./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/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_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/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_43df43a6-8626-4830-91c4-5b4178759f98/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 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:06,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:07,051 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:07,057 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:07,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:07,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:07,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:07,087 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:07,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:07,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:07,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:07,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:07,090 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:07,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:07,092 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:07,092 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:07,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:07,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:07,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:07,094 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:07,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:07,095 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:07,096 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:07,096 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:07,096 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:07,097 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:07,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:07,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:07,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:07,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:07,099 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:07,099 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:07,100 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:07,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:07,100 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:07,100 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:07,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:07,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:07,101 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:07,101 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_43df43a6-8626-4830-91c4-5b4178759f98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e [2023-11-06 23:03:07,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:07,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:07,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:07,366 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:07,366 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:07,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/reducercommutativity/max.i [2023-11-06 23:03:10,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:10,725 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:10,726 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/sv-benchmarks/c/reducercommutativity/max.i [2023-11-06 23:03:10,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/data/26f420547/b37d8f3444ce4ad9ac553020d8716c3f/FLAGd512ee417 [2023-11-06 23:03:10,753 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/data/26f420547/b37d8f3444ce4ad9ac553020d8716c3f [2023-11-06 23:03:10,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:10,757 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:10,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:10,759 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:10,770 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:10,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:10" (1/1) ... [2023-11-06 23:03:10,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c51728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:10, skipping insertion in model container [2023-11-06 23:03:10,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:10" (1/1) ... [2023-11-06 23:03:10,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:10,969 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_43df43a6-8626-4830-91c4-5b4178759f98/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2023-11-06 23:03:10,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:10,984 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:11,006 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_43df43a6-8626-4830-91c4-5b4178759f98/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2023-11-06 23:03:11,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:11,023 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:11,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11 WrapperNode [2023-11-06 23:03:11,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:11,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:11,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:11,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:11,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,064 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-11-06 23:03:11,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:11,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:11,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:11,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:11,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:11,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:11,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:11,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:11,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (1/1) ... [2023-11-06 23:03:11,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:11,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:11,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-06 23:03:11,187 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-06 23:03:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:11,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:11,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:03:11,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:11,260 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:11,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:11,446 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:11,453 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:11,453 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:03:11,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:11 BoogieIcfgContainer [2023-11-06 23:03:11,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:11,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:11,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:11,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:11,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:10" (1/3) ... [2023-11-06 23:03:11,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aea466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:11, skipping insertion in model container [2023-11-06 23:03:11,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:11" (2/3) ... [2023-11-06 23:03:11,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aea466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:11, skipping insertion in model container [2023-11-06 23:03:11,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:11" (3/3) ... [2023-11-06 23:03:11,465 INFO L112 eAbstractionObserver]: Analyzing ICFG max.i [2023-11-06 23:03:11,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:11,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:11,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:11,539 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;@8c1926e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:11,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:03:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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 23:03:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:03:11,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:11,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:11,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:11,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash -344723103, now seen corresponding path program 1 times [2023-11-06 23:03:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:11,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418519721] [2023-11-06 23:03:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 23:03:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 23:03:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:03:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:03:11,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:11,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418519721] [2023-11-06 23:03:11,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418519721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:11,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:11,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675606889] [2023-11-06 23:03:11,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:03:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:03:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:03:11,865 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:11,889 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-11-06 23:03:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:03:11,891 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-06 23:03:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:11,898 INFO L225 Difference]: With dead ends: 52 [2023-11-06 23:03:11,898 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 23:03:11,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:03:11,905 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:11,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 23:03:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 23:03:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) 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, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:03:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-06 23:03:11,940 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-11-06 23:03:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:11,940 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-06 23:03:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-06 23:03:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:03:11,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:11,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:11,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:03:11,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:11,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash 47571572, now seen corresponding path program 1 times [2023-11-06 23:03:11,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011265373] [2023-11-06 23:03:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 23:03:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:12,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 23:03:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:12,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:03:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 23:03:12,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011265373] [2023-11-06 23:03:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011265373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200448639] [2023-11-06 23:03:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:12,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:12,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:12,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:12,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:12,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:03:12,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200448639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:12,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:12,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-06 