./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ --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 a6bf1264929a0645d918c583a519b6be036274699656a22f3fed375c55deb5c8 --- 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-dbf71c6-m [2022-10-17 11:02:09,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:02:09,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:02:09,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:02:09,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:02:09,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:02:09,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:02:09,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:02:09,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:02:09,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:02:09,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:02:09,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:02:09,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:02:09,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:02:09,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:02:09,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:02:09,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:02:09,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:02:09,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:02:09,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:02:09,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:02:09,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:02:09,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:02:09,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:02:09,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:02:09,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:02:09,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:02:09,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:02:09,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:02:09,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:02:09,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:02:09,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:02:09,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:02:09,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:02:09,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:02:09,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:02:09,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:02:09,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:02:09,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:02:09,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:02:09,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:02:09,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:02:09,233 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:02:09,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:02:09,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:02:09,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:02:09,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:02:09,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:02:09,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:02:09,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:02:09,241 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:02:09,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:02:09,242 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:02:09,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:02:09,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:02:09,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:02:09,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:02:09,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:02:09,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:02:09,254 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:02:09,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:02:09,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:02:09,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:02:09,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:02:09,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:02:09,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:02:09,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:02:09,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:02:09,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:02:09,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:02:09,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:02:09,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:02:09,259 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:02:09,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:02:09,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:02:09,259 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_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6bf1264929a0645d918c583a519b6be036274699656a22f3fed375c55deb5c8 [2022-10-17 11:02:09,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:02:09,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:02:09,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:02:09,582 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:02:09,582 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:02:09,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem12_label27.c [2022-10-17 11:02:09,676 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/data/5d8558fc6/5123db9d44074c28a39b8f711b825d69/FLAG1356b19aa [2022-10-17 11:02:10,510 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:02:10,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/sv-benchmarks/c/eca-rers2012/Problem12_label27.c [2022-10-17 11:02:10,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/data/5d8558fc6/5123db9d44074c28a39b8f711b825d69/FLAG1356b19aa [2022-10-17 11:02:11,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/data/5d8558fc6/5123db9d44074c28a39b8f711b825d69 [2022-10-17 11:02:11,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:02:11,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:02:11,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:02:11,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:02:11,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:02:11,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:02:11" (1/1) ... [2022-10-17 11:02:11,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca75265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:11, skipping insertion in model container [2022-10-17 11:02:11,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:02:11" (1/1) ... [2022-10-17 11:02:11,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:02:11,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:02:11,598 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_341153f7-0990-4fff-8e98-9ed8ea8a2be6/sv-benchmarks/c/eca-rers2012/Problem12_label27.c[4120,4133] [2022-10-17 11:02:12,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:02:12,819 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:02:12,857 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_341153f7-0990-4fff-8e98-9ed8ea8a2be6/sv-benchmarks/c/eca-rers2012/Problem12_label27.c[4120,4133] [2022-10-17 11:02:13,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:02:13,506 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:02:13,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13 WrapperNode [2022-10-17 11:02:13,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:02:13,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:02:13,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:02:13,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:02:13,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:13,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,014 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-10-17 11:02:14,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:02:14,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:02:14,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:02:14,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:02:14,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:02:14,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:02:14,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:02:14,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:02:14,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (1/1) ... [2022-10-17 11:02:14,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:02:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:14,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:02:14,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:02:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:02:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:02:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:02:14,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:02:14,844 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:02:14,846 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:02:20,077 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:02:20,108 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:02:20,108 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:02:20,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:02:20 BoogieIcfgContainer [2022-10-17 11:02:20,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:02:20,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:02:20,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:02:20,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:02:20,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:02:11" (1/3) ... [2022-10-17 11:02:20,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbc6eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:02:20, skipping insertion in model container [2022-10-17 11:02:20,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:02:13" (2/3) ... [2022-10-17 11:02:20,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbc6eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:02:20, skipping insertion in model container [2022-10-17 11:02:20,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:02:20" (3/3) ... [2022-10-17 11:02:20,126 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label27.c [2022-10-17 11:02:20,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:02:20,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:02:20,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:02:20,272 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;@11650ff2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:02:20,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:02:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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) [2022-10-17 11:02:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-17 11:02:20,294 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:20,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:20,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:02:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2022-10-17 11:02:20,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:20,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283635252] [2022-10-17 11:02:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:20,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:20,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283635252] [2022-10-17 11:02:20,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283635252] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:20,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:20,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:02:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568648529] [2022-10-17 11:02:20,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:02:20,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:02:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:02:20,757 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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) [2022-10-17 11:02:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:25,474 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-10-17 11:02:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:02:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 31 [2022-10-17 11:02:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:25,512 INFO L225 Difference]: With dead ends: 2388 [2022-10-17 11:02:25,512 INFO L226 Difference]: Without dead ends: 1506 [2022-10-17 11:02:25,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:02:25,525 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 866 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:25,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-10-17 11:02:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-10-17 11:02:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-10-17 11:02:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 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) [2022-10-17 11:02:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2022-10-17 11:02:25,665 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 31 [2022-10-17 11:02:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:25,666 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2022-10-17 11:02:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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) [2022-10-17 11:02:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2022-10-17 11:02:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 11:02:25,671 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:25,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:25,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:02:25,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:02:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1399644642, now seen corresponding path program 1 times [2022-10-17 11:02:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090783865] [2022-10-17 11:02:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:25,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090783865] [2022-10-17 11:02:25,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090783865] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:25,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:25,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:02:25,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700708104] [2022-10-17 11:02:25,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:02:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:02:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:02:25,912 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2022-10-17 11:02:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:30,417 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2022-10-17 11:02:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:02:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 100 [2022-10-17 11:02:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:30,436 INFO L225 Difference]: With dead ends: 3761 [2022-10-17 11:02:30,436 INFO L226 Difference]: Without dead ends: 2257 [2022-10-17 11:02:30,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:02:30,454 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:30,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-10-17 11:02:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-10-17 11:02:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2022-10-17 11:02:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 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) [2022-10-17 11:02:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2022-10-17 11:02:30,533 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 100 [2022-10-17 11:02:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:30,536 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2022-10-17 11:02:30,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2022-10-17 11:02:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2022-10-17 11:02:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-10-17 11:02:30,545 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:30,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:02:30,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:02:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1168094211, now seen corresponding path program 1 times [2022-10-17 11:02:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091598051] [2022-10-17 11:02:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:31,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091598051] [2022-10-17 11:02:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091598051] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397918914] [2022-10-17 11:02:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:31,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:31,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:31,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:02:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:02:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:31,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:02:31,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397918914] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:31,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:02:31,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-10-17 11:02:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529109745] [2022-10-17 11:02:31,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:31,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:02:31,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:02:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:02:31,360 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-10-17 11:02:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:02:36,386 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2022-10-17 11:02:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:02:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 102 [2022-10-17 11:02:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:02:36,417 INFO L225 Difference]: With dead ends: 6765 [2022-10-17 11:02:36,418 INFO L226 Difference]: Without dead ends: 4510 [2022-10-17 11:02:36,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:02:36,424 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 739 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-10-17 11:02:36,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 618 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-10-17 11:02:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-10-17 11:02:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-10-17 11:02:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.2929696163229096) internal successors, (5830), 4509 states have internal predecessors, (5830), 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) [2022-10-17 11:02:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5830 transitions. [2022-10-17 11:02:36,626 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5830 transitions. Word has length 102 [2022-10-17 11:02:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:02:36,627 INFO L495 AbstractCegarLoop]: Abstraction has 4510 states and 5830 transitions. [2022-10-17 11:02:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-10-17 11:02:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5830 transitions. [2022-10-17 11:02:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-10-17 11:02:36,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:02:36,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:36,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:36,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341153f7-0990-4fff-8e98-9ed8ea8a2be6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:36,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:02:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash -958136910, now seen corresponding path program 1 times [2022-10-17 11:02:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290998039] [2022-10-17 11:02:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:37,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:37,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290998039] [2022-10-17 11:02:37,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290998039] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:37,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:37,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:02:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955873959] [2022-10-17 11:02:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:02:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:02:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:02:37,223 INFO L87 Difference]: Start difference. First operand 4510 states and 5830 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 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)