./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0397e1839c0d761fe403b06501425acc9e7bddc9f103e53ae177509d148aabf4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:37:56,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:37:56,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:37:56,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:37:56,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:37:56,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:37:56,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:37:56,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:37:56,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:37:56,931 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:37:56,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:37:56,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:37:56,934 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:37:56,935 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:37:56,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:37:56,937 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:37:56,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:37:56,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:37:56,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:37:56,939 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:37:56,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:37:56,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:37:56,940 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:37:56,941 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:37:56,941 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:37:56,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:37:56,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:37:56,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:37:56,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:56,944 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:37:56,945 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:37:56,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:37:56,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:37:56,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:37:56,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:37:56,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:37:56,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:37:56,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:37:56,948 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:37:56,948 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_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0397e1839c0d761fe403b06501425acc9e7bddc9f103e53ae177509d148aabf4 [2023-11-06 22:37:57,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:37:57,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:37:57,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:37:57,279 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:37:57,279 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:37:57,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loops-crafted-1/nested3-2.c [2023-11-06 22:38:00,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:38:00,686 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:38:00,687 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/sv-benchmarks/c/loops-crafted-1/nested3-2.c [2023-11-06 22:38:00,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/data/12a80a535/317a04ed789d41daba3ed473203e0f0f/FLAG9614fbafa [2023-11-06 22:38:00,720 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/data/12a80a535/317a04ed789d41daba3ed473203e0f0f [2023-11-06 22:38:00,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:38:00,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:38:00,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:38:00,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:38:00,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:38:00,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:00" (1/1) ... [2023-11-06 22:38:00,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e56712c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:00, skipping insertion in model container [2023-11-06 22:38:00,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:00" (1/1) ... [2023-11-06 22:38:00,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:38:00,950 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_e7a9b294-94fa-4b80-9367-79984d69be61/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2023-11-06 22:38:00,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:38:00,987 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:38:01,000 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_e7a9b294-94fa-4b80-9367-79984d69be61/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2023-11-06 22:38:01,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:38:01,026 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:38:01,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01 WrapperNode [2023-11-06 22:38:01,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:38:01,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:38:01,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:38:01,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:38:01,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,065 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-11-06 22:38:01,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:38:01,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:38:01,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:38:01,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:38:01,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,092 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,092 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:38:01,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:38:01,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:38:01,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:38:01,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (1/1) ... [2023-11-06 22:38:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:38:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:01,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:38:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:38:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:38:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:38:01,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:38:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:38:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:38:01,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:38:01,297 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:38:01,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:38:01,484 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:38:01,490 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:38:01,490 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:38:01,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:01 BoogieIcfgContainer [2023-11-06 22:38:01,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:38:01,496 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:38:01,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:38:01,500 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:38:01,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:38:00" (1/3) ... [2023-11-06 22:38:01,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f342b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:01, skipping insertion in model container [2023-11-06 22:38:01,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:01" (2/3) ... [2023-11-06 22:38:01,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f342b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:01, skipping insertion in model container [2023-11-06 22:38:01,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:01" (3/3) ... [2023-11-06 22:38:01,504 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2023-11-06 22:38:01,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:38:01,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:38:01,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:38:01,585 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@727badf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:38:01,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:38:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:38:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:38:01,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:01,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:01,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:01,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:01,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2023-11-06 22:38:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:01,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821591115] [2023-11-06 22:38:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:01,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821591115] [2023-11-06 22:38:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821591115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:01,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:01,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:01,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284620974] [2023-11-06 22:38:01,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:01,988 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:02,028 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2023-11-06 22:38:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 22:38:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:02,039 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:38:02,040 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 22:38:02,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,048 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:02,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 22:38:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-11-06 22:38:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:38:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-06 22:38:02,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2023-11-06 22:38:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:02,091 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-06 22:38:02,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-06 22:38:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 22:38:02,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:02,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:02,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:38:02,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:02,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2023-11-06 22:38:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478513101] [2023-11-06 22:38:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478513101] [2023-11-06 22:38:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478513101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:02,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:02,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:02,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773316393] [2023-11-06 22:38:02,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:02,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:02,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:02,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,223 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:02,292 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-11-06 22:38:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 22:38:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:02,294 INFO L225 Difference]: With dead ends: 35 [2023-11-06 22:38:02,294 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:38:02,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,297 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:02,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:38:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-06 22:38:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:38:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-06 22:38:02,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2023-11-06 22:38:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:02,318 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-06 22:38:02,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-06 22:38:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:38:02,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:02,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:02,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:38:02,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:02,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2023-11-06 22:38:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:02,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63769844] [2023-11-06 22:38:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:02,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63769844] [2023-11-06 22:38:02,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63769844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:02,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:02,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:38:02,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879031419] [2023-11-06 22:38:02,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:02,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:02,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,447 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:02,460 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-11-06 22:38:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 22:38:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:02,462 INFO L225 Difference]: With dead ends: 35 [2023-11-06 22:38:02,462 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 22:38:02,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:02,464 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:02,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 22:38:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-06 22:38:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:38:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-06 22:38:02,473 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2023-11-06 22:38:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:02,473 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-06 22:38:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-06 22:38:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:38:02,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:02,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:02,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:38:02,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:02,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2023-11-06 22:38:02,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:02,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807603058] [2023-11-06 22:38:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807603058] [2023-11-06 22:38:02,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807603058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333702037] [2023-11-06 22:38:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:02,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:02,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:02,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:02,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:38:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:02,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:38:02,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333702037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:02,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:02,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:38:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968784860] [2023-11-06 22:38:02,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:02,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:38:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:38:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:38:02,784 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:02,829 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-11-06 22:38:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:38:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:38:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:02,835 INFO L225 Difference]: With dead ends: 39 [2023-11-06 22:38:02,835 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 22:38:02,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:38:02,838 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:02,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 22:38:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-06 22:38:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:38:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-06 22:38:02,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-11-06 22:38:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:02,845 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-06 22:38:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-06 22:38:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:38:02,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:02,847 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:02,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:03,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:03,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2023-11-06 22:38:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:03,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333390130] [2023-11-06 22:38:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:03,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333390130] [2023-11-06 22:38:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333390130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724699098] [2023-11-06 22:38:03,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:03,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:03,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:03,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:03,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:38:03,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:38:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:03,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:38:03,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:03,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:03,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724699098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:03,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:03,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:38:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249115837] [2023-11-06 22:38:03,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:03,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:38:03,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:38:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:38:03,440 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:03,692 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-11-06 22:38:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:38:03,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:38:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:03,694 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:38:03,694 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:38:03,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:38:03,696 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:03,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:38:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:38:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-06 22:38:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:38:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-06 22:38:03,706 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2023-11-06 22:38:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:03,706 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-06 22:38:03,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-06 22:38:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:38:03,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:03,708 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:03,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:03,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:03,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:03,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2064634630, now seen corresponding path program 3 times [2023-11-06 22:38:03,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:03,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846390202] [2023-11-06 22:38:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:03,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:04,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:04,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846390202] [2023-11-06 22:38:04,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846390202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936784454] [2023-11-06 22:38:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:38:04,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:04,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:04,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:38:04,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:38:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:04,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:38:04,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:04,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:05,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936784454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:05,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:05,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 28 [2023-11-06 22:38:05,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284591442] [2023-11-06 22:38:05,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:38:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:05,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:38:05,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:38:05,174 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:35,536 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2023-11-06 22:38:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:38:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:38:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:35,538 INFO L225 Difference]: With dead ends: 78 [2023-11-06 22:38:35,539 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:38:35,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=456, Invalid=1026, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:38:35,541 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:35,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 215 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:38:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-11-06 22:38:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:38:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-11-06 22:38:35,554 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 19 [2023-11-06 22:38:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:35,555 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-11-06 22:38:35,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-11-06 22:38:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:38:35,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:35,557 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:35,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:35,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:35,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:35,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -564256954, now seen corresponding path program 4 times [2023-11-06 22:38:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366697308] [2023-11-06 22:38:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:35,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:36,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366697308] [2023-11-06 22:38:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366697308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255493463] [2023-11-06 22:38:36,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:38:36,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:36,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:36,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:36,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:38:36,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:38:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:36,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:38:36,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:36,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255493463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:38,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:38,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-06 22:38:38,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911053817] [2023-11-06 22:38:38,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:38:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:38:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:38:38,126 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:33,708 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2023-11-06 22:41:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:41:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-06 22:41:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:33,711 INFO L225 Difference]: With dead ends: 107 [2023-11-06 22:41:33,711 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 22:41:33,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 176.7s TimeCoverageRelationStatistics Valid=1744, Invalid=3222, Unknown=4, NotChecked=0, Total=4970 [2023-11-06 22:41:33,716 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:33,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 409 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:41:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 22:41:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-06 22:41:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:41:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-11-06 22:41:33,740 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 31 [2023-11-06 22:41:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:33,741 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-11-06 22:41:33,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-11-06 22:41:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 22:41:33,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:33,744 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:33,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:33,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:33,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:33,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2140772294, now seen corresponding path program 5 times [2023-11-06 22:41:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:33,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877958807] [2023-11-06 22:41:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:36,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:36,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877958807] [2023-11-06 22:41:36,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877958807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287088329] [2023-11-06 22:41:36,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:41:36,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:36,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:36,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:36,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a9b294-94fa-4b80-9367-79984d69be61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:41:51,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-06 22:41:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:51,073 WARN L260 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-06 22:41:51,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:51,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:56,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287088329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:56,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-11-06 22:41:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357698011] [2023-11-06 22:41:56,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-06 22:41:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-06 22:41:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 22:41:56,776 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:00,089 WARN L839 $PredicateComparison]: unable to prove that (and (< (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 268435455) (< (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ 22 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 11) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 33) 4294967296) 268435455) (< (mod (+ 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 39) 4294967296) 268435455) (< (mod (+ 9 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 13) 4294967296) 268435455) (< (mod (+ 14 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 10) 4294967296) 268435455) (< (mod (+ 31 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 20) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 34) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 12) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 24) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 26) 4294967296) 268435455) (< (mod (+ 41 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 17) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 15) 4294967296) 268435455) (< (mod (+ 23 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 43) 4294967296) 268435455) (< (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 45) 4294967296) 268435455) (< (mod (+ 42 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 18) 4294967296) 268435455) (< (mod (+ 19 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 37) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 38) 4294967296) 268435455) (< (mod (+ 32 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ 16 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 36) 4294967296) 268435455) (< (mod (+ 21 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ 44 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 28) 4294967296) 268435455) (< (mod (+ 35 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 27) 4294967296) 268435455) (< (mod (+ 40 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 25) 4294967296) 268435455) (< (mod (+ 30 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ 29 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 268435455) (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 46) 4294967296) 268435455)) is different from false