./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:14,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:14,616 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:14,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:14,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:14,653 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:14,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:14,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:14,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:14,656 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:14,657 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:14,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:14,659 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:14,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:14,660 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:14,660 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:14,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:14,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:14,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:14,663 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:14,663 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:14,664 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:14,665 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:14,665 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:14,666 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:14,667 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:14,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:14,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:14,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:14,683 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:14,684 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:14,684 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:14,685 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:14,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:14,686 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:14,686 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:14,687 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:14,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:14,688 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:14,688 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_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 [2023-11-19 08:01:14,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:15,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:15,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:15,034 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:15,037 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:15,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2023-11-19 08:01:18,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:18,537 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:18,538 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2023-11-19 08:01:18,548 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/data/4d6c2aa09/b58f975bea1346549780b1b1144e8d59/FLAG45b8a0103 [2023-11-19 08:01:18,588 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/data/4d6c2aa09/b58f975bea1346549780b1b1144e8d59 [2023-11-19 08:01:18,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:18,601 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:18,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:18,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:18,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:18,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:18,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d9d239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18, skipping insertion in model container [2023-11-19 08:01:18,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:18,646 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:18,858 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_0192421b-cd1e-42ee-8db5-edb14f53321c/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2023-11-19 08:01:18,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:18,895 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:18,914 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_0192421b-cd1e-42ee-8db5-edb14f53321c/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2023-11-19 08:01:18,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:18,943 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:18,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18 WrapperNode [2023-11-19 08:01:18,944 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:18,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:18,946 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:18,946 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:18,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:18,974 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,006 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-11-19 08:01:19,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:19,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:19,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:19,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:19,025 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,062 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:19,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:19,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:19,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:19,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (1/1) ... [2023-11-19 08:01:19,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:19,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:19,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:19,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:19,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:19,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:19,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 08:01:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 08:01:19,278 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:19,281 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:19,580 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:19,597 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:19,597 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:01:19,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:19 BoogieIcfgContainer [2023-11-19 08:01:19,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:19,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:19,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:19,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:19,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:18" (1/3) ... [2023-11-19 08:01:19,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcf15a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:19, skipping insertion in model container [2023-11-19 08:01:19,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:18" (2/3) ... [2023-11-19 08:01:19,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcf15a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:19, skipping insertion in model container [2023-11-19 08:01:19,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:19" (3/3) ... [2023-11-19 08:01:19,622 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2023-11-19 08:01:19,646 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:19,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:19,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:19,741 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59beca27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:19,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:01:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2023-11-19 08:01:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 08:01:19,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:19,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:19,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:19,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2023-11-19 08:01:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:19,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388544446] [2023-11-19 08:01:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:19,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388544446] [2023-11-19 08:01:19,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:01:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102645827] [2023-11-19 08:01:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:19,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:19,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:19,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:19,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:01:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:20,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:01:20,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:20,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102645827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:20,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145010484] [2023-11-19 08:01:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:01:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:01:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:20,135 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:20,171 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2023-11-19 08:01:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 08:01:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:20,221 INFO L225 Difference]: With dead ends: 37 [2023-11-19 08:01:20,221 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 08:01:20,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:20,247 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2023-11-19 08:01:20,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 08:01:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 08:01:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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) [2023-11-19 08:01:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-19 08:01:20,364 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2023-11-19 08:01:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:20,369 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-19 08:01:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-19 08:01:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 08:01:20,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:20,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:20,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:20,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:01:20,575 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:20,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2023-11-19 08:01:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523681420] [2023-11-19 08:01:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:20,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523681420] [2023-11-19 08:01:20,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:01:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226811362] [2023-11-19 08:01:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:20,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:20,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:20,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:20,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:01:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:20,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:01:20,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:20,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226811362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:20,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:20,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:20,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122805955] [2023-11-19 08:01:20,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:20,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:20,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:20,853 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-19 08:01:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:20,877 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2023-11-19 08:01:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 08:01:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:20,879 INFO L225 Difference]: With dead ends: 31 [2023-11-19 08:01:20,879 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 08:01:20,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:20,881 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:20,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 08:01:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 08:01:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-11-19 08:01:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-19 08:01:20,889 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-11-19 08:01:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:20,890 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-19 08:01:20,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-19 08:01:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-19 08:01:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 08:01:20,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:20,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:20,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:21,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:21,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2023-11-19 08:01:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:21,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192783989] [2023-11-19 08:01:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:21,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:21,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685208327] [2023-11-19 08:01:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:21,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:21,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:21,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:01:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:21,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:01:21,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:21,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192783989] [2023-11-19 08:01:21,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:21,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685208327] [2023-11-19 08:01:21,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685208327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:21,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:21,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:01:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788621839] [2023-11-19 08:01:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:21,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:21,281 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-19 08:01:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:21,319 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-19 08:01:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2023-11-19 08:01:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:21,321 INFO L225 Difference]: With dead ends: 30 [2023-11-19 08:01:21,321 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 08:01:21,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:21,324 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:21,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 08:01:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-19 08:01:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2023-11-19 08:01:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-19 08:01:21,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-11-19 08:01:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:21,334 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-19 08:01:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-19 08:01:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-19 08:01:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 08:01:21,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:21,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:21,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:21,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:21,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:21,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2023-11-19 08:01:21,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:21,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280922002] [2023-11-19 08:01:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:21,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:21,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741679389] [2023-11-19 08:01:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:21,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:21,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:21,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:01:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:21,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:01:21,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:21,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:21,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:21,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280922002] [2023-11-19 08:01:21,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:21,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741679389] [2023-11-19 08:01:21,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741679389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:21,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:21,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:01:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110012465] [2023-11-19 08:01:21,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:21,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:21,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:21,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:21,724 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-19 08:01:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:21,793 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-19 08:01:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2023-11-19 08:01:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:21,794 INFO L225 Difference]: With dead ends: 34 [2023-11-19 08:01:21,794 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 08:01:21,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:21,796 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:21,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 08:01:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-11-19 08:01:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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) [2023-11-19 08:01:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-19 08:01:21,806 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2023-11-19 08:01:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:21,806 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-19 08:01:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-19 08:01:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-19 08:01:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 08:01:21,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:21,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:21,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:22,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:22,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2116548854, now seen corresponding path program 1 times [2023-11-19 08:01:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:22,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665456372] [2023-11-19 08:01:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:22,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:22,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612424786] [2023-11-19 08:01:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:22,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:22,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:22,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:22,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:01:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:22,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:01:22,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:22,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:22,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665456372] [2023-11-19 08:01:22,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612424786] [2023-11-19 08:01:22,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612424786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:22,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:22,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:22,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195478645] [2023-11-19 08:01:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:22,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:22,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:22,224 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:01:22,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:22,264 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2023-11-19 08:01:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:22,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 08:01:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:22,268 INFO L225 Difference]: With dead ends: 54 [2023-11-19 08:01:22,268 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 08:01:22,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:22,270 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:22,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 08:01:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-19 08:01:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2023-11-19 08:01:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-19 08:01:22,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2023-11-19 08:01:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:22,277 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-19 08:01:22,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 08:01:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-19 08:01:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 08:01:22,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:22,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:22,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:22,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:22,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -443588687, now seen corresponding path program 1 times [2023-11-19 08:01:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:22,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367162488] [2023-11-19 08:01:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:22,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:22,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396900802] [2023-11-19 08:01:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:22,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:22,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:22,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:22,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:01:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:22,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:01:22,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:01:22,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:01:22,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:22,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367162488] [2023-11-19 08:01:22,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:22,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396900802] [2023-11-19 08:01:22,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396900802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:22,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:22,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-11-19 08:01:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928194028] [2023-11-19 08:01:22,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:22,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:22,747 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:01:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:22,802 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-11-19 08:01:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-19 08:01:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:22,804 INFO L225 Difference]: With dead ends: 52 [2023-11-19 08:01:22,806 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 08:01:22,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:22,809 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:22,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 08:01:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-19 08:01:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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) [2023-11-19 08:01:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-19 08:01:22,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 22 [2023-11-19 08:01:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:22,826 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-19 08:01:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 08:01:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-19 08:01:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 08:01:22,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:22,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:22,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:23,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:23,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:23,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1151564580, now seen corresponding path program 1 times [2023-11-19 08:01:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:23,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361994811] [2023-11-19 08:01:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:23,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981673943] [2023-11-19 08:01:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:23,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:23,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:23,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:23,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:23,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:01:23,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:01:23,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361994811] [2023-11-19 08:01:23,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981673943] [2023-11-19 08:01:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981673943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:23,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:23,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:01:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780178702] [2023-11-19 08:01:23,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:23,206 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 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) [2023-11-19 08:01:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:23,235 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-19 08:01:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 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) Word has length 23 [2023-11-19 08:01:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:23,238 INFO L225 Difference]: With dead ends: 33 [2023-11-19 08:01:23,238 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 08:01:23,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:23,242 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 08:01:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 08:01:23,245 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) [2023-11-19 08:01:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 08:01:23,245 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2023-11-19 08:01:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:23,246 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 08:01:23,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 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) [2023-11-19 08:01:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 08:01:23,246 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 08:01:23,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 08:01:23,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:23,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-19 08:01:23,569 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-19 08:01:23,569 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2023-11-19 08:01:23,569 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-19 08:01:23,570 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 26 50) no Hoare annotation was computed. [2023-11-19 08:01:23,570 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2023-11-19 08:01:23,570 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (and (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) [2023-11-19 08:01:23,571 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2023-11-19 08:01:23,571 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-19 08:01:23,571 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and .cse0 .cse1 (= ~counter~0 1)) (and (<= 2 ~counter~0) .cse0 .cse1) (and (= |ULTIMATE.start_main_~b~0#1| 1) .cse0 (= ~counter~0 0) .cse1 (= |ULTIMATE.start_main_~B~0#1| 1)))) [2023-11-19 08:01:23,571 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-19 08:01:23,572 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2023-11-19 08:01:23,572 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 38 47) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and (= |ULTIMATE.start_main_~b~0#1| 1) .cse0 .cse1 (= |ULTIMATE.start_main_~B~0#1| 1)) (and (<= 2 ~counter~0) .cse0 .cse1))) [2023-11-19 08:01:23,572 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| 1) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2023-11-19 08:01:23,573 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2023-11-19 08:01:23,573 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-11-19 08:01:23,573 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2023-11-19 08:01:23,573 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2023-11-19 08:01:23,574 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 24) the Hoare annotation is: true [2023-11-19 08:01:23,574 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2023-11-19 08:01:23,574 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2023-11-19 08:01:23,574 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2023-11-19 08:01:23,580 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:23,606 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 08:01:23,628 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:01:23 BoogieIcfgContainer [2023-11-19 08:01:23,628 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 08:01:23,629 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 08:01:23,629 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 08:01:23,630 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 08:01:23,631 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:19" (3/4) ... [2023-11-19 08:01:23,633 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 08:01:23,651 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-19 08:01:23,658 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2023-11-19 08:01:23,658 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 08:01:23,659 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 08:01:23,659 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 08:01:23,782 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 08:01:23,782 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 08:01:23,783 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 08:01:23,783 INFO L158 Benchmark]: Toolchain (without parser) took 5182.44ms. Allocated memory is still 157.3MB. Free memory was 129.5MB in the beginning and 122.6MB in the end (delta: 6.9MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2023-11-19 08:01:23,784 INFO L158 Benchmark]: CDTParser took 1.08ms. Allocated memory is still 121.6MB. Free memory was 90.4MB in the beginning and 90.3MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:01:23,784 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.09ms. Allocated memory is still 157.3MB. Free memory was 129.3MB in the beginning and 121.3MB in the end (delta: 8.0MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2023-11-19 08:01:23,785 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.48ms. Allocated memory is still 157.3MB. Free memory was 121.3MB in the beginning and 119.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 08:01:23,786 INFO L158 Benchmark]: Boogie Preprocessor took 64.82ms. Allocated memory is still 157.3MB. Free memory was 119.8MB in the beginning and 118.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:01:23,786 INFO L158 Benchmark]: RCFGBuilder took 529.89ms. Allocated memory is still 157.3MB. Free memory was 118.6MB in the beginning and 108.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 08:01:23,787 INFO L158 Benchmark]: TraceAbstraction took 4020.47ms. Allocated memory is still 157.3MB. Free memory was 107.2MB in the beginning and 127.7MB in the end (delta: -20.5MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. [2023-11-19 08:01:23,787 INFO L158 Benchmark]: Witness Printer took 153.51ms. Allocated memory is still 157.3MB. Free memory was 127.7MB in the beginning and 122.6MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 08:01:23,790 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08ms. Allocated memory is still 121.6MB. Free memory was 90.4MB in the beginning and 90.3MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.09ms. Allocated memory is still 157.3MB. Free memory was 129.3MB in the beginning and 121.3MB in the end (delta: 8.0MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.48ms. Allocated memory is still 157.3MB. Free memory was 121.3MB in the beginning and 119.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.82ms. Allocated memory is still 157.3MB. Free memory was 119.8MB in the beginning and 118.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 529.89ms. Allocated memory is still 157.3MB. Free memory was 118.6MB in the beginning and 108.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4020.47ms. Allocated memory is still 157.3MB. Free memory was 107.2MB in the beginning and 127.7MB in the end (delta: -20.5MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. * Witness Printer took 153.51ms. Allocated memory is still 157.3MB. Free memory was 127.7MB in the beginning and 122.6MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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: 21]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 314 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 187 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83 IncrementalHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 127 mSDtfsCounter, 83 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 20 PreInvPairs, 26 NumberOfFragments, 82 HoareAnnotationTreeSize, 20 FomulaSimplifications, 18 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 261 SizeOfPredicates, 5 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 19/23 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: 38]: Loop Invariant Derived loop invariant: (((((b == 1) && (q == 0)) && (A == r)) && (B == 1)) || (((2 <= counter) && (q == 0)) && (A == r))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((q == 0) && (A == r)) && (counter == 1)) || (((2 <= counter) && (q == 0)) && (A == r))) || (((((b == 1) && (q == 0)) && (counter == 0)) && (A == r)) && (B == 1))) RESULT: Ultimate proved your program to be correct! [2023-11-19 08:01:23,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0192421b-cd1e-42ee-8db5-edb14f53321c/bin/uautomizer-verify-uCwYo4JHxu/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