./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test22-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test22-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc --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 e1ce1c36cc17bb5fac8e93fbe54fbc2a77334d62ad40c06c722f9da96af2516f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:48:00,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:48:00,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:48:00,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:48:00,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:48:00,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:48:00,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:48:00,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:48:00,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:48:00,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:48:00,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:48:00,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:48:00,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:48:00,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:48:00,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:48:00,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:48:00,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:48:00,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:48:00,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:48:00,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:48:00,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:48:00,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:48:00,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:48:00,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:48:00,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:48:00,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:48:00,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:48:00,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:48:00,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:48:00,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:48:00,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:48:00,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:48:00,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:48:00,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:48:00,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:48:00,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:48:00,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:48:00,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:48:00,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:48:00,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:48:00,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:48:00,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:48:00,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:48:00,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:48:00,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:48:00,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:48:00,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:48:00,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:48:00,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:48:00,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:48:00,406 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:48:00,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:48:00,408 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:48:00,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:48:00,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:48:00,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:48:00,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:48:00,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:48:00,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:48:00,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:48:00,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:48:00,411 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:48:00,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:48:00,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:48:00,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:48:00,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:48:00,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:48:00,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:48:00,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:48:00,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:48:00,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:48:00,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:48:00,414 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:48:00,414 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:48:00,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:48:00,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1ce1c36cc17bb5fac8e93fbe54fbc2a77334d62ad40c06c722f9da96af2516f [2022-11-02 20:48:00,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:48:00,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:48:00,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:48:00,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:48:00,872 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:48:00,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-regression/test22-1.c [2022-11-02 20:48:00,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/data/409ca8060/5c598ad43e48449cae287070caf3758d/FLAGc39b1db34 [2022-11-02 20:48:01,527 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:48:01,528 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/sv-benchmarks/c/ldv-regression/test22-1.c [2022-11-02 20:48:01,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/data/409ca8060/5c598ad43e48449cae287070caf3758d/FLAGc39b1db34 [2022-11-02 20:48:01,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/data/409ca8060/5c598ad43e48449cae287070caf3758d [2022-11-02 20:48:01,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:48:01,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:48:01,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:48:01,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:48:01,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:48:01,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:48:01" (1/1) ... [2022-11-02 20:48:01,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6d920e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:01, skipping insertion in model container [2022-11-02 20:48:01,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:48:01" (1/1) ... [2022-11-02 20:48:01,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:48:01,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:48:02,171 WARN L230 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_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2022-11-02 20:48:02,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:48:02,186 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:48:02,206 WARN L230 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_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2022-11-02 20:48:02,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:48:02,222 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:48:02,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02 WrapperNode [2022-11-02 20:48:02,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:48:02,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:48:02,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:48:02,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:48:02,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,268 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2022-11-02 20:48:02,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:48:02,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:48:02,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:48:02,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:48:02,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,305 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:48:02,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:48:02,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:48:02,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:48:02,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (1/1) ... [2022-11-02 20:48:02,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:48:02,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:02,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:48:02,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:48:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:48:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:48:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:48:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2022-11-02 20:48:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2022-11-02 20:48:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:48:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:48:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:48:02,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:48:02,457 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:48:02,718 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:48:02,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:48:02,725 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:48:02,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:48:02 BoogieIcfgContainer [2022-11-02 20:48:02,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:48:02,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:48:02,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:48:02,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:48:02,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:48:01" (1/3) ... [2022-11-02 20:48:02,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d882b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:48:02, skipping insertion in model container [2022-11-02 20:48:02,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:48:02" (2/3) ... [2022-11-02 20:48:02,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d882b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:48:02, skipping insertion in model container [2022-11-02 20:48:02,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:48:02" (3/3) ... [2022-11-02 20:48:02,738 INFO L112 eAbstractionObserver]: Analyzing ICFG test22-1.c [2022-11-02 20:48:02,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:48:02,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:48:02,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:48:02,826 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;@1e98f76f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:48:02,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:48:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:48:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:48:02,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:02,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:02,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -911093318, now seen corresponding path program 1 times [2022-11-02 20:48:02,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:02,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538912087] [2022-11-02 20:48:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:02,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:03,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:03,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:48:03,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:03,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538912087] [2022-11-02 20:48:03,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538912087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:03,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:48:03,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:48:03,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733819920] [2022-11-02 20:48:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:03,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:48:03,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:48:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:48:03,300 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:48:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:03,334 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-02 20:48:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:48:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 20:48:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:03,346 INFO L225 Difference]: With dead ends: 35 [2022-11-02 20:48:03,346 INFO L226 Difference]: Without dead ends: 22 [2022-11-02 20:48:03,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:48:03,356 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:03,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:48:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-02 20:48:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-02 20:48:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:48:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-02 20:48:03,415 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2022-11-02 20:48:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:03,418 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-02 20:48:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:48:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-02 20:48:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:48:03,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:03,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:03,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:48:03,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1614870372, now seen corresponding path program 1 times [2022-11-02 20:48:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:03,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521198971] [2022-11-02 