./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:11:50,965 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:11:51,107 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:11:51,118 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:11:51,119 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:11:51,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:11:51,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:11:51,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:11:51,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:11:51,178 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:11:51,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:11:51,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:11:51,181 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:11:51,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:11:51,184 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:11:51,185 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:11:51,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:11:51,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:11:51,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:11:51,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:11:51,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:11:51,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:11:51,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:11:51,191 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:11:51,191 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:11:51,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:11:51,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:11:51,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:11:51,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:11:51,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:11:51,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:11:51,197 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:11:51,197 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:11:51,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:11:51,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:11:51,198 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:11:51,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:11:51,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:11:51,199 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:11:51,199 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_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e [2023-11-06 22:11:51,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:11:51,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:11:51,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:11:51,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:11:51,575 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:11:51,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/ldv-regression/test23-1.c [2023-11-06 22:11:55,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:11:55,272 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:11:55,273 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/sv-benchmarks/c/ldv-regression/test23-1.c [2023-11-06 22:11:55,280 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/data/83a103eb4/4d8a0d9869014208aeb39baeacfeb103/FLAG1dffff09b [2023-11-06 22:11:55,299 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/data/83a103eb4/4d8a0d9869014208aeb39baeacfeb103 [2023-11-06 22:11:55,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:11:55,304 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:11:55,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:11:55,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:11:55,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:11:55,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3c3e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55, skipping insertion in model container [2023-11-06 22:11:55,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,340 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:11:55,522 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_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2023-11-06 22:11:55,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:11:55,538 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:11:55,562 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_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2023-11-06 22:11:55,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:11:55,586 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:11:55,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55 WrapperNode [2023-11-06 22:11:55,587 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:11:55,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:11:55,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:11:55,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:11:55,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,636 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2023-11-06 22:11:55,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:11:55,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:11:55,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:11:55,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:11:55,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:11:55,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:11:55,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:11:55,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:11:55,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (1/1) ... [2023-11-06 22:11:55,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:11:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:55,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:11:55,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:11:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:11:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:11:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:11:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2023-11-06 22:11:55,762 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2023-11-06 22:11:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:11:55,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:11:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:11:55,858 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:11:55,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:11:56,089 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:11:56,105 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:11:56,105 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:11:56,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:56 BoogieIcfgContainer [2023-11-06 22:11:56,108 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:11:56,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:11:56,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:11:56,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:11:56,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:55" (1/3) ... [2023-11-06 22:11:56,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e352561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:56, skipping insertion in model container [2023-11-06 22:11:56,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:55" (2/3) ... [2023-11-06 22:11:56,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e352561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:56, skipping insertion in model container [2023-11-06 22:11:56,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:56" (3/3) ... [2023-11-06 22:11:56,122 INFO L112 eAbstractionObserver]: Analyzing ICFG test23-1.c [2023-11-06 22:11:56,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:11:56,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:11:56,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:11:56,252 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48497597, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:11:56,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:11:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:11:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:11:56,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:56,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:56,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:56,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1478003781, now seen corresponding path program 1 times [2023-11-06 22:11:56,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:56,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862276505] [2023-11-06 22:11:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:56,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 22:11:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:56,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:11:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862276505] [2023-11-06 22:11:56,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862276505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:56,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:56,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528701209] [2023-11-06 22:11:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:56,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:11:56,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:11:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:11:56,880 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:11:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:56,901 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-06 22:11:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:11:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-06 22:11:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:56,910 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:11:56,910 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:11:56,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:11:56,919 INFO L413 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:56,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:11:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:11:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 22:11:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:11:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-06 22:11:56,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 19 [2023-11-06 22:11:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:56,965 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-06 22:11:56,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:11:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-06 22:11:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:11:56,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:56,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:56,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:11:56,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:56,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1220515189, now seen corresponding path program 1 times [2023-11-06 22:11:56,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:56,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982503227] [2023-11-06 22:11:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:56,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:57,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 22:11:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:57,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:11:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982503227] [2023-11-06 22:11:57,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982503227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:57,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:57,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:11:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025419847] [2023-11-06 22:11:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:57,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:57,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:57,733 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:11:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:57,784 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-06 22:11:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-06 22:11:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:57,786 INFO L225 Difference]: With dead ends: 25 [2023-11-06 22:11:57,786 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 22:11:57,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:11:57,788 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:57,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:11:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 22:11:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 22:11:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:11:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-06 22:11:57,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 20 [2023-11-06 22:11:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:57,796 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-06 22:11:57,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:11:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-06 22:11:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:11:57,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:57,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:11:57,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:57,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1898823162, now seen corresponding path program 1 times [2023-11-06 22:11:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844866752] [2023-11-06 22:11:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:57,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:58,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 22:11:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:11:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:58,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844866752] [2023-11-06 22:11:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844866752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505161916] [2023-11-06 22:11:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:58,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:58,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:11:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:58,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:11:58,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:58,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2023-11-06 22:11:58,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 22:11:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:58,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:58,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505161916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:58,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:58,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-06 22:11:58,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430576276] [2023-11-06 22:11:58,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:58,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:11:58,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:11:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:11:58,940 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:11:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:59,093 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-06 22:11:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:11:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-06 22:11:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:59,097 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:11:59,097 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 22:11:59,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:11:59,103 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:59,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 22:11:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 22:11:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:11:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-06 22:11:59,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2023-11-06 22:11:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:59,118 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-06 22:11:59,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:11:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-06 22:11:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:11:59,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:59,121 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:59,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:59,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:59,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:59,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -974313463, now seen corresponding path program 2 times [2023-11-06 22:11:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:59,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3531299] [2023-11-06 22:11:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 22:11:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:11:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:11:59,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:59,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3531299] [2023-11-06 22:11:59,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3531299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375517965] [2023-11-06 22:11:59,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:59,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:59,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:59,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:11:59,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:59,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:59,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:11:59,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:59,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2023-11-06 22:12:00,107 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:12:00,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 12 [2023-11-06 22:12:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:12:00,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:12:00,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375517965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:00,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:00,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-11-06 22:12:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432818565] [2023-11-06 22:12:00,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:00,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:12:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:00,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:12:00,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:12:00,238 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:12:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:00,484 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-06 22:12:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:12:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-06 22:12:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:00,486 INFO L225 Difference]: With dead ends: 43 [2023-11-06 22:12:00,486 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:12:00,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:12:00,488 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:00,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 96 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:12:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:12:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-06 22:12:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:12:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-11-06 22:12:00,498 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 28 [2023-11-06 22:12:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:00,498 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-11-06 22:12:00,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:12:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-11-06 22:12:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:12:00,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:00,500 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:00,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:12:00,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:00,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:00,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash 638604903, now seen corresponding path program 3 times [2023-11-06 22:12:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:00,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729692786] [2023-11-06 22:12:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 22:12:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:01,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 22:12:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:12:01,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:01,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729692786] [2023-11-06 22:12:01,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729692786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031828779] [2023-11-06 22:12:01,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:12:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:01,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:01,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:12:01,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-06 22:12:01,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:01,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:12:01,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:01,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-06 22:12:02,285 INFO L322 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2023-11-06 22:12:02,286 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 23 [2023-11-06 22:12:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:12:02,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:12:02,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031828779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:02,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:02,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2023-11-06 22:12:02,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514555857] [2023-11-06 22:12:02,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:02,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:12:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:02,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:12:02,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:12:02,575 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:12:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:03,078 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-06 22:12:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:12:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-06 22:12:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:03,080 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:12:03,080 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 22:12:03,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:12:03,082 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:03,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:12:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 22:12:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-06 22:12:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:12:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-06 22:12:03,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 40 [2023-11-06 22:12:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:03,096 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-06 22:12:03,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:12:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-06 22:12:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:12:03,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:03,098 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:03,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:03,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:03,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:03,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1028786796, now seen corresponding path program 4 times [2023-11-06 22:12:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744709130] [2023-11-06 22:12:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:03,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:03,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:03,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:03,382 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:03,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 22:12:03,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:12:03,389 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-11-06 22:12:03,393 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:12:03,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:12:03 BoogieIcfgContainer [2023-11-06 22:12:03,463 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:12:03,463 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:12:03,464 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:12:03,464 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:12:03,464 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:56" (3/4) ... [2023-11-06 22:12:03,465 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 22:12:03,531 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:12:03,531 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:12:03,531 INFO L158 Benchmark]: Toolchain (without parser) took 8227.38ms. Allocated memory was 163.6MB in the beginning and 205.5MB in the end (delta: 41.9MB). Free memory was 118.5MB in the beginning and 63.2MB in the end (delta: 55.3MB). Peak memory consumption was 100.3MB. Max. memory is 16.1GB. [2023-11-06 22:12:03,532 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 89.1MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:12:03,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.84ms. Allocated memory is still 163.6MB. Free memory was 117.9MB in the beginning and 106.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:12:03,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.49ms. Allocated memory is still 163.6MB. Free memory was 106.9MB in the beginning and 105.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:12:03,533 INFO L158 Benchmark]: Boogie Preprocessor took 42.27ms. Allocated memory is still 163.6MB. Free memory was 105.4MB in the beginning and 104.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:12:03,533 INFO L158 Benchmark]: RCFGBuilder took 427.68ms. Allocated memory is still 163.6MB. Free memory was 104.3MB in the beginning and 92.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 22:12:03,533 INFO L158 Benchmark]: TraceAbstraction took 7351.16ms. Allocated memory was 163.6MB in the beginning and 205.5MB in the end (delta: 41.9MB). Free memory was 91.2MB in the beginning and 67.4MB in the end (delta: 23.8MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. [2023-11-06 22:12:03,534 INFO L158 Benchmark]: Witness Printer took 67.31ms. Allocated memory is still 205.5MB. Free memory was 67.4MB in the beginning and 63.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 22:12:03,537 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 89.1MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.84ms. Allocated memory is still 163.6MB. Free memory was 117.9MB in the beginning and 106.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.49ms. Allocated memory is still 163.6MB. Free memory was 106.9MB in the beginning and 105.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.27ms. Allocated memory is still 163.6MB. Free memory was 105.4MB in the beginning and 104.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 427.68ms. Allocated memory is still 163.6MB. Free memory was 104.3MB in the beginning and 92.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7351.16ms. Allocated memory was 163.6MB in the beginning and 205.5MB in the end (delta: 41.9MB). Free memory was 91.2MB in the beginning and 67.4MB in the end (delta: 23.8MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. * Witness Printer took 67.31ms. Allocated memory is still 205.5MB. Free memory was 67.4MB in the beginning and 63.2MB in the end (delta: 4.2MB). 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 - CounterExampleResult [Line: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] struct dummy d1, d2; VAL [d1={4:0}, d2={5:0}] [L35] CALL init() [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L35] RET init() [L36] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}] [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L36] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}, pd1={4:0}] [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-10, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-9, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-9, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-8, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-8, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-7, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-7, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-6, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-6, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-5, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-5, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-4, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-4, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-3, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-3, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-2, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-2, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-1, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=-1, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=0, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=0, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=1, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=0, d1={4:0}, d2={5:0}, i=1, pa={4:8}, pd1={4:0}, pd2={4:0}] [L42] COND FALSE !(i <= *pa) [L45] CALL, EXPR check(pd2, i) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] RET, EXPR check(pd2, i) [L45] COND TRUE !check(pd2, i) [L52] reach_error() VAL [d1={4:0}, d2={5:0}, i=1, pa={4:8}, pd1={4:0}, pd2={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 340 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 248 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 196 IncrementalHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 92 mSDtfsCounter, 196 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 166 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, InterpolantAutomatonStates: 62, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 2259 SizeOfPredicates, 36 NumberOfNonLiveVariables, 480 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 33/429 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 RESULT: Ultimate proved your program to be incorrect! [2023-11-06 22:12:03,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_800ae3f9-68fa-472d-8daf-ec9d357e5e2b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE