./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/prodbin-ll.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_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/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_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/prodbin-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/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_d2246261-b54a-4877-a09f-97cb1b71462f/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 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:01:51,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:01:51,771 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:01:51,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:01:51,778 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:01:51,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:01:51,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:01:51,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:01:51,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:01:51,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:01:51,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:01:51,813 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:01:51,814 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:01:51,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:01:51,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:01:51,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:01:51,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:01:51,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:01:51,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:01:51,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:01:51,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:01:51,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:01:51,820 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:01:51,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:01:51,821 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:01:51,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:01:51,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:01:51,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:01:51,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:51,823 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:01:51,824 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:01:51,824 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:01:51,824 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:01:51,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:01:51,825 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:01:51,825 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:01:51,826 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:01:51,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:01:51,826 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:01:51,826 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_d2246261-b54a-4877-a09f-97cb1b71462f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 [2023-11-06 22:01:52,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:01:52,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:01:52,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:01:52,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:01:52,224 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:01:52,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2023-11-06 22:01:55,631 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:01:55,864 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:01:55,865 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2023-11-06 22:01:55,874 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/data/1a34b7c43/237feb64867444ec85d69fd29a3b2943/FLAG8dc69c1a4 [2023-11-06 22:01:55,892 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/data/1a34b7c43/237feb64867444ec85d69fd29a3b2943 [2023-11-06 22:01:55,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:01:55,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:01:55,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:55,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:01:55,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:01:55,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:55" (1/1) ... [2023-11-06 22:01:55,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7e9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:55, skipping insertion in model container [2023-11-06 22:01:55,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:55" (1/1) ... [2023-11-06 22:01:55,937 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:01:56,097 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_d2246261-b54a-4877-a09f-97cb1b71462f/sv-benchmarks/c/nla-digbench/prodbin-ll.c[537,550] [2023-11-06 22:01:56,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:56,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:01:56,134 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_d2246261-b54a-4877-a09f-97cb1b71462f/sv-benchmarks/c/nla-digbench/prodbin-ll.c[537,550] [2023-11-06 22:01:56,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:56,155 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:01:56,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56 WrapperNode [2023-11-06 22:01:56,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:56,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:56,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:01:56,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:01:56,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,191 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-11-06 22:01:56,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:56,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:01:56,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:01:56,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:01:56,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,246 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,253 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,254 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:01:56,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:01:56,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:01:56,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:01:56,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (1/1) ... [2023-11-06 22:01:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:56,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:01:56,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:01:56,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:01:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:01:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:01:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:01:56,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:01:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:01:56,464 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:01:56,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:01:56,619 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:01:56,626 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:01:56,627 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:01:56,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:56 BoogieIcfgContainer [2023-11-06 22:01:56,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:01:56,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:01:56,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:01:56,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:01:56,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:55" (1/3) ... [2023-11-06 22:01:56,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611399d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:56, skipping insertion in model container [2023-11-06 22:01:56,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:56" (2/3) ... [2023-11-06 22:01:56,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611399d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:56, skipping insertion in model container [2023-11-06 22:01:56,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:56" (3/3) ... [2023-11-06 22:01:56,639 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2023-11-06 22:01:56,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:01:56,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:01:56,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:01:56,724 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;@34f3d6bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:01:56,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:01:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:01:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:01:56,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:56,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:56,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:56,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash -589251586, now seen corresponding path program 1 times [2023-11-06 22:01:56,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540067547] [2023-11-06 22:01:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:56,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540067547] [2023-11-06 22:01:56,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:01:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679559082] [2023-11-06 