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-06 22:21:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 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 22:21:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-11-06 22:21:41,701 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 32 [2023-11-06 22:21:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:41,702 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-11-06 22:21:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 22:21:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-11-06 22:21:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 22:21:41,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:41,706 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:41,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:41,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:41,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:41,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 838040799, now seen corresponding path program 3 times [2023-11-06 22:21:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:41,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119924667] [2023-11-06 22:21:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:21:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119924667] [2023-11-06 22:21:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119924667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694260305] [2023-11-06 22:21:42,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:21:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:42,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:42,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:21:42,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:21:42,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:42,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:21:42,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:42,957 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 11 [2023-11-06 22:21:43,009 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:21:43,010 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 23 treesize of output 15 [2023-11-06 22:21:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 22:21:43,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 22:21:43,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694260305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:43,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:43,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2023-11-06 22:21:43,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629588371] [2023-11-06 22:21:43,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:43,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:21:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:21:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:21:43,263 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 22:21:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:43,587 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2023-11-06 22:21:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:21:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 56 [2023-11-06 22:21:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:43,589 INFO L225 Difference]: With dead ends: 78 [2023-11-06 22:21:43,590 INFO L226 Difference]: Without dead ends: 64 [2023-11-06 22:21:43,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:21:43,592 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:43,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:21:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-06 22:21:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-11-06 22:21:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2023-11-06 22:21:43,602 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2023-11-06 22:21:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:43,603 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2023-11-06 22:21:43,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 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 22:21:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2023-11-06 22:21:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-06 22:21:43,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:43,605 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:43,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:21:43,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:43,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1482744023, now seen corresponding path program 4 times [2023-11-06 22:21:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:43,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110851013] [2023-11-06 22:21:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:21:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110851013] [2023-11-06 22:21:44,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110851013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592119091] [2023-11-06 22:21:44,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:21:44,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:44,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:21:44,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:21:44,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:44,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:21:44,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:21:44,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:21:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592119091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:45,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:45,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-11-06 22:21:45,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720392525] [2023-11-06 22:21:45,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:45,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 22:21:45,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 22:21:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:21:45,920 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:21:46,137 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2023-11-06 22:21:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 22:21:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 states have internal predecessors, (108), 0 states have call successors, (0), 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 62 [2023-11-06 22:21:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:21:46,145 INFO L225 Difference]: With dead ends: 127 [2023-11-06 22:21:46,146 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 22:21:46,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:21:46,149 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:21:46,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:21:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 22:21:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-06 22:21:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-11-06 22:21:46,175 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 62 [2023-11-06 22:21:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:21:46,177 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-11-06 22:21:46,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 51 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-11-06 22:21:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 22:21:46,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:21:46,187 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:46,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:46,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:21:46,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash -249885559, now seen corresponding path program 5 times [2023-11-06 22:21:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878480154] [2023-11-06 22:21:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:21:49,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878480154] [2023-11-06 22:21:49,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878480154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859647763] [2023-11-06 22:21:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:21:49,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:49,213 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:49,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:22:18,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-11-06 22:22:18,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:18,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:22:18,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:22:18,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:22:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859647763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:21,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:21,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-11-06 22:22:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094049108] [2023-11-06 22:22:21,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:21,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-06 22:22:21,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-06 22:22:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-06 22:22:21,981 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:22,417 INFO L93 Difference]: Finished difference Result 227 states and 278 transitions. [2023-11-06 22:22:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-06 22:22:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 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 112 [2023-11-06 22:22:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:22,420 INFO L225 Difference]: With dead ends: 227 [2023-11-06 22:22:22,420 INFO L226 Difference]: Without dead ends: 213 [2023-11-06 22:22:22,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-06 22:22:22,425 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:22,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:22:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-06 22:22:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-06 22:22:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2023-11-06 22:22:22,442 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 112 [2023-11-06 22:22:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:22,442 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2023-11-06 22:22:22,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2023-11-06 22:22:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-06 22:22:22,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:22,445 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:22,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:22,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:22,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:22,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1085123987, now seen corresponding path program 6 times [2023-11-06 22:22:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510091730] [2023-11-06 22:22:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:22,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:22:31,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510091730] [2023-11-06 22:22:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510091730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596577830] [2023-11-06 22:22:31,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:22:31,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:31,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:31,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:22:31,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 22:22:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:31,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:22:31,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:31,692 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 11 [2023-11-06 22:22:32,351 INFO L322 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-11-06 22:22:32,351 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 43 treesize of output 55 [2023-11-06 22:22:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-11-06 22:22:32,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-11-06 22:22:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596577830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:33,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:33,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 10, 10] total 117 [2023-11-06 22:22:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024174646] [2023-11-06 22:22:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-11-06 22:22:33,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-11-06 22:22:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5125, Invalid=8447, Unknown=0, NotChecked=0, Total=13572 [2023-11-06 22:22:33,836 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 117 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:36,014 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2023-11-06 22:22:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-06 22:22:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 117 states have internal predecessors, (234), 0 states have call successors, (0), 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 212 [2023-11-06 22:22:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:36,017 INFO L225 Difference]: With dead ends: 246 [2023-11-06 22:22:36,018 INFO L226 Difference]: Without dead ends: 224 [2023-11-06 22:22:36,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5251, Invalid=11005, Unknown=0, NotChecked=0, Total=16256 [2023-11-06 22:22:36,024 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:36,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:22:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-06 22:22:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2023-11-06 22:22:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2023-11-06 22:22:36,041 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 212 [2023-11-06 22:22:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:36,042 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2023-11-06 22:22:36,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 117 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2023-11-06 22:22:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-06 22:22:36,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:36,045 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:36,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:36,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:36,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:36,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash 71959387, now seen corresponding path program 7 times [2023-11-06 22:22:36,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:36,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662653511] [2023-11-06 22:22:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:22:44,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662653511] [2023-11-06 22:22:44,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662653511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783108341] [2023-11-06 22:22:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:22:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:44,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:44,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:22:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:44,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-06 22:22:44,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:22:44,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:22:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783108341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:58,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:58,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-11-06 22:22:58,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566011726] [2023-11-06 22:22:58,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:58,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-06 22:22:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-06 22:22:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-11-06 22:22:58,027 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 203 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:59,230 INFO L93 Difference]: Finished difference Result 447 states and 549 transitions. [2023-11-06 22:22:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-11-06 22:22:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 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 222 [2023-11-06 22:22:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:59,234 INFO L225 Difference]: With dead ends: 447 [2023-11-06 22:22:59,234 INFO L226 Difference]: Without dead ends: 425 [2023-11-06 22:22:59,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-11-06 22:22:59,239 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:59,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:22:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-06 22:22:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2023-11-06 22:22:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.0047169811320755) internal successors, (426), 424 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 426 transitions. [2023-11-06 22:22:59,260 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 426 transitions. Word has length 222 [2023-11-06 22:22:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:59,261 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 426 transitions. [2023-11-06 22:22:59,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 426 transitions. [2023-11-06 22:22:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2023-11-06 22:22:59,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:59,270 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:59,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:22:59,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:22:59,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:59,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1137683803, now seen corresponding path program 8 times [2023-11-06 22:22:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:59,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198132735] [2023-11-06 22:22:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:23:28,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:28,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198132735] [2023-11-06 22:23:28,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198132735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:28,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763092640] [2023-11-06 22:23:28,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:28,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:28,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:28,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:23:28,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:23:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:28,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 202 conjunts are in the unsatisfiable core [2023-11-06 22:23:28,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:23:29,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:24:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763092640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:20,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:24:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-11-06 22:24:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529692423] [2023-11-06 22:24:20,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-11-06 22:24:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-11-06 22:24:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-11-06 22:24:20,974 INFO L87 Difference]: Start difference. First operand 425 states and 426 transitions. Second operand has 405 states, 405 states have (on average 2.0148148148148146) internal successors, (816), 405 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:27,678 INFO L93 Difference]: Finished difference Result 851 states and 1054 transitions. [2023-11-06 22:24:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-11-06 22:24:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0148148148148146) internal successors, (816), 405 states have internal predecessors, (816), 0 states have call successors, (0), 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 424 [2023-11-06 22:24:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:27,684 INFO L225 Difference]: With dead ends: 851 [2023-11-06 22:24:27,684 INFO L226 Difference]: Without dead ends: 829 [2023-11-06 22:24:27,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 68.2s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-11-06 22:24:27,696 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:27,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:24:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-11-06 22:24:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2023-11-06 22:24:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 1.002415458937198) internal successors, (830), 828 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 830 transitions. [2023-11-06 22:24:27,730 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 830 transitions. Word has length 424 [2023-11-06 22:24:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:27,731 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 830 transitions. [2023-11-06 22:24:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0148148148148146) internal successors, (816), 405 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 830 transitions. [2023-11-06 22:24:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2023-11-06 22:24:27,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:27,762 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:27,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:27,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d66ec973-ba47-4010-abb8-cab3eee00e38/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:27,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:27,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:27,972 INFO L85 PathProgramCache]: Analyzing trace with hash 259883961, now seen corresponding path program 9 times [2023-11-06 22:24:27,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:27,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095983784] [2023-11-06 22:24:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat