./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/recHanoi03-2.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_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/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_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi03-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/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_bec530ff-e898-458f-8e59-63727fbbb12c/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 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 --- 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 19:50:29,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 19:50:29,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 19:50:29,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 19:50:29,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 19:50:29,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 19:50:29,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 19:50:29,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 19:50:29,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 19:50:29,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 19:50:29,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 19:50:29,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 19:50:29,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 19:50:29,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 19:50:29,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 19:50:29,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 19:50:29,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 19:50:29,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 19:50:29,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 19:50:29,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 19:50:29,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 19:50:29,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 19:50:29,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 19:50:29,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 19:50:29,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 19:50:29,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 19:50:29,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 19:50:29,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 19:50:29,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 19:50:29,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 19:50:29,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 19:50:29,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 19:50:29,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 19:50:29,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 19:50:29,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 19:50:29,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 19:50:29,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 19:50:29,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 19:50:29,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 19:50:29,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 19:50:29,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 19:50:29,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 19:50:29,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 19:50:29,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 19:50:29,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 19:50:29,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 19:50:29,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 19:50:29,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 19:50:29,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 19:50:29,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 19:50:29,366 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 19:50:29,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 19:50:29,368 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 19:50:29,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 19:50:29,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 19:50:29,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 19:50:29,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 19:50:29,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 19:50:29,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 19:50:29,369 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 19:50:29,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 19:50:29,370 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 19:50:29,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 19:50:29,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 19:50:29,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 19:50:29,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 19:50:29,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:50:29,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 19:50:29,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 19:50:29,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 19:50:29,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 19:50:29,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 19:50:29,374 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 19:50:29,374 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 19:50:29,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 19:50:29,375 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_bec530ff-e898-458f-8e59-63727fbbb12c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2022-11-02 19:50:29,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 19:50:29,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 19:50:29,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 19:50:29,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 19:50:29,804 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 19:50:29,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/recursive/recHanoi03-2.c [2022-11-02 19:50:29,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/data/fc4fc646a/69043beda3ae449782ec251382522009/FLAG7116904b8 [2022-11-02 19:50:30,460 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 19:50:30,461 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/sv-benchmarks/c/recursive/recHanoi03-2.c [2022-11-02 19:50:30,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/data/fc4fc646a/69043beda3ae449782ec251382522009/FLAG7116904b8 [2022-11-02 19:50:30,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/data/fc4fc646a/69043beda3ae449782ec251382522009 [2022-11-02 19:50:30,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 19:50:30,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 19:50:30,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 19:50:30,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 19:50:30,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 19:50:30,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:50:30" (1/1) ... [2022-11-02 19:50:30,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cfc8891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:30, skipping insertion in model container [2022-11-02 19:50:30,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:50:30" (1/1) ... [2022-11-02 19:50:30,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 19:50:30,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 19:50:31,038 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_bec530ff-e898-458f-8e59-63727fbbb12c/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2022-11-02 19:50:31,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:50:31,054 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 19:50:31,070 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_bec530ff-e898-458f-8e59-63727fbbb12c/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2022-11-02 19:50:31,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:50:31,086 INFO L208 MainTranslator]: Completed translation [2022-11-02 19:50:31,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31 WrapperNode [2022-11-02 19:50:31,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 19:50:31,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 19:50:31,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 19:50:31,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 19:50:31,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,129 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-11-02 19:50:31,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 19:50:31,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 19:50:31,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 19:50:31,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 19:50:31,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 19:50:31,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 19:50:31,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 19:50:31,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 19:50:31,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (1/1) ... [2022-11-02 19:50:31,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:50:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:31,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 19:50:31,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 19:50:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 19:50:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-11-02 19:50:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-11-02 19:50:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 19:50:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 19:50:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 19:50:31,369 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 19:50:31,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 19:50:31,566 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 19:50:31,573 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 19:50:31,573 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 19:50:31,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:31 BoogieIcfgContainer [2022-11-02 19:50:31,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 19:50:31,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 19:50:31,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 19:50:31,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 19:50:31,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:50:30" (1/3) ... [2022-11-02 19:50:31,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d074319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:50:31, skipping insertion in model container [2022-11-02 19:50:31,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:31" (2/3) ... [2022-11-02 19:50:31,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d074319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:50:31, skipping insertion in model container [2022-11-02 19:50:31,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:31" (3/3) ... [2022-11-02 19:50:31,587 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2022-11-02 19:50:31,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 19:50:31,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 19:50:31,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 19:50:31,742 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;@862e8dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 19:50:31,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 19:50:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 19:50:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 19:50:31,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:31,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:31,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-11-02 19:50:31,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:31,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403294353] [2022-11-02 19:50:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:31,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:32,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 19:50:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:50:32,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403294353] [2022-11-02 19:50:32,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403294353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:32,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:32,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 19:50:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549318836] [2022-11-02 19:50:32,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:32,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 19:50:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 19:50:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 19:50:32,508 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 19:50:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:32,692 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-02 19:50:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 19:50:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-02 19:50:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:32,712 INFO L225 Difference]: With dead ends: 29 [2022-11-02 19:50:32,712 INFO L226 Difference]: Without dead ends: 16 [2022-11-02 19:50:32,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 19:50:32,724 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:32,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-02 19:50:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-02 19:50:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-02 19:50:32,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-11-02 19:50:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:32,795 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-02 19:50:32,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 19:50:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-02 19:50:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 19:50:32,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:32,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:32,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 19:50:32,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-11-02 19:50:32,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:32,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081258983] [2022-11-02 19:50:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:32,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:33,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 19:50:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:33,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 19:50:33,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:33,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081258983] [2022-11-02 19:50:33,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081258983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:50:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558729175] [2022-11-02 19:50:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:33,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:33,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:33,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:50:33,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 19:50:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:33,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 19:50:33,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 19:50:33,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 19:50:34,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558729175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:34,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:50:34,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2022-11-02 19:50:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711609681] [2022-11-02 19:50:34,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 19:50:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 19:50:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-02 19:50:34,146 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 19:50:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:34,398 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-02 19:50:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 19:50:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 17 [2022-11-02 19:50:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:34,401 INFO L225 Difference]: With dead ends: 28 [2022-11-02 19:50:34,402 INFO L226 Difference]: Without dead ends: 22 [2022-11-02 19:50:34,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-11-02 19:50:34,405 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-02 19:50:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-02 19:50:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 19:50:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-02 19:50:34,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-11-02 19:50:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:34,427 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-02 19:50:34,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 19:50:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-02 19:50:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 19:50:34,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:34,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:34,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:34,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-11-02 19:50:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583869090] [2022-11-02 19:50:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:34,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 19:50:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 19:50:35,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583869090] [2022-11-02 19:50:35,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583869090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:50:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103553404] [2022-11-02 19:50:35,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 19:50:35,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:35,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:35,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:50:35,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 19:50:35,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 19:50:35,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:50:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 19:50:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:50:35,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 19:50:37,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103553404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:37,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:50:37,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 31 [2022-11-02 19:50:37,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587855074] [2022-11-02 19:50:37,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:37,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 19:50:37,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 19:50:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-02 19:50:37,232 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 21 states have internal predecessors, (41), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 19:50:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:37,649 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-02 19:50:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 19:50:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 21 states have internal predecessors, (41), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) Word has length 29 [2022-11-02 19:50:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:37,652 INFO L225 Difference]: With dead ends: 37 [2022-11-02 19:50:37,652 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 19:50:37,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 19:50:37,654 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:37,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 115 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 19:50:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 19:50:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-02 19:50:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 19:50:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-02 19:50:37,663 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2022-11-02 19:50:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:37,664 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-02 19:50:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 21 states have internal predecessors, (41), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 19:50:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-02 