./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:50,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:50,998 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:59:51,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:51,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:51,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:51,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:51,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:51,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:51,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:51,070 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:51,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:51,071 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:51,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:51,074 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:51,074 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:51,075 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:51,075 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:51,076 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:51,076 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:51,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:51,078 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:51,078 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:51,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:51,081 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:51,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:51,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:51,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:51,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:51,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:51,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:51,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:51,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:51,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:51,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:51,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:51,087 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:51,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:51,088 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:51,088 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_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 [2023-11-19 07:59:51,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:51,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:51,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:51,500 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:51,500 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:51,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-11-19 07:59:54,731 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:55,222 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:55,223 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-11-19 07:59:55,249 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/data/54cbb8756/e53fcc4bff304363bb5bfeb0f38377c2/FLAGfa706826c [2023-11-19 07:59:55,277 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/data/54cbb8756/e53fcc4bff304363bb5bfeb0f38377c2 [2023-11-19 07:59:55,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:55,288 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:55,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:55,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:55,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:55,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@466fcddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:55, skipping insertion in model container [2023-11-19 07:59:55,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:55" (1/1) ... [2023-11-19 07:59:55,403 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:56,181 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_77cf2377-cd3d-42f5-9fcd-1738854a1301/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2023-11-19 07:59:56,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:56,256 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:56,511 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_77cf2377-cd3d-42f5-9fcd-1738854a1301/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2023-11-19 07:59:56,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:56,550 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:56,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56 WrapperNode [2023-11-19 07:59:56,551 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:56,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:56,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:56,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:56,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,727 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-19 07:59:56,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:56,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:56,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:56,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:56,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:56,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:56,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:56,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:56,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (1/1) ... [2023-11-19 07:59:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:56,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:56,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:56,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:57,117 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:57,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:59,158 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:59,179 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:59,179 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:59:59,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:59 BoogieIcfgContainer [2023-11-19 07:59:59,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:59,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:59,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:59,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:59,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:55" (1/3) ... [2023-11-19 07:59:59,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2323e5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:59, skipping insertion in model container [2023-11-19 07:59:59,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:56" (2/3) ... [2023-11-19 07:59:59,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2323e5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:59, skipping insertion in model container [2023-11-19 07:59:59,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:59" (3/3) ... [2023-11-19 07:59:59,204 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2023-11-19 07:59:59,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:59,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:59:59,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:59,304 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@589c0bc6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:59,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:59:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-19 07:59:59,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:59,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:59,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:59,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -233001789, now seen corresponding path program 1 times [2023-11-19 07:59:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254262605] [2023-11-19 07:59:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254262605] [2023-11-19 08:00:00,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254262605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:00,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:00,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:00,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59532698] [2023-11-19 08:00:00,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:00,491 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:02,016 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2023-11-19 08:00:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:02,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2023-11-19 08:00:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:02,056 INFO L225 Difference]: With dead ends: 864 [2023-11-19 08:00:02,057 INFO L226 Difference]: Without dead ends: 468 [2023-11-19 08:00:02,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:02,074 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 123 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:02,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 08:00:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-19 08:00:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2023-11-19 08:00:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2023-11-19 08:00:02,196 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 155 [2023-11-19 08:00:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:02,201 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2023-11-19 08:00:02,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2023-11-19 08:00:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-19 08:00:02,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:02,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:02,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:02,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:02,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:02,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1225907725, now seen corresponding path program 1 times [2023-11-19 08:00:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:02,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292172932] [2023-11-19 08:00:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292172932] [2023-11-19 08:00:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292172932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:02,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:02,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487409023] [2023-11-19 08:00:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:02,903 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:04,189 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2023-11-19 08:00:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2023-11-19 08:00:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:04,197 INFO L225 Difference]: With dead ends: 1330 [2023-11-19 08:00:04,198 INFO L226 Difference]: Without dead ends: 878 [2023-11-19 08:00:04,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:04,201 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:04,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 163 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 08:00:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-19 08:00:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2023-11-19 08:00:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2023-11-19 08:00:04,248 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 160 [2023-11-19 08:00:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:04,248 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2023-11-19 08:00:04,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2023-11-19 08:00:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-19 08:00:04,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:04,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:04,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:04,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:04,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash 948456388, now seen corresponding path program 1 times [2023-11-19 08:00:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018952949] [2023-11-19 08:00:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:04,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018952949] [2023-11-19 08:00:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018952949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:04,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:04,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420762332] [2023-11-19 08:00:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:04,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:04,552 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:05,751 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2023-11-19 08:00:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-19 08:00:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:05,773 INFO L225 Difference]: With dead ends: 2575 [2023-11-19 08:00:05,773 INFO L226 Difference]: Without dead ends: 1703 [2023-11-19 08:00:05,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:05,777 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:05,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:00:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-19 08:00:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2023-11-19 08:00:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.498220640569395) internal successors, (2526), 1686 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2526 transitions. [2023-11-19 08:00:05,895 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2526 transitions. Word has length 163 [2023-11-19 08:00:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:05,897 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2526 transitions. [2023-11-19 08:00:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2526 transitions. [2023-11-19 08:00:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-19 08:00:05,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:05,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:05,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:05,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:05,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 974158482, now seen corresponding path program 1 times [2023-11-19 08:00:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221612346] [2023-11-19 08:00:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:00:06,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:06,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221612346] [2023-11-19 08:00:06,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221612346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:06,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:06,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904088140] [2023-11-19 08:00:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:06,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:06,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:06,325 INFO L87 Difference]: Start difference. First operand 1687 states and 2526 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:07,553 INFO L93 Difference]: Finished difference Result 4194 states and 6260 transitions. [2023-11-19 08:00:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2023-11-19 08:00:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:07,574 INFO L225 Difference]: With dead ends: 4194 [2023-11-19 08:00:07,574 INFO L226 Difference]: Without dead ends: 2509 [2023-11-19 08:00:07,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:07,583 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:07,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 115 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:00:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2023-11-19 08:00:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2023-11-19 08:00:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4654966094934185) internal successors, (3674), 2507 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3674 transitions. [2023-11-19 08:00:07,673 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3674 transitions. Word has length 172 [2023-11-19 08:00:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:07,674 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3674 transitions. [2023-11-19 08:00:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3674 transitions. [2023-11-19 08:00:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-19 08:00:07,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:07,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:07,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:07,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:07,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1777547190, now seen corresponding path program 1 times [2023-11-19 08:00:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874240818] [2023-11-19 08:00:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:08,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874240818] [2023-11-19 08:00:08,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874240818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276274343] [2023-11-19 08:00:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:08,335 INFO L87 Difference]: Start difference. First operand 2508 states and 3674 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:09,519 INFO L93 Difference]: Finished difference Result 6243 states and 9108 transitions. [2023-11-19 08:00:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-11-19 08:00:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:09,543 INFO L225 Difference]: With dead ends: 6243 [2023-11-19 08:00:09,543 INFO L226 Difference]: Without dead ends: 3737 [2023-11-19 08:00:09,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:09,548 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:09,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 155 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:00:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2023-11-19 08:00:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3726. [2023-11-19 08:00:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3726 states, 3725 states have (on average 1.4112751677852349) internal successors, (5257), 3725 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 5257 transitions. [2023-11-19 08:00:09,658 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 5257 transitions. Word has length 174 [2023-11-19 08:00:09,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:09,659 INFO L495 AbstractCegarLoop]: Abstraction has 3726 states and 5257 transitions. [2023-11-19 08:00:09,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 5257 transitions. [2023-11-19 08:00:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-19 08:00:09,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:09,667 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:09,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:00:09,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:09,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1531262147, now seen corresponding path program 1 times [2023-11-19 08:00:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:09,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063366277] [2023-11-19 08:00:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:09,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:00:09,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:09,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063366277] [2023-11-19 08:00:09,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063366277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:09,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:09,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:09,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950253469] [2023-11-19 08:00:09,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:09,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:09,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:09,967 INFO L87 Difference]: Start difference. First operand 3726 states and 5257 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:11,115 INFO L93 Difference]: Finished difference Result 10904 states and 15407 transitions. [2023-11-19 08:00:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:11,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 175 [2023-11-19 08:00:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:11,159 INFO L225 Difference]: With dead ends: 10904 [2023-11-19 08:00:11,159 INFO L226 Difference]: Without dead ends: 7180 [2023-11-19 08:00:11,166 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 [2023-11-19 08:00:11,168 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 225 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:11,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 429 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 08:00:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7180 states. [2023-11-19 08:00:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7180 to 6163. [2023-11-19 08:00:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 1.294871794871795) internal successors, (7979), 6162 states have internal predecessors, (7979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 7979 transitions. [2023-11-19 08:00:11,369 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 7979 transitions. Word has length 175 [2023-11-19 08:00:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:11,370 INFO L495 AbstractCegarLoop]: Abstraction has 6163 states and 7979 transitions. [2023-11-19 08:00:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 7979 transitions. [2023-11-19 08:00:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-19 08:00:11,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:11,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:00:11,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:11,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1605526751, now seen corresponding path program 1 times [2023-11-19 08:00:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53055576] [2023-11-19 08:00:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53055576] [2023-11-19 08:00:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53055576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:11,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547167035] [2023-11-19 08:00:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:11,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:11,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:11,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:12,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:12,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 08:00:12,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:12,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547167035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:12,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:12,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-19 08:00:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175521879] [2023-11-19 08:00:12,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:12,601 INFO L87 Difference]: Start difference. First operand 6163 states and 7979 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:13,807 INFO L93 Difference]: Finished difference Result 17012 states and 22108 transitions. [2023-11-19 08:00:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2023-11-19 08:00:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:13,897 INFO L225 Difference]: With dead ends: 17012 [2023-11-19 08:00:13,897 INFO L226 Difference]: Without dead ends: 10851 [2023-11-19 08:00:13,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:13,907 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 106 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:13,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 167 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:00:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2023-11-19 08:00:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10647. [2023-11-19 08:00:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10647 states, 10646 states have (on average 1.2629156490700733) internal successors, (13445), 10646 states have internal predecessors, (13445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10647 states to 10647 states and 13445 transitions. [2023-11-19 08:00:14,208 INFO L78 Accepts]: Start accepts. Automaton has 10647 states and 13445 transitions. Word has length 181 [2023-11-19 08:00:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:14,209 INFO L495 AbstractCegarLoop]: Abstraction has 10647 states and 13445 transitions. [2023-11-19 08:00:14,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10647 states and 13445 transitions. [2023-11-19 08:00:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-19 08:00:14,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:14,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:14,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:00:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:00:14,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:14,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1425017727, now seen corresponding path program 1 times [2023-11-19 08:00:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:14,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345612659] [2023-11-19 08:00:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345612659] [2023-11-19 08:00:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345612659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001048690] [2023-11-19 08:00:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:14,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:15,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:15,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:15,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:00:15,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:15,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001048690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:15,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:15,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 08:00:15,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444042892] [2023-11-19 08:00:15,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:15,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:15,531 INFO L87 Difference]: Start difference. First operand 10647 states and 13445 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:16,761 INFO L93 Difference]: Finished difference Result 29228 states and 37033 transitions. [2023-11-19 08:00:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 193 [2023-11-19 08:00:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:16,796 INFO L225 Difference]: With dead ends: 29228 [2023-11-19 08:00:16,797 INFO L226 Difference]: Without dead ends: 18583 [2023-11-19 08:00:16,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:16,816 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 97 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:16,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 399 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:00:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18583 states. [2023-11-19 08:00:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18583 to 18574. [2023-11-19 08:00:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 18573 states have (on average 1.234803208959242) internal successors, (22934), 18573 states have internal predecessors, (22934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 22934 transitions. [2023-11-19 08:00:17,194 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 22934 transitions. Word has length 193 [2023-11-19 08:00:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:17,194 INFO L495 AbstractCegarLoop]: Abstraction has 18574 states and 22934 transitions. [2023-11-19 08:00:17,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 22934 transitions. [2023-11-19 08:00:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-19 08:00:17,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:17,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:17,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:00:17,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:17,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1807391862, now seen corresponding path program 1 times [2023-11-19 08:00:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:17,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165206963] [2023-11-19 08:00:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 08:00:17,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165206963] [2023-11-19 08:00:17,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165206963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:17,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:17,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865526208] [2023-11-19 08:00:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:17,800 INFO L87 Difference]: Start difference. First operand 18574 states and 22934 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:18,999 INFO L93 Difference]: Finished difference Result 44860 states and 56269 transitions. [2023-11-19 08:00:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 206 [2023-11-19 08:00:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:19,054 INFO L225 Difference]: With dead ends: 44860 [2023-11-19 08:00:19,055 INFO L226 Difference]: Without dead ends: 26491 [2023-11-19 08:00:19,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:19,077 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 176 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:19,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 203 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 08:00:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26491 states. [2023-11-19 08:00:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26491 to 26491. [2023-11-19 08:00:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26491 states, 26490 states have (on average 1.1830502076255192) internal successors, (31339), 26490 states have internal predecessors, (31339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26491 states to 26491 states and 31339 transitions. [2023-11-19 08:00:19,637 INFO L78 Accepts]: Start accepts. Automaton has 26491 states and 31339 transitions. Word has length 206 [2023-11-19 08:00:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:19,638 INFO L495 AbstractCegarLoop]: Abstraction has 26491 states and 31339 transitions. [2023-11-19 08:00:19,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26491 states and 31339 transitions. [2023-11-19 08:00:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-19 08:00:19,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:19,690 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:00:19,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:19,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 844524870, now seen corresponding path program 1 times [2023-11-19 08:00:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708386610] [2023-11-19 08:00:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 08:00:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708386610] [2023-11-19 08:00:20,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708386610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:20,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901598349] [2023-11-19 08:00:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:20,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:20,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:20,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:20,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:20,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 08:00:20,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901598349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:20,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:20,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-19 08:00:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028199339] [2023-11-19 08:00:20,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:20,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:20,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:20,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:20,703 INFO L87 Difference]: Start difference. First operand 26491 states and 31339 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:21,335 INFO L93 Difference]: Finished difference Result 78450 states and 92791 transitions. [2023-11-19 08:00:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 258 [2023-11-19 08:00:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:21,441 INFO L225 Difference]: With dead ends: 78450 [2023-11-19 08:00:21,442 INFO L226 Difference]: Without dead ends: 52164 [2023-11-19 08:00:21,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:21,470 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 320 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:21,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 596 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:00:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52164 states. [2023-11-19 08:00:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52164 to 52162. [2023-11-19 08:00:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52162 states, 52161 states have (on average 1.1806713828339181) internal successors, (61585), 52161 states have internal predecessors, (61585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52162 states to 52162 states and 61585 transitions. [2023-11-19 08:00:22,712 INFO L78 Accepts]: Start accepts. Automaton has 52162 states and 61585 transitions. Word has length 258 [2023-11-19 08:00:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:22,713 INFO L495 AbstractCegarLoop]: Abstraction has 52162 states and 61585 transitions. [2023-11-19 08:00:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 52162 states and 61585 transitions. [2023-11-19 08:00:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-19 08:00:23,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:23,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:23,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:23,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:00:23,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:23,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1012073035, now seen corresponding path program 1 times [2023-11-19 08:00:23,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:23,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154037250] [2023-11-19 08:00:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:23,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-19 08:00:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154037250] [2023-11-19 08:00:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154037250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803975963] [2023-11-19 08:00:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:24,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:24,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:24,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:24,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-19 08:00:24,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803975963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:24,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:24,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 08:00:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953647515] [2023-11-19 08:00:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:00:24,421 INFO L87 Difference]: Start difference. First operand 52162 states and 61585 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:26,405 INFO L93 Difference]: Finished difference Result 150597 states and 178484 transitions. [2023-11-19 08:00:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 266 [2023-11-19 08:00:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:26,665 INFO L225 Difference]: With dead ends: 150597 [2023-11-19 08:00:26,665 INFO L226 Difference]: Without dead ends: 98640 [2023-11-19 08:00:26,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:00:26,737 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 617 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:26,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 540 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 08:00:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98640 states. [2023-11-19 08:00:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98640 to 98588. [2023-11-19 08:00:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98588 states, 98587 states have (on average 1.1811902177771918) internal successors, (116450), 98587 states have internal predecessors, (116450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98588 states to 98588 states and 116450 transitions. [2023-11-19 08:00:28,935 INFO L78 Accepts]: Start accepts. Automaton has 98588 states and 116450 transitions. Word has length 266 [2023-11-19 08:00:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:28,936 INFO L495 AbstractCegarLoop]: Abstraction has 98588 states and 116450 transitions. [2023-11-19 08:00:28,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 98588 states and 116450 transitions. [2023-11-19 08:00:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-19 08:00:29,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:29,017 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:29,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:29,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:29,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1569244843, now seen corresponding path program 1 times [2023-11-19 08:00:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:29,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221948752] [2023-11-19 08:00:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:29,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 132 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-19 08:00:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221948752] [2023-11-19 08:00:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221948752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919339909] [2023-11-19 08:00:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:30,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:30,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:30,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:30,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cf2377-cd3d-42f5-9fcd-1738854a1301/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:30,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:30,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-19 08:00:30,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:30,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919339909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:30,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:30,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-19 08:00:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476091783] [2023-11-19 08:00:30,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:30,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:30,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:30,776 INFO L87 Difference]: Start difference. First operand 98588 states and 116450 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:32,763 INFO L93 Difference]: Finished difference Result 244505 states and 288561 transitions. [2023-11-19 08:00:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2023-11-19 08:00:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:33,086 INFO L225 Difference]: With dead ends: 244505 [2023-11-19 08:00:33,087 INFO L226 Difference]: Without dead ends: 146122 [2023-11-19 08:00:33,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:33,168 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 156 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:33,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 206 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 08:00:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146122 states. [2023-11-19 08:00:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146122 to 135152. [2023-11-19 08:00:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135152 states, 135151 states have (on average 1.1671907718033903) internal successors, (157747), 135151 states have internal predecessors, (157747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)