23:03:12,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495810066] [2023-11-06 23:03:12,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:12,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:12,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:12,548 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:12,598 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-11-06 23:03:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-06 23:03:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:12,600 INFO L225 Difference]: With dead ends: 46 [2023-11-06 23:03:12,600 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 23:03:12,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:12,603 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:12,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 23:03:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-06 23:03:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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 23:03:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-06 23:03:12,612 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-11-06 23:03:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:12,612 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-06 23:03:12,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-06 23:03:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 23:03:12,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:12,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:12,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:12,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:12,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash 892558991, now seen corresponding path program 1 times [2023-11-06 23:03:12,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:12,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961376370] [2023-11-06 23:03:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:12,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 23:03:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 23:03:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-06 23:03:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:03:13,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961376370] [2023-11-06 23:03:13,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961376370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:13,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:13,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43238789] [2023-11-06 23:03:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:13,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:13,082 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:13,121 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-06 23:03:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-06 23:03:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:13,124 INFO L225 Difference]: With dead ends: 41 [2023-11-06 23:03:13,124 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 23:03:13,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:13,126 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:13,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 23:03:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-06 23:03:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 23:03:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-06 23:03:13,134 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 40 [2023-11-06 23:03:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:13,135 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-06 23:03:13,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-06 23:03:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 23:03:13,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:13,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:03:13,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:13,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 759414797, now seen corresponding path program 1 times [2023-11-06 23:03:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479297048] [2023-11-06 23:03:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 23:03:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 23:03:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-06 23:03:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:13,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479297048] [2023-11-06 23:03:13,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479297048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:13,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286212177] [2023-11-06 23:03:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:13,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:13,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:03:13,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 23:03:13,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:13,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286212177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:13,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:13,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-11-06 23:03:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077027495] [2023-11-06 23:03:13,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:03:13,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:03:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:03:13,785 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:03:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:13,924 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2023-11-06 23:03:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:13,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-11-06 23:03:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:13,927 INFO L225 Difference]: With dead ends: 53 [2023-11-06 23:03:13,927 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 23:03:13,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:03:13,932 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:13,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 97 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 23:03:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-06 23:03:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 23:03:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-06 23:03:13,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 42 [2023-11-06 23:03:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:13,940 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-06 23:03:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 23:03:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-06 23:03:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 23:03:13,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:13,947 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:13,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:14,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 23:03:14,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:14,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash -239696728, now seen corresponding path program 2 times [2023-11-06 23:03:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:14,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224758258] [2023-11-06 23:03:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:15,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 23:03:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:15,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-06 23:03:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 23:03:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:16,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224758258] [2023-11-06 23:03:16,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224758258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:16,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181650180] [2023-11-06 23:03:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:16,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:16,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:16,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:16,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:16,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 23:03:16,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:16,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 23:03:17,079 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:17,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-06 23:03:17,189 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:17,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-11-06 23:03:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:17,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:20,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181650180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:20,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:20,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 41 [2023-11-06 23:03:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157316850] [2023-11-06 23:03:20,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:20,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 23:03:20,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 23:03:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2376, Unknown=1, NotChecked=0, Total=2652 [2023-11-06 23:03:20,903 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 41 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:03:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:24,027 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2023-11-06 23:03:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 23:03:24,028 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2023-11-06 23:03:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:24,034 INFO L225 Difference]: With dead ends: 198 [2023-11-06 23:03:24,036 INFO L226 Difference]: Without dead ends: 170 [2023-11-06 23:03:24,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3859 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1348, Invalid=9993, Unknown=1, NotChecked=0, Total=11342 [2023-11-06 23:03:24,044 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 268 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:24,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 290 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:03:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-06 23:03:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 122. [2023-11-06 23:03:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 109 states have internal predecessors, (131), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2023-11-06 23:03:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 157 transitions. [2023-11-06 23:03:24,093 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 157 transitions. Word has length 54 [2023-11-06 23:03:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:24,096 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 157 transitions. [2023-11-06 23:03:24,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:03:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 157 transitions. [2023-11-06 23:03:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 23:03:24,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:24,109 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:24,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:24,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43df43a6-8626-4830-91c4-5b4178759f98/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:24,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:24,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1146506666, now seen corresponding path program 1 times [2023-11-06 23:03:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:24,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686985321] [2023-11-06 23:03:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat