./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test25-1.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_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/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_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/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_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/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 de251549242251e9f54823879039d01198e32edde0d5daa52ae9e52ec83fdcc8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:47,245 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:47,361 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:47,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:47,372 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:47,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:47,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:47,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:47,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:47,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:47,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:47,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:47,428 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:47,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:47,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:47,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:47,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:47,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:47,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:47,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:47,434 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:47,434 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:47,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:47,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:47,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:47,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:47,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:47,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:47,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:47,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:47,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:47,442 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:47,442 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:47,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:47,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:47,443 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:47,443 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:47,443 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:47,443 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:47,444 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_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de251549242251e9f54823879039d01198e32edde0d5daa52ae9e52ec83fdcc8 [2023-11-06 21:53:47,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:47,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:47,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:47,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:47,806 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:47,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/ldv-regression/test25-1.c [2023-11-06 21:53:51,049 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:51,246 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:51,247 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/sv-benchmarks/c/ldv-regression/test25-1.c [2023-11-06 21:53:51,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/data/664bb6009/77290419a0ca4c7fa60d1762e5d5aa2f/FLAGe65a2ef0a [2023-11-06 21:53:51,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/data/664bb6009/77290419a0ca4c7fa60d1762e5d5aa2f [2023-11-06 21:53:51,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:51,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:51,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:51,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:51,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:51,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfa9322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51, skipping insertion in model container [2023-11-06 21:53:51,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:51,533 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_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2023-11-06 21:53:51,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:51,553 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:51,584 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_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2023-11-06 21:53:51,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:51,610 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:51,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51 WrapperNode [2023-11-06 21:53:51,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:51,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:51,613 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:51,613 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:51,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,676 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2023-11-06 21:53:51,677 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:51,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:51,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:51,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:51,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:51,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:51,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:51,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:51,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (1/1) ... [2023-11-06 21:53:51,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:51,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:51,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:51,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:53:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:53:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:51,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:51,940 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:51,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:52,129 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:52,136 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:52,137 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:53:52,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:52 BoogieIcfgContainer [2023-11-06 21:53:52,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:52,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:52,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:52,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:52,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:51" (1/3) ... [2023-11-06 21:53:52,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a42a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:52, skipping insertion in model container [2023-11-06 21:53:52,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:51" (2/3) ... [2023-11-06 21:53:52,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a42a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:52, skipping insertion in model container [2023-11-06 21:53:52,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:52" (3/3) ... [2023-11-06 21:53:52,150 INFO L112 eAbstractionObserver]: Analyzing ICFG test25-1.c [2023-11-06 21:53:52,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:52,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:52,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:52,230 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;@78dbe317, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:52,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:53:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:53:52,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:52,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:52,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:52,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash 621535585, now seen corresponding path program 1 times [2023-11-06 21:53:52,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418917337] [2023-11-06 21:53:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:52,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418917337] [2023-11-06 21:53:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418917337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:52,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:52,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166892691] [2023-11-06 21:53:52,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:52,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:52,604 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:52,641 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-11-06 21:53:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2023-11-06 21:53:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:52,652 INFO L225 Difference]: With dead ends: 34 [2023-11-06 21:53:52,652 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 21:53:52,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:52,659 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:52,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 21:53:52,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2023-11-06 21:53:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-06 21:53:52,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2023-11-06 21:53:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:52,694 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-06 21:53:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-06 21:53:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:53:52,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:52,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:52,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:52,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:52,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash -697909696, now seen corresponding path program 1 times [2023-11-06 21:53:52,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073090926] [2023-11-06 21:53:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:52,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:52,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073090926] [2023-11-06 21:53:52,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073090926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345992606] [2023-11-06 21:53:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:52,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:52,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:52,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:53:52,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:53,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:53,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345992606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:53,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 21:53:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605158467] [2023-11-06 21:53:53,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:53:53,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:53:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:53:53,054 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:53,102 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-06 21:53:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:53:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) Word has length 14 [2023-11-06 21:53:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:53,105 INFO L225 Difference]: With dead ends: 31 [2023-11-06 21:53:53,105 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 21:53:53,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:53:53,108 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:53,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 21:53:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 21:53:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-06 21:53:53,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2023-11-06 21:53:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:53,118 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-06 21:53:53,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-06 21:53:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 21:53:53,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:53,120 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:53,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:53,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:53,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1008332474, now seen corresponding path program 2 times [2023-11-06 21:53:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:53,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61648369] [2023-11-06 21:53:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:53,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61648369] [2023-11-06 21:53:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61648369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779776054] [2023-11-06 21:53:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:53,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:53,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:53,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:53,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:53:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:53,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:53:53,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:54,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:53:54,030 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 49 treesize of output 26 [2023-11-06 21:53:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:53:54,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779776054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:54,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:53:54,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-06 21:53:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163854459] [2023-11-06 21:53:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:54,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:54,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:53:54,120 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:54,197 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-11-06 21:53:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) Word has length 20 [2023-11-06 21:53:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:54,202 INFO L225 Difference]: With dead ends: 28 [2023-11-06 21:53:54,202 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:53:54,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:53:54,206 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:54,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:53:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 21:53:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-06 21:53:54,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2023-11-06 21:53:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:54,219 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-06 21:53:54,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-06 21:53:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 21:53:54,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:54,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:54,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:54,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 21:53:54,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:54,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1130070165, now seen corresponding path program 1 times [2023-11-06 21:53:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83172844] [2023-11-06 21:53:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:53:54,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83172844] [2023-11-06 21:53:54,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83172844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024233435] [2023-11-06 21:53:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:54,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:54,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:54,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:53:54,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:53:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024233435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:54,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:54,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 21:53:54,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450142203] [2023-11-06 21:53:54,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:53:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:54,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:53:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:53:54,931 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:55,015 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-11-06 21:53:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:53:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) Word has length 22 [2023-11-06 21:53:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:55,017 INFO L225 Difference]: With dead ends: 47 [2023-11-06 21:53:55,018 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 21:53:55,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:53:55,021 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:55,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 21:53:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-06 21:53:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-11-06 21:53:55,032 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 22 [2023-11-06 21:53:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:55,033 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-11-06 21:53:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-11-06 21:53:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 21:53:55,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:55,035 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:55,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:55,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:55,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:55,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2037252873, now seen corresponding path program 2 times [2023-11-06 21:53:55,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:55,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324019313] [2023-11-06 21:53:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:59,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:59,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324019313] [2023-11-06 21:53:59,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324019313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:59,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769484169] [2023-11-06 21:53:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:59,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:59,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:59,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:59,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:59,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:59,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 21:53:59,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:00,568 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 25 treesize of output 9 [2023-11-06 21:54:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:00,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:00,715 INFO L322 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-11-06 21:54:00,716 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 18 treesize of output 18 [2023-11-06 21:54:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 21:54:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769484169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:00,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:00,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 6] total 34 [2023-11-06 21:54:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034817782] [2023-11-06 21:54:00,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:00,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 21:54:00,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:00,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 21:54:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 21:54:00,774 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:01,543 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2023-11-06 21:54:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:54:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 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) Word has length 34 [2023-11-06 21:54:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:01,545 INFO L225 Difference]: With dead ends: 46 [2023-11-06 21:54:01,545 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 21:54:01,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 21:54:01,547 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:01,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 93 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:54:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 21:54:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-06 21:54:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-11-06 21:54:01,557 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 34 [2023-11-06 21:54:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:01,557 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-11-06 21:54:01,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-11-06 21:54:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 21:54:01,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:01,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:01,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:01,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:01,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:01,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1151373594, now seen corresponding path program 3 times [2023-11-06 21:54:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:01,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120759743] [2023-11-06 21:54:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:54:06,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:06,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120759743] [2023-11-06 21:54:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120759743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:06,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765147821] [2023-11-06 21:54:06,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:06,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:06,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:06,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:06,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:54:07,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 21:54:07,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:07,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:54:07,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:07,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:54:07,477 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 49 treesize of output 26 [2023-11-06 21:54:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 21:54:07,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:07,634 INFO L322 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-11-06 21:54:07,634 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 18 treesize of output 18 [2023-11-06 21:54:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 21:54:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765147821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:07,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 28 [2023-11-06 21:54:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859227059] [2023-11-06 21:54:07,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:54:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:07,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:54:07,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:54:07,656 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:08,764 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-06 21:54:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 21:54:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 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) Word has length 40 [2023-11-06 21:54:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:08,766 INFO L225 Difference]: With dead ends: 58 [2023-11-06 21:54:08,766 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 21:54:08,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 21:54:08,768 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:08,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 57 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:54:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 21:54:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-06 21:54:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-06 21:54:08,782 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 40 [2023-11-06 21:54:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:08,782 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-06 21:54:08,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-06 21:54:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:54:08,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:08,785 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:08,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:08,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:08,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1359246596, now seen corresponding path program 4 times [2023-11-06 21:54:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644485476] [2023-11-06 21:54:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:09,101 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:54:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:09,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:54:09,224 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:54:09,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 21:54:09,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:54:09,232 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1] [2023-11-06 21:54:09,237 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:54:09,289 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-06 21:54:09,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:54:09 BoogieIcfgContainer [2023-11-06 21:54:09,321 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:54:09,321 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:54:09,321 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:54:09,322 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:54:09,323 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:52" (3/4) ... [2023-11-06 21:54:09,324 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 21:54:09,348 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-06 21:54:09,410 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 21:54:09,410 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:54:09,411 INFO L158 Benchmark]: Toolchain (without parser) took 18139.72ms. Allocated memory was 163.6MB in the beginning and 358.6MB in the end (delta: 195.0MB). Free memory was 118.3MB in the beginning and 193.8MB in the end (delta: -75.5MB). Peak memory consumption was 121.4MB. Max. memory is 16.1GB. [2023-11-06 21:54:09,411 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 123.7MB. Free memory was 86.1MB in the beginning and 86.1MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:54:09,413 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.92ms. Allocated memory is still 163.6MB. Free memory was 118.3MB in the beginning and 107.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:54:09,414 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.91ms. Allocated memory is still 163.6MB. Free memory was 107.0MB in the beginning and 105.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:54:09,415 INFO L158 Benchmark]: Boogie Preprocessor took 52.44ms. Allocated memory is still 163.6MB. Free memory was 105.6MB in the beginning and 104.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:54:09,415 INFO L158 Benchmark]: RCFGBuilder took 408.44ms. Allocated memory is still 163.6MB. Free memory was 103.6MB in the beginning and 91.8MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:54:09,416 INFO L158 Benchmark]: TraceAbstraction took 17178.24ms. Allocated memory was 163.6MB in the beginning and 358.6MB in the end (delta: 195.0MB). Free memory was 91.0MB in the beginning and 197.9MB in the end (delta: -106.9MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. [2023-11-06 21:54:09,416 INFO L158 Benchmark]: Witness Printer took 88.69ms. Allocated memory is still 358.6MB. Free memory was 197.9MB in the beginning and 193.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 21:54:09,419 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 123.7MB. Free memory was 86.1MB in the beginning and 86.1MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.92ms. Allocated memory is still 163.6MB. Free memory was 118.3MB in the beginning and 107.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.91ms. Allocated memory is still 163.6MB. Free memory was 107.0MB in the beginning and 105.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.44ms. Allocated memory is still 163.6MB. Free memory was 105.6MB in the beginning and 104.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 408.44ms. Allocated memory is still 163.6MB. Free memory was 103.6MB in the beginning and 91.8MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 17178.24ms. Allocated memory was 163.6MB in the beginning and 358.6MB in the end (delta: 195.0MB). Free memory was 91.0MB in the beginning and 197.9MB in the end (delta: -106.9MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. * Witness Printer took 88.69ms. Allocated memory is still 358.6MB. Free memory was 197.9MB in the beginning and 193.8MB 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; VAL [array={6:0}, cont={5:0}, i=1, j=0] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=1] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=2] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=3] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=4] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=5] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=6] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=7] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=8] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=9] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={6:0}, cont={5:0}, i=1, j=10] [L26] COND FALSE !(j < 10) VAL [array={6:0}, cont={5:0}, i=1, j=10] [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b VAL [array={6:0}, cont.array={6:8}, cont.array[0].b=17, cont={5:0}, i=1, pa={6:12}] [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=7, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=8, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=8, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=9, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=9, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=10, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=10, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=11, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=11, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=12, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=12, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=13, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=13, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=14, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=14, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=15, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=15, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=16, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=16, pa={6:12}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={6:0}, cont={5:0}, i=17, pa={6:12}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={6:0}, cont={5:0}, i=17, pa={6:12}] [L36] COND FALSE !(i < *pa) [L39] CALL, EXPR check(&cont, i) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] RET, EXPR check(&cont, i) [L39] COND TRUE !check(&cont, i) [L47] reach_error() VAL [array={6:0}, cont={5:0}, i=17, pa={6:12}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.0s, OverallIterations: 7, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 293 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 940 IncrementalHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 70 mSDtfsCounter, 940 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=6, InterpolantAutomatonStates: 81, 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, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 323 NumberOfCodeBlocks, 303 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 366 ConstructedInterpolants, 0 QuantifiedInterpolants, 1850 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1081 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 339/755 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 21:54:09,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9ae446-e6ca-4a38-a80d-93e6596cc1c2/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