./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/count_up_down-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/count_up_down-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8 --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 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 --- 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-e04fb08 [2022-11-16 11:41:40,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:41:40,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:41:40,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:41:40,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:41:40,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:41:40,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:41:40,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:41:40,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:41:40,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:41:40,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:41:40,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:41:40,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:41:40,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:41:40,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:41:40,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:41:40,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:41:40,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:41:40,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:41:40,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:41:40,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:41:40,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:41:40,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:41:40,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:41:40,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:41:40,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:41:40,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:41:40,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:41:40,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:41:40,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:41:40,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:41:40,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:41:40,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:41:40,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:41:40,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:41:40,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:41:40,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:41:40,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:41:40,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:41:40,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:41:40,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:41:40,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:41:40,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:41:40,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:41:40,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:41:40,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:41:40,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:41:40,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:41:40,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:41:40,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:41:40,245 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:41:40,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:41:40,245 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:41:40,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:41:40,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:41:40,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:41:40,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:41:40,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:41:40,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:41:40,247 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:41:40,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:41:40,247 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:41:40,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:41:40,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:41:40,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:41:40,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:41:40,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:41:40,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:41:40,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:41:40,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:41:40,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:41:40,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:41:40,262 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:41:40,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:41:40,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:41:40,262 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_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 [2022-11-16 11:41:40,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:41:40,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:41:40,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:41:40,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:41:40,592 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:41:40,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/loops/count_up_down-1.c [2022-11-16 11:41:40,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/data/988a2f951/55a23b10af864a02baefc24e30ac2b8b/FLAG2f3e934b5 [2022-11-16 11:41:41,089 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:41:41,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/sv-benchmarks/c/loops/count_up_down-1.c [2022-11-16 11:41:41,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/data/988a2f951/55a23b10af864a02baefc24e30ac2b8b/FLAG2f3e934b5 [2022-11-16 11:41:41,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/data/988a2f951/55a23b10af864a02baefc24e30ac2b8b [2022-11-16 11:41:41,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:41:41,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:41:41,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:41:41,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:41:41,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:41:41,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13fff4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41, skipping insertion in model container [2022-11-16 11:41:41,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:41:41,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:41:41,753 WARN L229 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_42a5c18d-451a-47aa-89e5-94d25650fe37/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2022-11-16 11:41:41,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:41:41,777 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:41:41,793 WARN L229 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_42a5c18d-451a-47aa-89e5-94d25650fe37/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2022-11-16 11:41:41,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:41:41,812 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:41:41,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41 WrapperNode [2022-11-16 11:41:41,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:41:41,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:41:41,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:41:41,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:41:41,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,852 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2022-11-16 11:41:41,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:41:41,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:41:41,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:41:41,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:41:41,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,880 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:41:41,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:41:41,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:41:41,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:41:41,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (1/1) ... [2022-11-16 11:41:41,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:41:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:41,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:41:41,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:41:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:41:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:41:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:41:41,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:41:42,020 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:41:42,022 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:41:42,132 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:41:42,137 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:41:42,137 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:41:42,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:41:42 BoogieIcfgContainer [2022-11-16 11:41:42,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:41:42,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:41:42,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:41:42,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:41:42,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:41:41" (1/3) ... [2022-11-16 11:41:42,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554914a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:41:42, skipping insertion in model container [2022-11-16 11:41:42,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:41" (2/3) ... [2022-11-16 11:41:42,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554914a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:41:42, skipping insertion in model container [2022-11-16 11:41:42,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:41:42" (3/3) ... [2022-11-16 11:41:42,149 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2022-11-16 11:41:42,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:41:42,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:41:42,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:41:42,222 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;@79e301f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:41:42,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:41:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-11-16 11:41:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:41:42,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:42,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:41:42,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-11-16 11:41:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106471786] [2022-11-16 11:41:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:42,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:42,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106471786] [2022-11-16 11:41:42,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106471786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:42,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:42,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:42,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740989609] [2022-11-16 11:41:42,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:42,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:43,016 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-16 11:41:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:43,123 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-16 11:41:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:41:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:43,133 INFO L225 Difference]: With dead ends: 26 [2022-11-16 11:41:43,133 INFO L226 Difference]: Without dead ends: 8 [2022-11-16 11:41:43,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:41:43,140 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:43,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:41:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-16 11:41:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-16 11:41:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2022-11-16 11:41:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-16 11:41:43,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-11-16 11:41:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:43,172 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-16 11:41:43,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-16 11:41:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-16 11:41:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:41:43,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:43,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:43,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:41:43,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-11-16 11:41:43,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:43,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485049986] [2022-11-16 11:41:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:43,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:43,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485049986] [2022-11-16 11:41:43,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485049986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:43,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298481530] [2022-11-16 11:41:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:43,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:43,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:41:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:41:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:43,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:44,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298481530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:44,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:41:44,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-16 11:41:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100422561] [2022-11-16 11:41:44,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:41:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:41:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:41:44,069 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:44,390 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-11-16 11:41:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:41:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:41:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:44,394 INFO L225 Difference]: With dead ends: 17 [2022-11-16 11:41:44,394 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 11:41:44,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:41:44,398 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:44,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:41:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 11:41:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-16 11:41:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-11-16 11:41:44,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2022-11-16 11:41:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:44,409 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-11-16 11:41:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-11-16 11:41:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:41:44,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:44,410 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:44,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:44,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2022-11-16 11:41:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:44,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527663298] [2022-11-16 11:41:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:45,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527663298] [2022-11-16 11:41:45,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527663298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685439015] [2022-11-16 11:41:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:45,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:45,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:45,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:41:45,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:41:45,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:41:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:45,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:46,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685439015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:46,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:41:46,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-16 11:41:46,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389818683] [2022-11-16 11:41:46,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:46,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:41:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:46,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:41:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:41:46,081 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:49,241 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-16 11:41:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:41:49,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:41:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:49,243 INFO L225 Difference]: With dead ends: 25 [2022-11-16 11:41:49,243 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 11:41:49,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:41:49,245 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:49,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 33 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:41:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 11:41:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 11:41:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2022-11-16 11:41:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-11-16 11:41:49,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2022-11-16 11:41:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:49,257 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-11-16 11:41:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-11-16 11:41:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:41:49,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:49,258 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:49,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:41:49,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:49,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2022-11-16 11:41:49,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660025183] [2022-11-16 11:41:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:50,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660025183] [2022-11-16 11:41:50,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660025183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187212983] [2022-11-16 11:41:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:41:50,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:50,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:50,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a5c18d-451a-47aa-89e5-94d25650fe37/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:41:51,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:41:51,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:51,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 11:41:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:52,890 WARN L233 SmtUtils]: Spent 13.92s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)