22:01:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:56,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:56,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:56,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:56,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:01:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:56,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:01:56,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:56,998 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 22:01:56,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679559082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:57,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:01:57,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508637045] [2023-11-06 22:01:57,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:01:57,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:01:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:01:57,040 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 22:01:57,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:57,058 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2023-11-06 22:01:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:01:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 22:01:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:57,067 INFO L225 Difference]: With dead ends: 37 [2023-11-06 22:01:57,067 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 22:01:57,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 22:01:57,075 INFO L413 NwaCegarLoop]: 22 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, 22 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 22:01:57,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 22:01:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-06 22:01:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:01:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-06 22:01:57,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2023-11-06 22:01:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:57,116 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-06 22:01:57,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 22:01:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-06 22:01:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:01:57,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:57,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:57,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:57,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:57,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:57,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1187543236, now seen corresponding path program 1 times [2023-11-06 22:01:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:57,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808344441] [2023-11-06 22:01:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:57,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92239636] [2023-11-06 22:01:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:57,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:57,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:57,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:01:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:57,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:01:57,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:57,663 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 22:01:57,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:57,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808344441] [2023-11-06 22:01:57,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92239636] [2023-11-06 22:01:57,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92239636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:57,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:01:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115766306] [2023-11-06 22:01:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:57,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:01:57,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:57,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:01:57,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:01:57,670 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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 22:01:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:57,781 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-11-06 22:01:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:01:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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 22:01:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:57,784 INFO L225 Difference]: With dead ends: 32 [2023-11-06 22:01:57,784 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 22:01:57,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:01:57,787 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:57,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:01:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 22:01:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-06 22:01:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:01:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-06 22:01:57,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 9 [2023-11-06 22:01:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:57,802 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-06 22:01:57,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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 22:01:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-06 22:01:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:01:57,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:57,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:57,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:58,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:58,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:58,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1566145315, now seen corresponding path program 1 times [2023-11-06 22:01:58,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:58,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452572562] [2023-11-06 22:01:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:58,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:58,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:58,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411224837] [2023-11-06 22:01:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:58,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:58,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:58,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:01:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:58,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:01:58,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:58,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:04,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:04,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452572562] [2023-11-06 22:02:04,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411224837] [2023-11-06 22:02:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411224837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:04,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:04,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2023-11-06 22:02:04,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826241315] [2023-11-06 22:02:04,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:02:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:02:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:02:05,004 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:02:06,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:09,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:13,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:13,670 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-06 22:02:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:02:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:02:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:13,674 INFO L225 Difference]: With dead ends: 42 [2023-11-06 22:02:13,674 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:02:13,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:02:13,677 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:13,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 122 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-11-06 22:02:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:02:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-11-06 22:02:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:02:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-11-06 22:02:13,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2023-11-06 22:02:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:13,695 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-11-06 22:02:13,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:02:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-11-06 22:02:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:02:13,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:13,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:13,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:13,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:13,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:13,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:13,906 INFO L85 PathProgramCache]: Analyzing trace with hash 208862047, now seen corresponding path program 1 times [2023-11-06 22:02:13,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:13,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503529296] [2023-11-06 22:02:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:13,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:13,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35807976] [2023-11-06 22:02:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:13,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:13,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:13,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:02:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:13,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:02:13,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:14,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503529296] [2023-11-06 22:02:14,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35807976] [2023-11-06 22:02:14,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35807976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:14,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:14,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:02:14,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140053318] [2023-11-06 22:02:14,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:14,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:02:14,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:02:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:02:14,998 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:02:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:16,053 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-11-06 22:02:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:02:16,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:02:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:16,057 INFO L225 Difference]: With dead ends: 66 [2023-11-06 22:02:16,058 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 22:02:16,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:02:16,060 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:16,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:02:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 22:02:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2023-11-06 22:02:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:02:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-11-06 22:02:16,088 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2023-11-06 22:02:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:16,089 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-11-06 22:02:16,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:02:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-11-06 22:02:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:02:16,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:16,092 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:16,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:02:16,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:16,299 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:16,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1499753556, now seen corresponding path program 1 times [2023-11-06 22:02:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:16,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822540978] [2023-11-06 22:02:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:16,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:16,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087502431] [2023-11-06 22:02:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:16,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:16,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:16,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:02:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:16,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:02:16,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:02:16,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:02:16,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:16,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822540978] [2023-11-06 22:02:16,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:16,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087502431] [2023-11-06 22:02:16,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087502431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:16,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:16,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-11-06 22:02:16,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814358197] [2023-11-06 22:02:16,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:16,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:02:16,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:02:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:02:16,585 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:02:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:16,744 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2023-11-06 22:02:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:02:16,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-11-06 22:02:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:16,748 INFO L225 Difference]: With dead ends: 54 [2023-11-06 22:02:16,748 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 22:02:16,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:02:16,749 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:16,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 61 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:02:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 22:02:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-06 22:02:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:02:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-11-06 22:02:16,775 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 24 [2023-11-06 22:02:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:16,776 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-11-06 22:02:16,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:02:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-11-06 22:02:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:02:16,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:16,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:16,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:16,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:16,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:16,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1993243494, now seen corresponding path program 1 times [2023-11-06 22:02:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334988897] [2023-11-06 22:02:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:16,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:16,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124518335] [2023-11-06 22:02:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:16,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:16,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:17,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:17,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:02:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:17,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:02:17,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:02:17,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:02:36,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:36,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334988897] [2023-11-06 22:02:36,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:36,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124518335] [2023-11-06 22:02:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124518335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:36,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:36,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2023-11-06 22:02:36,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706265872] [2023-11-06 22:02:36,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:36,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:02:36,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:02:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2023-11-06 22:02:36,651 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:02:37,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:39,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:41,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:43,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:46,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:02:53,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:03:03,176 WARN L293 SmtUtils]: Spent 8.86s on a formula simplification. DAG size of input: 64 DAG size of output: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:03:15,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:03:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:20,118 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2023-11-06 22:03:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:03:20,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-11-06 22:03:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:20,122 INFO L225 Difference]: With dead ends: 80 [2023-11-06 22:03:20,123 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 22:03:20,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=137, Invalid=561, Unknown=4, NotChecked=0, Total=702 [2023-11-06 22:03:20,125 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:20,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 105 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 237 Invalid, 4 Unknown, 0 Unchecked, 14.6s Time] [2023-11-06 22:03:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 22:03:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2023-11-06 22:03:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 48 states have internal predecessors, (51), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:03:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-06 22:03:20,142 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2023-11-06 22:03:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:20,143 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-06 22:03:20,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:03:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-06 22:03:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 22:03:20,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:20,145 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:20,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:03:20,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:20,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:20,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash 648870724, now seen corresponding path program 2 times [2023-11-06 22:03:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:20,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591150668] [2023-11-06 22:03:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:20,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:20,360 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18306373] [2023-11-06 22:03:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:03:20,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:20,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:03:20,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:03:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:20,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 22:03:20,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:03:22,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:25,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:25,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591150668] [2023-11-06 22:03:25,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:25,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18306373] [2023-11-06 22:03:25,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18306373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:25,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:25,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-06 22:03:25,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395918006] [2023-11-06 22:03:25,989 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:25,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:03:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:03:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:03:25,992 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:03:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:27,474 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2023-11-06 22:03:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:03:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2023-11-06 22:03:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:27,477 INFO L225 Difference]: With dead ends: 106 [2023-11-06 22:03:27,477 INFO L226 Difference]: Without dead ends: 104 [2023-11-06 22:03:27,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:03:27,479 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:27,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 164 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:03:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-06 22:03:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2023-11-06 22:03:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 76 states have internal predecessors, (82), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:03:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2023-11-06 22:03:27,518 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 45 [2023-11-06 22:03:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:27,518 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2023-11-06 22:03:27,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:03:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2023-11-06 22:03:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:03:27,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:27,521 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:27,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:27,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:27,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:27,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 886615773, now seen corresponding path program 3 times [2023-11-06 22:03:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:27,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271411201] [2023-11-06 22:03:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:27,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:27,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:27,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738035631] [2023-11-06 22:03:27,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:03:27,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:27,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:27,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:03:27,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:03:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:27,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:03:27,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 66 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-06 22:03:28,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271411201] [2023-11-06 22:03:28,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738035631] [2023-11-06 22:03:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738035631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:28,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:28,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-06 22:03:28,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127862330] [2023-11-06 22:03:28,832 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:28,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:03:28,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:03:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:03:28,834 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:03:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:29,582 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2023-11-06 22:03:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:03:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-11-06 22:03:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:29,583 INFO L225 Difference]: With dead ends: 95 [2023-11-06 22:03:29,583 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 22:03:29,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:03:29,585 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:29,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 53 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:03:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 22:03:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 22:03:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 22:03:29,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2023-11-06 22:03:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:29,587 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 22:03:29,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:03:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 22:03:29,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 22:03:29,590 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 22:03:29,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:29,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:29,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-06 22:03:32,877 INFO L895 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|))) (or (and .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (exists ((v_z_47 Int) (v_y_47 Int)) (let ((.cse4 (* v_y_47 2))) (let ((.cse3 (+ v_z_47 .cse4))) (and (not (= v_z_47 1)) (<= v_z_47 1) (= .cse1 (let ((.cse2 (div |ULTIMATE.start_main_~x~0#1| 2))) (+ (* v_z_47 .cse2) |ULTIMATE.start_main_~z~0#1| (* 2 (* .cse2 |ULTIMATE.start_main_~y~0#1|)) (* 2 (* v_y_47 .cse2))))) (<= 0 .cse3) (<= 0 v_z_47) (<= .cse3 1) (<= 0 (+ (* 2 |ULTIMATE.start_main_~y~0#1|) v_z_47 .cse4))))))) (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= .cse1 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0 (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) [2023-11-06 22:03:32,877 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-06 22:03:32,877 INFO L899 garLoopResultBuilder]: For program point L33-1(lines 32 43) no Hoare annotation was computed. [2023-11-06 22:03:32,877 INFO L899 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2023-11-06 22:03:32,878 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-06 22:03:32,878 INFO L899 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2023-11-06 22:03:32,878 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 20 47) the Hoare annotation is: true [2023-11-06 22:03:32,878 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-06 22:03:32,879 INFO L895 garLoopResultBuilder]: At program point L32-2(lines 32 43) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|))) (or (and .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (exists ((v_z_47 Int) (v_y_47 Int)) (let ((.cse4 (* v_y_47 2))) (let ((.cse3 (+ v_z_47 .cse4))) (and (not (= v_z_47 1)) (<= v_z_47 1) (= .cse1 (let ((.cse2 (div |ULTIMATE.start_main_~x~0#1| 2))) (+ (* v_z_47 .cse2) |ULTIMATE.start_main_~z~0#1| (* 2 (* .cse2 |ULTIMATE.start_main_~y~0#1|)) (* 2 (* v_y_47 .cse2))))) (<= 0 .cse3) (<= 0 v_z_47) (<= .cse3 1) (<= 0 (+ (* 2 |ULTIMATE.start_main_~y~0#1|) v_z_47 .cse4))))))) (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= .cse1 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0 (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) [2023-11-06 22:03:32,879 INFO L895 garLoopResultBuilder]: At program point L32-3(lines 32 43) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0))) [2023-11-06 22:03:32,879 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-06 22:03:32,879 INFO L899 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2023-11-06 22:03:32,879 INFO L899 garLoopResultBuilder]: For program point L37(lines 37 40) no Hoare annotation was computed. [2023-11-06 22:03:32,880 INFO L899 garLoopResultBuilder]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2023-11-06 22:03:32,880 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2023-11-06 22:03:32,880 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2023-11-06 22:03:32,880 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2023-11-06 22:03:32,880 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2023-11-06 22:03:32,880 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 18) the Hoare annotation is: true [2023-11-06 22:03:32,881 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-11-06 22:03:32,884 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-11-06 22:03:32,887 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:03:32,906 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: QuantifierExpression (exists v_z_47 : int, v_y_47 : int :: (((((!(v_z_47 == 1) && v_z_47 <= 1) && ~a~0 * ~b~0 == v_z_47 * (~x~0 / 2) + ~z~0 + 2 * (~x~0 / 2 * ~y~0) + 2 * (v_y_47 * (~x~0 / 2))) && 0 <= v_z_47 + v_y_47 * 2) && 0 <= v_z_47) && v_z_47 + v_y_47 * 2 <= 1) && 0 <= 2 * ~y~0 + v_z_47 + v_y_47 * 2) could not be translated [2023-11-06 22:03:32,909 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: QuantifierExpression (exists v_z_47 : int, v_y_47 : int :: (((((!(v_z_47 == 1) && v_z_47 <= 1) && ~a~0 * ~b~0 == v_z_47 * (~x~0 / 2) + ~z~0 + 2 * (~x~0 / 2 * ~y~0) + 2 * (v_y_47 * (~x~0 / 2))) && 0 <= v_z_47 + v_y_47 * 2) && 0 <= v_z_47) && v_z_47 + v_y_47 * 2 <= 1) && 0 <= 2 * ~y~0 + v_z_47 + v_y_47 * 2) could not be translated [2023-11-06 22:03:32,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:03:32 BoogieIcfgContainer [2023-11-06 22:03:32,911 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:03:32,912 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:03:32,912 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:03:32,912 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:03:32,913 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:56" (3/4) ... [2023-11-06 22:03:32,915 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:03:32,920 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-06 22:03:32,926 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-06 22:03:32,926 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 22:03:32,926 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:03:32,927 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 22:03:32,993 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:03:32,994 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:03:32,994 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:03:32,995 INFO L158 Benchmark]: Toolchain (without parser) took 97098.00ms. Allocated memory is still 169.9MB. Free memory was 107.9MB in the beginning and 72.8MB in the end (delta: 35.2MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2023-11-06 22:03:32,995 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 99.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:03:32,996 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.84ms. Allocated memory is still 169.9MB. Free memory was 107.7MB in the beginning and 97.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:03:32,996 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.40ms. Allocated memory is still 169.9MB. Free memory was 97.3MB in the beginning and 95.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:03:33,000 INFO L158 Benchmark]: Boogie Preprocessor took 64.31ms. Allocated memory is still 169.9MB. Free memory was 95.8MB in the beginning and 141.3MB in the end (delta: -45.5MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2023-11-06 22:03:33,002 INFO L158 Benchmark]: RCFGBuilder took 371.12ms. Allocated memory is still 169.9MB. Free memory was 140.7MB in the beginning and 131.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:03:33,003 INFO L158 Benchmark]: TraceAbstraction took 96279.41ms. Allocated memory is still 169.9MB. Free memory was 129.9MB in the beginning and 75.9MB in the end (delta: 54.0MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. [2023-11-06 22:03:33,003 INFO L158 Benchmark]: Witness Printer took 82.27ms. Allocated memory is still 169.9MB. Free memory was 75.9MB in the beginning and 72.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:03:33,006 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 99.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.84ms. Allocated memory is still 169.9MB. Free memory was 107.7MB in the beginning and 97.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.40ms. Allocated memory is still 169.9MB. Free memory was 97.3MB in the beginning and 95.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 64.31ms. Allocated memory is still 169.9MB. Free memory was 95.8MB in the beginning and 141.3MB in the end (delta: -45.5MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * RCFGBuilder took 371.12ms. Allocated memory is still 169.9MB. Free memory was 140.7MB in the beginning and 131.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 96279.41ms. Allocated memory is still 169.9MB. Free memory was 129.9MB in the beginning and 75.9MB in the end (delta: 54.0MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. * Witness Printer took 82.27ms. Allocated memory is still 169.9MB. Free memory was 75.9MB in the beginning and 72.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: QuantifierExpression (exists v_z_47 : int, v_y_47 : int :: (((((!(v_z_47 == 1) && v_z_47 <= 1) && ~a~0 * ~b~0 == v_z_47 * (~x~0 / 2) + ~z~0 + 2 * (~x~0 / 2 * ~y~0) + 2 * (v_y_47 * (~x~0 / 2))) && 0 <= v_z_47 + v_y_47 * 2) && 0 <= v_z_47) && v_z_47 + v_y_47 * 2 <= 1) && 0 <= 2 * ~y~0 + v_z_47 + v_y_47 * 2) could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: QuantifierExpression (exists v_z_47 : int, v_y_47 : int :: (((((!(v_z_47 == 1) && v_z_47 <= 1) && ~a~0 * ~b~0 == v_z_47 * (~x~0 / 2) + ~z~0 + 2 * (~x~0 / 2 * ~y~0) + 2 * (v_y_47 * (~x~0 / 2))) && 0 <= v_z_47 + v_y_47 * 2) && 0 <= v_z_47) && v_z_47 + v_y_47 * 2 <= 1) && 0 <= 2 * ~y~0 + v_z_47 + v_y_47 * 2) could not be translated * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 96.2s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 55.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 149 SdHoareTripleChecker+Valid, 23.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 630 SdHoareTripleChecker+Invalid, 22.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 528 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1161 IncrementalHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 102 mSDtfsCounter, 1161 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 342 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 57.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=7, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 52 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 22 PreInvPairs, 50 NumberOfFragments, 202 HoareAnnotationTreeSize, 22 FomulaSimplifications, 911 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 2921 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 34.5s InterpolantComputationTime, 213 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 279 ConstructedInterpolants, 5 QuantifiedInterpolants, 2695 SizeOfPredicates, 24 NumberOfNonLiveVariables, 601 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 174/252 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant [2023-11-06 22:03:33,026 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: QuantifierExpression (exists v_z_47 : int, v_y_47 : int :: (((((!(v_z_47 == 1) && v_z_47 <= 1) && ~a~0 * ~b~0 == v_z_47 * (~x~0 / 2) + ~z~0 + 2 * (~x~0 / 2 * ~y~0) + 2 * (v_y_47 * (~x~0 / 2))) && 0 <= v_z_47 + v_y_47 * 2) && 0 <= v_z_47) && v_z_47 + v_y_47 * 2 <= 1) && 0 <= 2 * ~y~0 + v_z_47 + v_y_47 * 2) could not be translated [2023-11-06 22:03:33,031 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: QuantifierExpression (exists v_z_47 : int, v_y_47 : int :: (((((!(v_z_47 == 1) && v_z_47 <= 1) && ~a~0 * ~b~0 == v_z_47 * (~x~0 / 2) + ~z~0 + 2 * (~x~0 / 2 * ~y~0) + 2 * (v_y_47 * (~x~0 / 2))) && 0 <= v_z_47 + v_y_47 * 2) && 0 <= v_z_47) && v_z_47 + v_y_47 * 2 <= 1) && 0 <= 2 * ~y~0 + v_z_47 + v_y_47 * 2) could not be translated Derived loop invariant: (((1 <= b) && ((x % 2) == 0)) || (((((0 <= y) && ((a * b) == (x * y))) && (1 <= b)) && (z == 0)) && (a == x))) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-11-06 22:03:33,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2246261-b54a-4877-a09f-97cb1b71462f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE