./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label23.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_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/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_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/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_4bc7f516-7690-4761-8745-60a2162e8c61/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 0ce888a9129ad33560fa4014264bdc8a732894a2cafd0839341c70c58fdd8f98 --- 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 11:03:11,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:03:11,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:03:11,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:03:11,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:03:11,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:03:11,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:03:11,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:03:11,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:03:11,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:03:11,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:03:11,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:03:11,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:03:11,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:03:11,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:03:11,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:03:11,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:03:11,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:03:11,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:03:11,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:03:11,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:03:11,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:03:11,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:03:11,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:03:11,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:03:11,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:03:11,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:03:11,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:03:11,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:03:11,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:03:11,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:03:11,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:03:11,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:03:11,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:03:11,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:03:11,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:03:11,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:03:11,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:03:11,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:03:11,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:03:11,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:03:11,761 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:03:11,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:03:11,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:03:11,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:03:11,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:03:11,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:03:11,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:03:11,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:03:11,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:03:11,825 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:03:11,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:03:11,828 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:03:11,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:03:11,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:03:11,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:03:11,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:03:11,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:03:11,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:03:11,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:03:11,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:03:11,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:03:11,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:03:11,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:03:11,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:03:11,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:03:11,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:03:11,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:03:11,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:03:11,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:03:11,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:03:11,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:03:11,836 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:03:11,837 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:03:11,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:03:11,837 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_4bc7f516-7690-4761-8745-60a2162e8c61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ce888a9129ad33560fa4014264bdc8a732894a2cafd0839341c70c58fdd8f98 [2022-10-17 11:03:12,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:03:12,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:03:12,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:03:12,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:03:12,216 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:03:12,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem12_label23.c [2022-10-17 11:03:12,294 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/data/68d065c15/420f8ad418ea4ba88c31c57a5e0fab89/FLAG5c4e9847f [2022-10-17 11:03:13,148 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:03:13,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/sv-benchmarks/c/eca-rers2012/Problem12_label23.c [2022-10-17 11:03:13,185 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/data/68d065c15/420f8ad418ea4ba88c31c57a5e0fab89/FLAG5c4e9847f [2022-10-17 11:03:13,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/data/68d065c15/420f8ad418ea4ba88c31c57a5e0fab89 [2022-10-17 11:03:13,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:03:13,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:03:13,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:03:13,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:03:13,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:03:13,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:03:13" (1/1) ... [2022-10-17 11:03:13,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb46aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:13, skipping insertion in model container [2022-10-17 11:03:13,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:03:13" (1/1) ... [2022-10-17 11:03:13,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:03:13,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:03:14,089 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_4bc7f516-7690-4761-8745-60a2162e8c61/sv-benchmarks/c/eca-rers2012/Problem12_label23.c[4581,4594] [2022-10-17 11:03:15,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:03:15,281 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:03:15,325 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_4bc7f516-7690-4761-8745-60a2162e8c61/sv-benchmarks/c/eca-rers2012/Problem12_label23.c[4581,4594] [2022-10-17 11:03:16,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:03:16,155 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:03:16,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16 WrapperNode [2022-10-17 11:03:16,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:03:16,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:03:16,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:03:16,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:03:16,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:16,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:16,743 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-10-17 11:03:16,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:03:16,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:03:16,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:03:16,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:03:16,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:16,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:16,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:16,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:17,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:17,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:17,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:17,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:17,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:03:17,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:03:17,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:03:17,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:03:17,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (1/1) ... [2022-10-17 11:03:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:03:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:17,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:03:17,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc7f516-7690-4761-8745-60a2162e8c61/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:03:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:03:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:03:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:03:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:03:17,426 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:03:17,429 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:03:23,318 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:03:23,345 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:03:23,346 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:03:23,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:03:23 BoogieIcfgContainer [2022-10-17 11:03:23,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:03:23,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:03:23,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:03:23,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:03:23,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:03:13" (1/3) ... [2022-10-17 11:03:23,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb74d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:03:23, skipping insertion in model container [2022-10-17 11:03:23,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:16" (2/3) ... [2022-10-17 11:03:23,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb74d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:03:23, skipping insertion in model container [2022-10-17 11:03:23,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:03:23" (3/3) ... [2022-10-17 11:03:23,363 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label23.c [2022-10-17 11:03:23,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:03:23,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:03:23,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:03:23,510 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;@33e6c53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:03:23,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:03:23,526 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 11:03:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 11:03:23,538 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:23,538 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, 1, 1, 1, 1] [2022-10-17 11:03:23,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -596708735, now seen corresponding path program 1 times [2022-10-17 11:03:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:23,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098440997] [2022-10-17 11:03:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:23,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:24,077 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 11:03:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098440997] [2022-10-17 11:03:24,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098440997] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:24,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:03:24,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956433368] [2022-10-17 11:03:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:24,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:03:24,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:03:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:03:24,149 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 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 11:03:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:29,492 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-10-17 11:03:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:03:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 35 [2022-10-17 11:03:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:29,521 INFO L225 Difference]: With dead ends: 2388 [2022-10-17 11:03:29,522 INFO L226 Difference]: Without dead ends: 1506 [2022-10-17 11:03:29,530 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 11:03:29,534 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 801 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:29,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-10-17 11:03:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-10-17 11:03:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-10-17 11:03:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 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 11:03:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2022-10-17 11:03:29,661 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 35 [2022-10-17 11:03:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:29,662 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2022-10-17 11:03:29,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 11:03:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2022-10-17 11:03:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 11:03:29,666 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:29,667 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, 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] [2022-10-17 11:03:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:03:29,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash -830145180, now seen corresponding path program 1 times [2022-10-17 11:03:29,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:29,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603886707] [2022-10-17 11:03:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:29,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:03:30,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:30,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603886707] [2022-10-17 11:03:30,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603886707] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:30,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:30,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:03:30,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031990258] [2022-10-17 11:03:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:30,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:03:30,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:03:30,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:03:30,101 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 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 11:03:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:37,023 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2022-10-17 11:03:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:03:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 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 11:03:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:37,050 INFO L225 Difference]: With dead ends: 5271 [2022-10-17 11:03:37,050 INFO L226 Difference]: Without dead ends: 3767 [2022-10-17 11:03:37,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:37,062 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 2307 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:37,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2307 Valid, 197 Invalid, 5146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1534 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-10-17 11:03:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2022-10-17 11:03:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2022-10-17 11:03:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6056412985630655) internal successors, (6034), 3758 states have internal predecessors, (6034), 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 11:03:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6034 transitions. [2022-10-17 11:03:37,200 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6034 transitions. Word has length 100 [2022-10-17 11:03:37,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:37,205 INFO L495 AbstractCegarLoop]: Abstraction has 3759 states and 6034 transitions. [2022-10-17 11:03:37,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 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 11:03:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6034 transitions. [2022-10-17 11:03:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-10-17 11:03:37,214 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:37,215 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, 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] [2022-10-17 11:03:37,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:03:37,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1113859181, now seen corresponding path program 1 times [2022-10-17 11:03:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123929467] [2022-10-17 11:03:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:03:37,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123929467] [2022-10-17 11:03:37,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123929467] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:37,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:37,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:03:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102273228] [2022-10-17 11:03:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:03:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:03:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:03:37,437 INFO L87 Difference]: Start difference. First operand 3759 states and 6034 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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)