19:50:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 19:50:37,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:37,666 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:37,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:37,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:37,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:37,882 INFO L85 PathProgramCache]: Analyzing trace with hash 278928068, now seen corresponding path program 3 times [2022-11-02 19:50:37,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:37,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295439971] [2022-11-02 19:50:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 19:50:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 19:50:38,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295439971] [2022-11-02 19:50:38,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295439971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:50:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297453394] [2022-11-02 19:50:38,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 19:50:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:38,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:50:38,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 19:50:38,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-02 19:50:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:50:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 19:50:38,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 19:50:39,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 19:50:44,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297453394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:44,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:50:44,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 46 [2022-11-02 19:50:44,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092595427] [2022-11-02 19:50:44,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:44,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 19:50:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 19:50:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 19:50:44,349 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 30 states have internal predecessors, (59), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-02 19:50:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:45,353 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-02 19:50:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 19:50:45,356 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 30 states have internal predecessors, (59), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) Word has length 47 [2022-11-02 19:50:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:45,358 INFO L225 Difference]: With dead ends: 55 [2022-11-02 19:50:45,358 INFO L226 Difference]: Without dead ends: 49 [2022-11-02 19:50:45,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 68 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=646, Invalid=4046, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 19:50:45,362 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:45,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 269 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 19:50:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-02 19:50:45,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-02 19:50:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-02 19:50:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-02 19:50:45,373 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2022-11-02 19:50:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:45,373 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-02 19:50:45,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 30 states have internal predecessors, (59), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-02 19:50:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-02 19:50:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 19:50:45,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:45,377 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:45,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:45,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:45,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2030797316, now seen corresponding path program 4 times [2022-11-02 19:50:45,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:45,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806113597] [2022-11-02 19:50:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:45,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:45,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 19:50:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:46,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:47,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:47,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:47,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:48,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 19:50:48,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806113597] [2022-11-02 19:50:48,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806113597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:50:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029358587] [2022-11-02 19:50:48,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 19:50:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:50:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:48,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:50:48,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 19:50:48,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 19:50:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:50:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 19:50:48,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-02 19:50:50,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:51:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-02 19:51:15,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029358587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:51:15,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 19:51:15,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 42] total 76 [2022-11-02 19:51:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71261765] [2022-11-02 19:51:15,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 19:51:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-02 19:51:15,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:51:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-02 19:51:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=5134, Unknown=0, NotChecked=0, Total=5700 [2022-11-02 19:51:15,019 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 76 states, 76 states have (on average 1.25) internal successors, (95), 48 states have internal predecessors, (95), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) [2022-11-02 19:51:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:51:17,463 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-11-02 19:51:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 19:51:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.25) internal successors, (95), 48 states have internal predecessors, (95), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) Word has length 83 [2022-11-02 19:51:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:51:17,468 INFO L225 Difference]: With dead ends: 91 [2022-11-02 19:51:17,468 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 19:51:17,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 122 SyntacticMatches, 23 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1894, Invalid=13112, Unknown=0, NotChecked=0, Total=15006 [2022-11-02 19:51:17,475 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 19:51:17,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 608 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 19:51:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 19:51:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-02 19:51:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-02 19:51:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-02 19:51:17,489 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2022-11-02 19:51:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:51:17,490 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-02 19:51:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.25) internal successors, (95), 48 states have internal predecessors, (95), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) [2022-11-02 19:51:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-02 19:51:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-02 19:51:17,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:51:17,493 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:51:17,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 19:51:17,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:51:17,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:51:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:51:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash -341184380, now seen corresponding path program 5 times [2022-11-02 19:51:17,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:51:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82271989] [2022-11-02 19:51:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:51:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:51:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:18,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 19:51:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:19,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:22,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:23,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:24,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:25,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:26,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:27,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:28,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:28,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:28,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:28,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:51:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:51:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2022-11-02 19:51:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:51:29,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82271989] [2022-11-02 19:51:29,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82271989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:51:29,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463456091] [2022-11-02 19:51:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 19:51:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:51:29,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:51:29,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 19:51:29,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 19:51:29,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-02 19:51:29,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 19:51:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 19:51:29,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:51:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-11-02 19:51:34,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:51:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463456091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:51:34,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 19:51:34,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [55] total 107 [2022-11-02 19:51:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290650214] [2022-11-02 19:51:34,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:51:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 19:51:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:51:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 19:51:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10549, Unknown=0, NotChecked=0, Total=11342 [2022-11-02 19:51:34,171 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-02 19:51:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:51:34,570 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-11-02 19:51:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 19:51:34,571 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2022-11-02 19:51:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:51:34,578 INFO L225 Difference]: With dead ends: 85 [2022-11-02 19:51:34,579 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 19:51:34,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=793, Invalid=10549, Unknown=0, NotChecked=0, Total=11342 [2022-11-02 19:51:34,585 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:51:34,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 391 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 19:51:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 19:51:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 19:51:34,590 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 19:51:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 19:51:34,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 155 [2022-11-02 19:51:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:51:34,591 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 19:51:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-02 19:51:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 19:51:34,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 19:51:34,595 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 19:51:34,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 19:51:34,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 19:51:34,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-02 19:51:34,828 INFO L899 garLoopResultBuilder]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2022-11-02 19:51:34,829 INFO L902 garLoopResultBuilder]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2022-11-02 19:51:34,829 INFO L899 garLoopResultBuilder]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2022-11-02 19:51:34,829 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2022-11-02 19:51:34,829 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-11-02 19:51:34,829 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2022-11-02 19:51:34,830 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-02 19:51:34,830 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 36) no Hoare annotation was computed. [2022-11-02 19:51:34,830 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-02 19:51:34,830 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (not (< 31 |ULTIMATE.start_main_~n~0#1|)) [2022-11-02 19:51:34,830 INFO L899 garLoopResultBuilder]: For program point L31-1(line 31) no Hoare annotation was computed. [2022-11-02 19:51:34,830 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-02 19:51:34,831 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-02 19:51:34,831 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2022-11-02 19:51:34,831 INFO L902 garLoopResultBuilder]: At program point L26(lines 26 37) the Hoare annotation is: true [2022-11-02 19:51:34,831 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2022-11-02 19:51:34,832 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-11-02 19:51:34,835 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1] [2022-11-02 19:51:34,838 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 19:51:34,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 07:51:34 BoogieIcfgContainer [2022-11-02 19:51:34,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 19:51:34,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 19:51:34,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 19:51:34,849 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 19:51:34,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:31" (3/4) ... [2022-11-02 19:51:34,852 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-02 19:51:34,858 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2022-11-02 19:51:34,862 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-02 19:51:34,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-02 19:51:34,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-02 19:51:34,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-02 19:51:34,898 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 19:51:34,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 19:51:34,899 INFO L158 Benchmark]: Toolchain (without parser) took 64105.78ms. Allocated memory was 113.2MB in the beginning and 518.0MB in the end (delta: 404.8MB). Free memory was 78.9MB in the beginning and 289.4MB in the end (delta: -210.5MB). Peak memory consumption was 193.7MB. Max. memory is 16.1GB. [2022-11-02 19:51:34,899 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 62.6MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 19:51:34,900 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.98ms. Allocated memory is still 113.2MB. Free memory was 78.7MB in the beginning and 89.0MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 19:51:34,900 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.63ms. Allocated memory is still 113.2MB. Free memory was 89.0MB in the beginning and 87.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 19:51:34,900 INFO L158 Benchmark]: Boogie Preprocessor took 39.18ms. Allocated memory is still 113.2MB. Free memory was 87.7MB in the beginning and 86.8MB in the end (delta: 867.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 19:51:34,901 INFO L158 Benchmark]: RCFGBuilder took 405.13ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 77.3MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 19:51:34,901 INFO L158 Benchmark]: TraceAbstraction took 63269.69ms. Allocated memory was 113.2MB in the beginning and 518.0MB in the end (delta: 404.8MB). Free memory was 76.9MB in the beginning and 291.5MB in the end (delta: -214.6MB). Peak memory consumption was 192.5MB. Max. memory is 16.1GB. [2022-11-02 19:51:34,902 INFO L158 Benchmark]: Witness Printer took 49.57ms. Allocated memory is still 518.0MB. Free memory was 291.5MB in the beginning and 289.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 19:51:34,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 62.6MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.98ms. Allocated memory is still 113.2MB. Free memory was 78.7MB in the beginning and 89.0MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.63ms. Allocated memory is still 113.2MB. Free memory was 89.0MB in the beginning and 87.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.18ms. Allocated memory is still 113.2MB. Free memory was 87.7MB in the beginning and 86.8MB in the end (delta: 867.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 405.13ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 77.3MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 63269.69ms. Allocated memory was 113.2MB in the beginning and 518.0MB in the end (delta: 404.8MB). Free memory was 76.9MB in the beginning and 291.5MB in the end (delta: -214.6MB). Peak memory consumption was 192.5MB. Max. memory is 16.1GB. * Witness Printer took 49.57ms. Allocated memory is still 518.0MB. Free memory was 291.5MB in the beginning and 289.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 35]: 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 63.1s, OverallIterations: 6, TraceHistogramMax: 25, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 240 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 188 mSDsluCounter, 1496 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1364 mSDsCounter, 282 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2225 IncrementalHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 282 mSolverCounterUnsat, 132 mSDtfsCounter, 2225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 811 GetRequests, 409 SyntacticMatches, 40 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6532 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=5, InterpolantAutomatonStates: 174, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 55.6s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 3515 SizeOfPredicates, 36 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 3280/5280 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: 26]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-02 19:51:34,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec530ff-e898-458f-8e59-63727fbbb12c/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