20:48:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:03,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:48:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521198971] [2022-11-02 20:48:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521198971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016662834] [2022-11-02 20:48:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:04,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:04,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:04,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:04,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:48:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:48:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:05,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:48:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:05,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:05,160 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:48:05,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 13 [2022-11-02 20:48:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:48:05,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016662834] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:05,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:48:05,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 16] total 26 [2022-11-02 20:48:05,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892847266] [2022-11-02 20:48:05,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:48:05,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:48:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:48:05,238 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:48:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:05,320 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-02 20:48:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:48:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-02 20:48:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:05,321 INFO L225 Difference]: With dead ends: 30 [2022-11-02 20:48:05,322 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:48:05,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:48:05,323 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:48:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:48:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 20:48:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:48:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-02 20:48:05,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-11-02 20:48:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:05,331 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-02 20:48:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:48:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-02 20:48:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:48:05,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:05,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:05,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:48:05,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:05,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1377934871, now seen corresponding path program 1 times [2022-11-02 20:48:05,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302666553] [2022-11-02 20:48:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:05,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:06,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:48:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:06,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302666553] [2022-11-02 20:48:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302666553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159380986] [2022-11-02 20:48:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:06,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:06,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:06,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:06,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:48:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:48:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:06,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:48:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:06,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:06,720 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:48:06,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 13 [2022-11-02 20:48:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:48:06,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159380986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:48:06,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:48:06,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 7] total 29 [2022-11-02 20:48:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922888849] [2022-11-02 20:48:06,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:06,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:48:06,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:48:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:48:06,805 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 24 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:48:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:08,371 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-11-02 20:48:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:48:08,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 24 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2022-11-02 20:48:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:08,378 INFO L225 Difference]: With dead ends: 71 [2022-11-02 20:48:08,378 INFO L226 Difference]: Without dead ends: 61 [2022-11-02 20:48:08,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 20:48:08,384 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:08,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 267 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:48:08,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-02 20:48:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-11-02 20:48:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-02 20:48:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-02 20:48:08,408 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 31 [2022-11-02 20:48:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:08,409 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-02 20:48:08,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 24 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:48:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-02 20:48:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:48:08,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:08,411 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:08,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 20:48:08,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:48:08,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash -772238856, now seen corresponding path program 2 times [2022-11-02 20:48:08,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:08,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813731294] [2022-11-02 20:48:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:09,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:48:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813731294] [2022-11-02 20:48:09,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813731294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585856211] [2022-11-02 20:48:09,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:48:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:09,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:09,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:48:09,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:48:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:09,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:48:09,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:10,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:48:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:48:10,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:10,350 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:48:10,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 13 [2022-11-02 20:48:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:48:10,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585856211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:48:10,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:48:10,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 10] total 37 [2022-11-02 20:48:10,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271981192] [2022-11-02 20:48:10,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:10,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:48:10,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:48:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:48:10,438 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 33 states have internal predecessors, (66), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:48:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:13,259 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-11-02 20:48:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 20:48:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 33 states have internal predecessors, (66), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 37 [2022-11-02 20:48:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:13,261 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:48:13,261 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:48:13,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1387, Invalid=5753, Unknown=0, NotChecked=0, Total=7140 [2022-11-02 20:48:13,266 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 182 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:13,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 268 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:48:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:48:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2022-11-02 20:48:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-02 20:48:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-11-02 20:48:13,282 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 37 [2022-11-02 20:48:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:13,283 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-11-02 20:48:13,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 33 states have internal predecessors, (66), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:48:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-11-02 20:48:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:48:13,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:13,285 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:13,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:13,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:13,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1758737322, now seen corresponding path program 3 times [2022-11-02 20:48:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688874330] [2022-11-02 20:48:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:14,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:14,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:14,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 113 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:48:14,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688874330] [2022-11-02 20:48:14,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688874330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988275588] [2022-11-02 20:48:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:48:14,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:14,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:14,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:48:14,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:48:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:48:14,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:15,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 23 [2022-11-02 20:48:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-02 20:48:15,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:15,950 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:48:15,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 31 [2022-11-02 20:48:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-02 20:48:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988275588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:48:16,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:48:16,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 15] total 40 [2022-11-02 20:48:16,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340334643] [2022-11-02 20:48:16,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:16,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:48:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:48:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:48:16,396 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-02 20:48:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:21,493 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2022-11-02 20:48:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-02 20:48:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2022-11-02 20:48:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:21,495 INFO L225 Difference]: With dead ends: 163 [2022-11-02 20:48:21,495 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:48:21,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1116, Invalid=11316, Unknown=0, NotChecked=0, Total=12432 [2022-11-02 20:48:21,504 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:21,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 410 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:48:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:48:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 49. [2022-11-02 20:48:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:48:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-02 20:48:21,519 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 49 [2022-11-02 20:48:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:21,520 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-02 20:48:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 35 states have internal predecessors, (71), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-02 20:48:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-02 20:48:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:48:21,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:21,522 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:21,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:21,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -290973603, now seen corresponding path program 1 times [2022-11-02 20:48:21,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:21,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394059106] [2022-11-02 20:48:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:21,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-02 20:48:21,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394059106] [2022-11-02 20:48:21,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394059106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669632167] [2022-11-02 20:48:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:21,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:21,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:21,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:48:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:48:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-02 20:48:22,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-02 20:48:22,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669632167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:48:22,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:48:22,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2022-11-02 20:48:22,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792873886] [2022-11-02 20:48:22,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:22,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:48:22,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:48:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:48:22,650 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 30 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 23 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:48:23,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:23,102 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-11-02 20:48:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:48:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 23 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 51 [2022-11-02 20:48:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:23,105 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:48:23,105 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:48:23,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:48:23,110 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:23,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 281 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:48:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:48:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-02 20:48:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:48:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-11-02 20:48:23,137 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 51 [2022-11-02 20:48:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:23,138 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-11-02 20:48:23,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 23 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:48:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-11-02 20:48:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:48:23,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:23,145 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:23,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:48:23,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1067708707, now seen corresponding path program 2 times [2022-11-02 20:48:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:23,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330975274] [2022-11-02 20:48:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:23,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:23,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-02 20:48:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330975274] [2022-11-02 20:48:23,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330975274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791302896] [2022-11-02 20:48:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:48:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:23,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:23,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:48:23,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:48:23,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:23,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:48:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-02 20:48:23,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-02 20:48:24,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791302896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:48:24,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:48:24,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 25 [2022-11-02 20:48:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575844659] [2022-11-02 20:48:24,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:48:24,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:48:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:48:24,113 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 20:48:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:24,414 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-11-02 20:48:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:48:24,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-11-02 20:48:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:24,418 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:48:24,418 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:48:24,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:48:24,420 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:24,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 155 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:48:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:48:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-02 20:48:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:48:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-02 20:48:24,460 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 51 [2022-11-02 20:48:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:24,460 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-02 20:48:24,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 20:48:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-02 20:48:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:48:24,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:24,464 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:24,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:24,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:48:24,690 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -644061985, now seen corresponding path program 3 times [2022-11-02 20:48:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209274716] [2022-11-02 20:48:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:48:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:48:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 122 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:48:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209274716] [2022-11-02 20:48:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209274716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158754737] [2022-11-02 20:48:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:48:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:25,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:25,581 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:48:25,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:48:25,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:48:25,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:26,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-11-02 20:48:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-02 20:48:26,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:26,986 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:48:26,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 31 [2022-11-02 20:48:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-02 20:48:27,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158754737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:48:27,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:48:27,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 11] total 44 [2022-11-02 20:48:27,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191595412] [2022-11-02 20:48:27,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:48:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:48:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:48:27,219 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 44 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 40 states have internal predecessors, (78), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:48:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:29,844 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-02 20:48:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:48:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 40 states have internal predecessors, (78), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 51 [2022-11-02 20:48:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:29,849 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:48:29,849 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 20:48:29,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=939, Invalid=4173, Unknown=0, NotChecked=0, Total=5112 [2022-11-02 20:48:29,850 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:29,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 202 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:48:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 20:48:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 20:48:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 20:48:29,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2022-11-02 20:48:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:29,852 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:48:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 40 states have internal predecessors, (78), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:48:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 20:48:29,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 20:48:29,856 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 20:48:29,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-02 20:48:30,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:30,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-02 20:48:33,252 INFO L899 garLoopResultBuilder]: For program point get_dummyFINAL(lines 22 25) no Hoare annotation was computed. [2022-11-02 20:48:33,253 INFO L902 garLoopResultBuilder]: At program point get_dummyENTRY(lines 22 25) the Hoare annotation is: true [2022-11-02 20:48:33,253 INFO L899 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-11-02 20:48:33,254 INFO L899 garLoopResultBuilder]: For program point get_dummyEXIT(lines 22 25) no Hoare annotation was computed. [2022-11-02 20:48:33,257 INFO L895 garLoopResultBuilder]: At program point L35-2(line 35) the Hoare annotation is: (let ((.cse0 (= |~#d1~0.offset| 0))) (or (and (= |~#d1~0.offset| |ULTIMATE.start_main_~pd1~0#1.offset|) (= 4 |ULTIMATE.start_main_~pd1~0#1.base|) (= |~#d1~0.base| |ULTIMATE.start_main_~pd1~0#1.base|) .cse0 (<= 5 |~#d2~0.base|)) (and (= |~#d2~0.offset| |ULTIMATE.start_main_~pd1~0#1.offset|) (= |~#d2~0.offset| 0) (= |~#d1~0.base| 4) (= 5 |ULTIMATE.start_main_~pd1~0#1.base|) (= 5 |~#d2~0.base|) .cse0))) [2022-11-02 20:48:33,257 INFO L899 garLoopResultBuilder]: For program point L37-4(lines 37 46) no Hoare annotation was computed. [2022-11-02 20:48:33,258 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-02 20:48:33,258 INFO L899 garLoopResultBuilder]: For program point L35-3(line 35) no Hoare annotation was computed. [2022-11-02 20:48:33,258 INFO L895 garLoopResultBuilder]: At program point L35-4(line 35) the Hoare annotation is: (let ((.cse1 (= |~#d1~0.base| 4)) (.cse2 (= 5 |ULTIMATE.start_main_~pd1~0#1.base|)) (.cse3 (= 5 |~#d2~0.base|)) (.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse6 (= |ULTIMATE.start_main_~pd2~0#1.base| |ULTIMATE.start_main_~pd1~0#1.base|)) (.cse4 (= 4 |ULTIMATE.start_main_~pd2~0#1.base|)) (.cse5 (= |~#d1~0.offset| 0)) (.cse7 (= |ULTIMATE.start_main_~pd1~0#1.offset| 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 (<= |ULTIMATE.start_main_~pd1~0#1.base| 4) .cse1 .cse5 (<= 5 |~#d2~0.base|) (<= 5 |ULTIMATE.start_main_~pd2~0#1.base|)) (and .cse0 (= |~#d2~0.offset| 0) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~pd1~0#1.offset| |ULTIMATE.start_main_~pd2~0#1.offset|) .cse6 .cse5 .cse7) (and .cse0 (= |~#d1~0.offset| |ULTIMATE.start_main_~pd2~0#1.offset|) .cse6 .cse4 (= |~#d1~0.base| |ULTIMATE.start_main_~pd1~0#1.base|) .cse5 .cse7))) [2022-11-02 20:48:33,260 INFO L899 garLoopResultBuilder]: For program point L35-5(line 35) no Hoare annotation was computed. [2022-11-02 20:48:33,260 INFO L895 garLoopResultBuilder]: At program point L29(lines 27 30) the Hoare annotation is: (and (not (= |~#d1~0.base| |~#d2~0.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~pd2~0#1.base|) |ULTIMATE.start_main_~pd2~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (= |~#d1~0.base| 4) (<= 1 |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_main_~pd1~0#1.offset| |ULTIMATE.start_main_~pd2~0#1.offset|) (= |ULTIMATE.start_main_~pd2~0#1.base| |ULTIMATE.start_main_~pd1~0#1.base|) (= |~#d1~0.offset| 0)) [2022-11-02 20:48:33,261 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2022-11-02 20:48:33,262 INFO L895 garLoopResultBuilder]: At program point L44(lines 33 52) the Hoare annotation is: false [2022-11-02 20:48:33,262 INFO L899 garLoopResultBuilder]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2022-11-02 20:48:33,263 INFO L895 garLoopResultBuilder]: At program point L40-3(lines 40 42) the Hoare annotation is: (let ((.cse25 (+ 7 |ULTIMATE.start_main_~i~0#1|)) (.cse26 (+ 9 |ULTIMATE.start_main_~i~0#1|)) (.cse10 (select (select |#memory_int| |ULTIMATE.start_main_~pd2~0#1.base|) |ULTIMATE.start_main_~pd2~0#1.offset|))) (let ((.cse23 (= .cse10 (+ |ULTIMATE.start_main_~i~0#1| 10))) (.cse11 (= .cse10 .cse26)) (.cse16 (<= .cse26 .cse10)) (.cse21 (<= .cse25 .cse10)) (.cse22 (= .cse10 .cse25)) (.cse1 (= |~#d1~0.offset| |ULTIMATE.start_main_~pd2~0#1.offset|)) (.cse2 (= 4 |ULTIMATE.start_main_~pd1~0#1.base|)) (.cse3 (= 4 |ULTIMATE.start_main_~pd2~0#1.base|)) (.cse17 (= |~#d2~0.offset| 0)) (.cse18 (= 5 |ULTIMATE.start_main_~pd1~0#1.base|)) (.cse19 (= 5 |~#d2~0.base|)) (.cse24 (+ 6 |ULTIMATE.start_main_~i~0#1|)) (.cse15 (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~pd2~0#1.base|)) (.cse20 (= .cse10 (+ |ULTIMATE.start_main_~i~0#1| 8))) (.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse12 (= |~#d1~0.base| 4)) (.cse13 (= |ULTIMATE.start_main_~pd1~0#1.offset| |ULTIMATE.start_main_~pd2~0#1.offset|)) (.cse14 (= |ULTIMATE.start_main_~pd2~0#1.base| |ULTIMATE.start_main_~pd1~0#1.base|)) (.cse4 (= |~#d1~0.base| |ULTIMATE.start_main_~pd1~0#1.base|)) (.cse5 (= |~#d1~0.offset| 0)) (.cse6 (= |ULTIMATE.start_main_~pa~0#1.base| 4)) (.cse8 (= |ULTIMATE.start_main_~pd2~0#1.offset| |ULTIMATE.start_main_~pa~0#1.offset|)) (.cse9 (= |ULTIMATE.start_main_~pd1~0#1.offset| 0))) (or (let ((.cse7 (select (select |#memory_int| 4) 0))) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (<= |ULTIMATE.start_main_~i~0#1| .cse7) (<= .cse7 |ULTIMATE.start_main_~i~0#1|) .cse8 .cse9)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= (+ 5 |ULTIMATE.start_main_~i~0#1|) .cse10) .cse5 .cse6 .cse8 .cse9) (and .cse0 .cse11 .cse12 .cse13 .cse14 .cse5 .cse15 .cse16 .cse6 .cse8 .cse9) (and .cse17 .cse12 .cse18 .cse19 .cse13 .cse14 .cse5 .cse15 .cse20 .cse8 .cse9) (and .cse21 .cse22 .cse17 .cse12 .cse18 .cse19 .cse13 .cse14 .cse5 .cse15 .cse8 .cse9) (and .cse0 .cse12 .cse13 .cse14 (= (+ 3 |ULTIMATE.start_main_~i~0#1|) .cse10) .cse4 .cse5 .cse6 .cse8 .cse9) (and .cse23 .cse17 .cse12 .cse18 .cse19 .cse13 .cse14 .cse5 .cse15 .cse8 .cse9) (and .cse0 (= .cse10 (+ |ULTIMATE.start_main_~i~0#1| 1)) .cse12 .cse13 .cse14 .cse4 .cse5 .cse6 .cse8 .cse9) (and .cse0 .cse23 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse8 .cse9) (and .cse11 .cse17 .cse12 .cse18 .cse19 .cse13 .cse14 .cse5 .cse15 .cse16 .cse8 .cse9) (and .cse0 (= .cse10 (+ 2 |ULTIMATE.start_main_~i~0#1|)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse8 .cse9) (and .cse0 .cse21 .cse22 .cse12 .cse13 .cse14 .cse5 .cse15 .cse6 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= .cse10 .cse24) .cse8 .cse9) (and .cse17 .cse12 .cse18 .cse19 .cse13 .cse14 (<= .cse10 .cse24) .cse5 .cse15 (<= |ULTIMATE.start_main_~i~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|)) .cse8 .cse9) (and .cse0 .cse12 .cse13 .cse14 .cse5 .cse15 .cse6 .cse20 .cse8 .cse9) (and .cse0 .cse12 .cse13 .cse14 .cse4 (= (+ |ULTIMATE.start_main_~i~0#1| 4) .cse10) .cse5 .cse6 .cse8 .cse9)))) [2022-11-02 20:48:33,264 INFO L899 garLoopResultBuilder]: For program point L40-4(lines 40 42) no Hoare annotation was computed. [2022-11-02 20:48:33,265 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-02 20:48:33,265 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-02 20:48:33,265 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-02 20:48:33,265 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 50) no Hoare annotation was computed. [2022-11-02 20:48:33,265 INFO L902 garLoopResultBuilder]: At program point L51(lines 32 52) the Hoare annotation is: true [2022-11-02 20:48:33,266 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 45) no Hoare annotation was computed. [2022-11-02 20:48:33,266 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-11-02 20:48:33,266 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (= |~#d2~0.offset| 0) (= |~#d1~0.base| 4) (= 5 |~#d2~0.base|) (= |~#d1~0.offset| 0)) [2022-11-02 20:48:33,266 INFO L899 garLoopResultBuilder]: For program point L37-2(lines 37 46) no Hoare annotation was computed. [2022-11-02 20:48:33,266 INFO L899 garLoopResultBuilder]: For program point L35-1(line 35) no Hoare annotation was computed. [2022-11-02 20:48:33,270 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1] [2022-11-02 20:48:33,272 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:48:33,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:48:33 BoogieIcfgContainer [2022-11-02 20:48:33,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:48:33,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:48:33,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:48:33,336 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:48:33,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:48:02" (3/4) ... [2022-11-02 20:48:33,340 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-02 20:48:33,347 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure get_dummy [2022-11-02 20:48:33,352 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-02 20:48:33,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-02 20:48:33,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-02 20:48:33,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-02 20:48:33,384 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == i) && d1 == 4) && 1 <= \result) && pd1 == pd2) && pd2 == pd1) && d1 == 0 [2022-11-02 20:48:33,407 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 20:48:33,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:48:33,408 INFO L158 Benchmark]: Toolchain (without parser) took 31521.71ms. Allocated memory was 100.7MB in the beginning and 234.9MB in the end (delta: 134.2MB). Free memory was 62.1MB in the beginning and 111.1MB in the end (delta: -48.9MB). Peak memory consumption was 86.1MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,408 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 100.7MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:48:33,409 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.21ms. Allocated memory is still 100.7MB. Free memory was 61.9MB in the beginning and 76.7MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.41ms. Allocated memory is still 100.7MB. Free memory was 76.7MB in the beginning and 74.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,410 INFO L158 Benchmark]: Boogie Preprocessor took 38.98ms. Allocated memory is still 100.7MB. Free memory was 74.9MB in the beginning and 73.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,410 INFO L158 Benchmark]: RCFGBuilder took 418.76ms. Allocated memory is still 100.7MB. Free memory was 73.8MB in the beginning and 61.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,411 INFO L158 Benchmark]: TraceAbstraction took 30604.35ms. Allocated memory was 100.7MB in the beginning and 234.9MB in the end (delta: 134.2MB). Free memory was 61.2MB in the beginning and 114.2MB in the end (delta: -53.0MB). Peak memory consumption was 126.4MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,412 INFO L158 Benchmark]: Witness Printer took 72.16ms. Allocated memory is still 234.9MB. Free memory was 114.2MB in the beginning and 111.1MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 20:48:33,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 100.7MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.21ms. Allocated memory is still 100.7MB. Free memory was 61.9MB in the beginning and 76.7MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.41ms. Allocated memory is still 100.7MB. Free memory was 76.7MB in the beginning and 74.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.98ms. Allocated memory is still 100.7MB. Free memory was 74.9MB in the beginning and 73.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 418.76ms. Allocated memory is still 100.7MB. Free memory was 73.8MB in the beginning and 61.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 30604.35ms. Allocated memory was 100.7MB in the beginning and 234.9MB in the end (delta: 134.2MB). Free memory was 61.2MB in the beginning and 114.2MB in the end (delta: -53.0MB). Peak memory consumption was 126.4MB. Max. memory is 16.1GB. * Witness Printer took 72.16ms. Allocated memory is still 234.9MB. Free memory was 114.2MB in the beginning and 111.1MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 50]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.5s, OverallIterations: 8, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 13.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 692 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 678 mSDsluCounter, 1691 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1538 mSDsCounter, 479 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4283 IncrementalHoareTripleChecker+Invalid, 4762 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 479 mSolverCounterUnsat, 153 mSDtfsCounter, 4283 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 932 GetRequests, 518 SyntacticMatches, 4 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6166 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, InterpolantAutomatonStates: 222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 125 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 45 NumberOfFragments, 839 HoareAnnotationTreeSize, 14 FomulaSimplifications, 170 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 8517 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 626 NumberOfCodeBlocks, 592 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 903 ConstructedInterpolants, 0 QuantifiedInterpolants, 4600 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 250 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1436/1848 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((!(d1 == d2) && d1 == pd2) && 4 == pd1) && 4 == pd2) && d1 == pd1) && d1 == 0) && pa == 4) && i <= unknown-#memory_int-unknown[4][0]) && unknown-#memory_int-unknown[4][0] <= i) && pd2 == pa) && pd1 == 0) || (((((((((!(d1 == d2) && d1 == pd2) && 4 == pd1) && 4 == pd2) && d1 == pd1) && 5 + i == unknown-#memory_int-unknown[pd2][pd2]) && d1 == 0) && pa == 4) && pd2 == pa) && pd1 == 0)) || ((((((((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == 9 + i) && d1 == 4) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && 9 + i <= unknown-#memory_int-unknown[pd2][pd2]) && pa == 4) && pd2 == pa) && pd1 == 0)) || ((((((((((d2 == 0 && d1 == 4) && 5 == pd1) && 5 == d2) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && unknown-#memory_int-unknown[pd2][pd2] == i + 8) && pd2 == pa) && pd1 == 0)) || (((((((((((7 + i <= unknown-#memory_int-unknown[pd2][pd2] && unknown-#memory_int-unknown[pd2][pd2] == 7 + i) && d2 == 0) && d1 == 4) && 5 == pd1) && 5 == d2) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && d1 == 4) && pd1 == pd2) && pd2 == pd1) && 3 + i == unknown-#memory_int-unknown[pd2][pd2]) && d1 == pd1) && d1 == 0) && pa == 4) && pd2 == pa) && pd1 == 0)) || ((((((((((unknown-#memory_int-unknown[pd2][pd2] == i + 10 && d2 == 0) && d1 == 4) && 5 == pd1) && 5 == d2) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == i + 1) && d1 == 4) && pd1 == pd2) && pd2 == pd1) && d1 == pd1) && d1 == 0) && pa == 4) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == i + 10) && d1 == pd2) && 4 == pd1) && 4 == pd2) && d1 == pd1) && d1 == 0) && pa == 4) && pd2 == pa) && pd1 == 0)) || (((((((((((unknown-#memory_int-unknown[pd2][pd2] == 9 + i && d2 == 0) && d1 == 4) && 5 == pd1) && 5 == d2) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && 9 + i <= unknown-#memory_int-unknown[pd2][pd2]) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == 2 + i) && d1 == pd2) && 4 == pd1) && 4 == pd2) && d1 == pd1) && d1 == 0) && pa == 4) && pd2 == pa) && pd1 == 0)) || ((((((((((!(d1 == d2) && 7 + i <= unknown-#memory_int-unknown[pd2][pd2]) && unknown-#memory_int-unknown[pd2][pd2] == 7 + i) && d1 == 4) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && pa == 4) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && d1 == pd2) && 4 == pd1) && 4 == pd2) && d1 == pd1) && d1 == 0) && pa == 4) && unknown-#memory_int-unknown[pd2][pd2] == 6 + i) && pd2 == pa) && pd1 == 0)) || (((((((((((d2 == 0 && d1 == 4) && 5 == pd1) && 5 == d2) && pd1 == pd2) && pd2 == pd1) && unknown-#memory_int-unknown[pd2][pd2] <= 6 + i) && d1 == 0) && pa == pd2) && i <= unknown-#memory_int-unknown[pa][pa]) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && d1 == 4) && pd1 == pd2) && pd2 == pd1) && d1 == 0) && pa == pd2) && pa == 4) && unknown-#memory_int-unknown[pd2][pd2] == i + 8) && pd2 == pa) && pd1 == 0)) || (((((((((!(d1 == d2) && d1 == 4) && pd1 == pd2) && pd2 == pd1) && d1 == pd1) && i + 4 == unknown-#memory_int-unknown[pd2][pd2]) && d1 == 0) && pa == 4) && pd2 == pa) && pd1 == 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == i) && d1 == 4) && 1 <= \result) && pd1 == pd2) && pd2 == pd1) && d1 == 0 RESULT: Ultimate proved your program to be correct! [2022-11-02 20:48:33,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f24fa4f-d2d7-4ae9-9961-a6cd9556520b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE