./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8 --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 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b --- 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-2329fc7 [2022-12-13 21:46:25,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:46:25,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:46:25,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:46:25,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:46:25,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:46:25,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:46:25,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:46:25,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:46:25,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:46:25,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:46:25,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:46:25,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:46:25,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:46:25,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:46:25,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:46:25,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:46:25,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:46:25,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:46:25,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:46:25,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:46:25,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:46:25,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:46:25,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:46:25,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:46:25,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:46:25,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:46:25,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:46:25,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:46:25,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:46:25,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:46:25,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:46:25,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:46:25,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:46:25,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:46:25,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:46:25,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:46:25,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:46:25,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:46:25,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:46:25,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:46:25,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:46:25,700 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:46:25,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:46:25,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:46:25,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:46:25,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:46:25,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:46:25,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:46:25,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:46:25,701 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:46:25,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:46:25,702 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:46:25,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:46:25,703 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:46:25,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:46:25,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:46:25,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:46:25,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:46:25,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:46:25,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:46:25,704 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b [2022-12-13 21:46:25,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:46:25,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:46:25,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:46:25,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:46:25,919 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:46:25,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2022-12-13 21:46:28,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:46:28,571 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:46:28,572 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2022-12-13 21:46:28,576 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/data/5b205f25b/a0234d64debe413ba57175898fcc0f5f/FLAG97bbe869d [2022-12-13 21:46:28,972 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/data/5b205f25b/a0234d64debe413ba57175898fcc0f5f [2022-12-13 21:46:28,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:46:28,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:46:28,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:46:28,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:46:28,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:46:28,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:46:28" (1/1) ... [2022-12-13 21:46:28,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13866b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:28, skipping insertion in model container [2022-12-13 21:46:28,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:46:28" (1/1) ... [2022-12-13 21:46:28,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:46:28,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:46:29,094 WARN L237 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_efc278a0-861d-4a67-886b-70f97c7531f5/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-12-13 21:46:29,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:46:29,112 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:46:29,121 WARN L237 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_efc278a0-861d-4a67-886b-70f97c7531f5/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-12-13 21:46:29,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:46:29,135 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:46:29,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29 WrapperNode [2022-12-13 21:46:29,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:46:29,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:46:29,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:46:29,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:46:29,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,159 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-12-13 21:46:29,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:46:29,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:46:29,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:46:29,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:46:29,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,172 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:46:29,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:46:29,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:46:29,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:46:29,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (1/1) ... [2022-12-13 21:46:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:46:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:29,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:46:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:46:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:46:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:46:29,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:46:29,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:46:29,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 21:46:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 21:46:29,286 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:46:29,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:46:29,402 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:46:29,406 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:46:29,407 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 21:46:29,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:46:29 BoogieIcfgContainer [2022-12-13 21:46:29,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:46:29,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:46:29,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:46:29,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:46:29,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:46:28" (1/3) ... [2022-12-13 21:46:29,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e2ef5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:46:29, skipping insertion in model container [2022-12-13 21:46:29,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:46:29" (2/3) ... [2022-12-13 21:46:29,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e2ef5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:46:29, skipping insertion in model container [2022-12-13 21:46:29,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:46:29" (3/3) ... [2022-12-13 21:46:29,415 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.c [2022-12-13 21:46:29,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:46:29,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:46:29,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:46:29,470 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;@a092490, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:46:29,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:46:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 21:46:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 21:46:29,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:29,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:29,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-12-13 21:46:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351391857] [2022-12-13 21:46:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:29,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:29,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351391857] [2022-12-13 21:46:29,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 21:46:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863927604] [2022-12-13 21:46:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:29,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:29,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:29,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:29,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:46:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 21:46:29,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:46:29,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:46:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863927604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:46:29,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:46:29,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:46:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99150326] [2022-12-13 21:46:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:46:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:46:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:46:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:46:29,687 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:29,704 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-12-13 21:46:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:46:29,705 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 21:46:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:29,711 INFO L225 Difference]: With dead ends: 50 [2022-12-13 21:46:29,711 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 21:46:29,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:46:29,715 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:29,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 21:46:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-13 21:46:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 21:46:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-12-13 21:46:29,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-12-13 21:46:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:29,743 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-12-13 21:46:29,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-12-13 21:46:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 21:46:29,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:29,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:29,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:46:29,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:29,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-12-13 21:46:29,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:29,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845960214] [2022-12-13 21:46:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:29,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:46:30,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845960214] [2022-12-13 21:46:30,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845960214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:46:30,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:46:30,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:46:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761932660] [2022-12-13 21:46:30,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:46:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:46:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:46:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:46:30,161 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:30,201 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-12-13 21:46:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:46:30,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 21:46:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:30,203 INFO L225 Difference]: With dead ends: 36 [2022-12-13 21:46:30,203 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 21:46:30,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:46:30,204 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:30,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 21:46:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-12-13 21:46:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 21:46:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-12-13 21:46:30,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-12-13 21:46:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:30,212 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-12-13 21:46:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-12-13 21:46:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 21:46:30,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:30,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:30,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:46:30,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:30,214 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-12-13 21:46:30,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:30,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722216041] [2022-12-13 21:46:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722216041] [2022-12-13 21:46:30,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 21:46:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576750748] [2022-12-13 21:46:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:30,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:30,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:46:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:46:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:46:30,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:46:30,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576750748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:46:30,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:46:30,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:46:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277447252] [2022-12-13 21:46:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:46:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:46:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:46:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:46:30,301 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:30,319 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-12-13 21:46:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:46:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 21:46:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:30,320 INFO L225 Difference]: With dead ends: 42 [2022-12-13 21:46:30,320 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 21:46:30,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:46:30,322 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:30,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 21:46:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 21:46:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 21:46:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-12-13 21:46:30,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-12-13 21:46:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:30,330 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-12-13 21:46:30,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-12-13 21:46:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 21:46:30,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:30,331 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:30,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:46:30,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:30,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-12-13 21:46:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418561945] [2022-12-13 21:46:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 21:46:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:46:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418561945] [2022-12-13 21:46:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418561945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:46:30,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:46:30,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:46:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252155901] [2022-12-13 21:46:30,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:46:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:46:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:46:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:46:30,730 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 21:46:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:30,771 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-12-13 21:46:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:46:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-13 21:46:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:30,772 INFO L225 Difference]: With dead ends: 42 [2022-12-13 21:46:30,772 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 21:46:30,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:46:30,773 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:30,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 21:46:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-12-13 21:46:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 21:46:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-12-13 21:46:30,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-12-13 21:46:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:30,778 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-12-13 21:46:30,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 21:46:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-12-13 21:46:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 21:46:30,779 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:30,779 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:30,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:46:30,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-12-13 21:46:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:30,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303637239] [2022-12-13 21:46:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:30,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493178226] [2022-12-13 21:46:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:30,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:30,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:46:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 21:46:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:46:30,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:46:31,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:31,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303637239] [2022-12-13 21:46:31,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:31,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493178226] [2022-12-13 21:46:31,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493178226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:31,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:31,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-12-13 21:46:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944632217] [2022-12-13 21:46:31,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:31,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:46:31,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:46:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 21:46:31,055 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 21:46:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:32,008 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-12-13 21:46:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:46:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2022-12-13 21:46:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:32,010 INFO L225 Difference]: With dead ends: 71 [2022-12-13 21:46:32,011 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 21:46:32,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:46:32,012 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:32,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 79 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 21:46:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 21:46:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-12-13 21:46:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 21:46:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-12-13 21:46:32,021 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2022-12-13 21:46:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:32,021 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-12-13 21:46:32,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 21:46:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-12-13 21:46:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 21:46:32,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:32,022 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:32,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:46:32,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:32,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:32,225 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-12-13 21:46:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:32,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357704609] [2022-12-13 21:46:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:32,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:32,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153141847] [2022-12-13 21:46:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:32,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:32,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:32,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:46:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 21:46:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 21:46:32,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 21:46:32,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357704609] [2022-12-13 21:46:32,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153141847] [2022-12-13 21:46:32,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153141847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:32,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:32,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-13 21:46:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753440346] [2022-12-13 21:46:32,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:32,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:46:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:46:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:46:32,491 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 21:46:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:32,613 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-12-13 21:46:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:46:32,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2022-12-13 21:46:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:32,614 INFO L225 Difference]: With dead ends: 73 [2022-12-13 21:46:32,614 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 21:46:32,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:46:32,615 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:32,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:46:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 21:46:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-12-13 21:46:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-13 21:46:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-12-13 21:46:32,634 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2022-12-13 21:46:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:32,634 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-12-13 21:46:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 21:46:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-12-13 21:46:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 21:46:32,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:32,636 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:32,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:46:32,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 21:46:32,837 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2022-12-13 21:46:32,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:32,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050035981] [2022-12-13 21:46:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:32,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:32,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534409414] [2022-12-13 21:46:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:32,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:32,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:32,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:32,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:46:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:32,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 21:46:32,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 21:46:33,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 21:46:33,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050035981] [2022-12-13 21:46:33,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534409414] [2022-12-13 21:46:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534409414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:33,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-13 21:46:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710705711] [2022-12-13 21:46:33,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:46:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:46:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:46:33,109 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 21:46:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:33,169 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-12-13 21:46:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 21:46:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2022-12-13 21:46:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:33,171 INFO L225 Difference]: With dead ends: 165 [2022-12-13 21:46:33,171 INFO L226 Difference]: Without dead ends: 127 [2022-12-13 21:46:33,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:46:33,173 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:33,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-13 21:46:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-12-13 21:46:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 21:46:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-12-13 21:46:33,193 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2022-12-13 21:46:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:33,193 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-12-13 21:46:33,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 21:46:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-12-13 21:46:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 21:46:33,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:33,195 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:33,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:46:33,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:33,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-12-13 21:46:33,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:33,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497596972] [2022-12-13 21:46:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:33,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991989110] [2022-12-13 21:46:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:33,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:33,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:33,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:46:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:33,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 21:46:33,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 21:46:33,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-13 21:46:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497596972] [2022-12-13 21:46:33,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991989110] [2022-12-13 21:46:33,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991989110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:33,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:33,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-12-13 21:46:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282643023] [2022-12-13 21:46:33,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:33,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 21:46:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 21:46:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:46:33,592 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-13 21:46:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:33,687 INFO L93 Difference]: Finished difference Result 199 states and 240 transitions. [2022-12-13 21:46:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 21:46:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-12-13 21:46:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:33,689 INFO L225 Difference]: With dead ends: 199 [2022-12-13 21:46:33,690 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 21:46:33,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:46:33,690 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:33,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:46:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 21:46:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2022-12-13 21:46:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 121 states have internal predecessors, (135), 38 states have call successors, (38), 21 states have call predecessors, (38), 20 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-13 21:46:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2022-12-13 21:46:33,706 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 49 [2022-12-13 21:46:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:33,706 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2022-12-13 21:46:33,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-13 21:46:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2022-12-13 21:46:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 21:46:33,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:33,707 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:33,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:46:33,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 21:46:33,909 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-12-13 21:46:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:33,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973917344] [2022-12-13 21:46:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:33,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699186273] [2022-12-13 21:46:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:33,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:33,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:33,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:46:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 21:46:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 21:46:34,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 21:46:35,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:35,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973917344] [2022-12-13 21:46:35,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699186273] [2022-12-13 21:46:35,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699186273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:35,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:35,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-13 21:46:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866769907] [2022-12-13 21:46:35,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:46:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:46:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:46:35,470 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-13 21:46:42,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 21:46:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:43,934 INFO L93 Difference]: Finished difference Result 267 states and 340 transitions. [2022-12-13 21:46:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 21:46:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2022-12-13 21:46:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:43,936 INFO L225 Difference]: With dead ends: 267 [2022-12-13 21:46:43,936 INFO L226 Difference]: Without dead ends: 219 [2022-12-13 21:46:43,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-12-13 21:46:43,937 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 61 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:43,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 149 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 481 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-12-13 21:46:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-13 21:46:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2022-12-13 21:46:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 140 states have (on average 1.2142857142857142) internal successors, (170), 148 states have internal predecessors, (170), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2022-12-13 21:46:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 254 transitions. [2022-12-13 21:46:43,965 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 254 transitions. Word has length 58 [2022-12-13 21:46:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:43,965 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 254 transitions. [2022-12-13 21:46:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-13 21:46:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 254 transitions. [2022-12-13 21:46:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 21:46:43,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:43,966 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:43,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:46:44,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:44,168 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-12-13 21:46:44,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:44,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827916786] [2022-12-13 21:46:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:44,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:44,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727715501] [2022-12-13 21:46:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:44,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:44,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:44,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:46:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 21:46:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 21:46:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 21:46:44,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:44,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827916786] [2022-12-13 21:46:44,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:44,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727715501] [2022-12-13 21:46:44,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727715501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:44,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:44,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-12-13 21:46:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749260944] [2022-12-13 21:46:44,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 21:46:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 21:46:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-13 21:46:44,924 INFO L87 Difference]: Start difference. First operand 208 states and 254 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-12-13 21:46:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:45,603 INFO L93 Difference]: Finished difference Result 260 states and 322 transitions. [2022-12-13 21:46:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 21:46:45,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2022-12-13 21:46:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:45,605 INFO L225 Difference]: With dead ends: 260 [2022-12-13 21:46:45,606 INFO L226 Difference]: Without dead ends: 209 [2022-12-13 21:46:45,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-13 21:46:45,607 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:45,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 128 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 21:46:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-12-13 21:46:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 186. [2022-12-13 21:46:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.168) internal successors, (146), 129 states have internal predecessors, (146), 37 states have call successors, (37), 24 states have call predecessors, (37), 23 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-13 21:46:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 218 transitions. [2022-12-13 21:46:45,639 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 218 transitions. Word has length 69 [2022-12-13 21:46:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:45,639 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 218 transitions. [2022-12-13 21:46:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-12-13 21:46:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 218 transitions. [2022-12-13 21:46:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 21:46:45,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:45,641 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2022-12-13 21:46:45,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 21:46:45,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 21:46:45,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2022-12-13 21:46:45,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:45,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155640987] [2022-12-13 21:46:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:45,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:45,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:45,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574641390] [2022-12-13 21:46:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:45,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:45,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:45,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:45,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:46:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:46:45,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 21:46:46,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 21:46:46,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155640987] [2022-12-13 21:46:46,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574641390] [2022-12-13 21:46:46,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574641390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:46,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:46,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-12-13 21:46:46,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638920564] [2022-12-13 21:46:46,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:46,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 21:46:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 21:46:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-13 21:46:46,407 INFO L87 Difference]: Start difference. First operand 186 states and 218 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-12-13 21:46:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:46,717 INFO L93 Difference]: Finished difference Result 210 states and 245 transitions. [2022-12-13 21:46:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:46:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-12-13 21:46:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:46,719 INFO L225 Difference]: With dead ends: 210 [2022-12-13 21:46:46,719 INFO L226 Difference]: Without dead ends: 165 [2022-12-13 21:46:46,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-13 21:46:46,720 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:46,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 157 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:46:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-13 21:46:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2022-12-13 21:46:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 112 states have internal predecessors, (123), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-13 21:46:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2022-12-13 21:46:46,742 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 74 [2022-12-13 21:46:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:46,743 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2022-12-13 21:46:46,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-12-13 21:46:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2022-12-13 21:46:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 21:46:46,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:46,744 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:46,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:46:46,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:46,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1496336062, now seen corresponding path program 2 times [2022-12-13 21:46:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:46,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902175941] [2022-12-13 21:46:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:46,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:46,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:46,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366360216] [2022-12-13 21:46:46,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:46:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:46,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:46,961 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:46,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:46:47,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:46:47,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:46:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:46:47,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-13 21:46:47,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-12-13 21:46:47,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902175941] [2022-12-13 21:46:47,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366360216] [2022-12-13 21:46:47,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366360216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:47,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:47,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-12-13 21:46:47,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363487190] [2022-12-13 21:46:47,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:47,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:46:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:46:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:46:47,149 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-12-13 21:46:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:47,232 INFO L93 Difference]: Finished difference Result 218 states and 262 transitions. [2022-12-13 21:46:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:46:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 87 [2022-12-13 21:46:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:47,234 INFO L225 Difference]: With dead ends: 218 [2022-12-13 21:46:47,234 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 21:46:47,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 160 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-12-13 21:46:47,235 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:47,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 21:46:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-12-13 21:46:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 109 states have (on average 1.146788990825688) internal successors, (125), 114 states have internal predecessors, (125), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-13 21:46:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2022-12-13 21:46:47,271 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 87 [2022-12-13 21:46:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:47,272 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2022-12-13 21:46:47,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-12-13 21:46:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2022-12-13 21:46:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 21:46:47,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:47,273 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 21:46:47,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:46:47,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:47,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-12-13 21:46:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:47,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34767637] [2022-12-13 21:46:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:47,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:47,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:47,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460763214] [2022-12-13 21:46:47,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:46:47,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:47,510 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:46:47,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:46:47,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:46:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 21:46:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 21:46:47,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-12-13 21:46:47,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:47,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34767637] [2022-12-13 21:46:47,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:46:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460763214] [2022-12-13 21:46:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460763214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:47,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:46:47,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-12-13 21:46:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434875367] [2022-12-13 21:46:47,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:47,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 21:46:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 21:46:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:46:47,715 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-12-13 21:46:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:46:47,812 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2022-12-13 21:46:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:46:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 90 [2022-12-13 21:46:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:46:47,813 INFO L225 Difference]: With dead ends: 209 [2022-12-13 21:46:47,813 INFO L226 Difference]: Without dead ends: 155 [2022-12-13 21:46:47,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:46:47,814 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 37 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:46:47,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 199 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:46:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-13 21:46:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-12-13 21:46:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 101 states have internal predecessors, (106), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-13 21:46:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2022-12-13 21:46:47,836 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 90 [2022-12-13 21:46:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:46:47,837 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2022-12-13 21:46:47,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-12-13 21:46:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2022-12-13 21:46:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 21:46:47,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:46:47,837 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:47,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 21:46:48,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:46:48,039 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:46:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1610071076, now seen corresponding path program 1 times [2022-12-13 21:46:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:48,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265643108] [2022-12-13 21:46:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:48,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:48,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:46:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177512553] [2022-12-13 21:46:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:48,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:48,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:48,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 21:46:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 21:46:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 21:46:48,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:47:00,829 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:47:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 21:47:24,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:47:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265643108] [2022-12-13 21:47:24,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:47:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177512553] [2022-12-13 21:47:24,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177512553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:47:24,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:47:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-12-13 21:47:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718084850] [2022-12-13 21:47:24,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:47:24,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 21:47:24,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:47:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 21:47:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-12-13 21:47:24,784 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2022-12-13 21:47:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:47:28,809 INFO L93 Difference]: Finished difference Result 181 states and 196 transitions. [2022-12-13 21:47:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 21:47:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 90 [2022-12-13 21:47:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:47:28,810 INFO L225 Difference]: With dead ends: 181 [2022-12-13 21:47:28,810 INFO L226 Difference]: Without dead ends: 179 [2022-12-13 21:47:28,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 21:47:28,811 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:47:28,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 280 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 21:47:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-13 21:47:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 148. [2022-12-13 21:47:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 104 states have internal predecessors, (109), 25 states have call successors, (25), 21 states have call predecessors, (25), 21 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 21:47:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2022-12-13 21:47:28,845 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 90 [2022-12-13 21:47:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:47:28,845 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2022-12-13 21:47:28,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2022-12-13 21:47:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2022-12-13 21:47:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 21:47:28,846 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:47:28,846 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:47:28,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 21:47:29,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 21:47:29,048 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:47:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:47:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1390349825, now seen corresponding path program 2 times [2022-12-13 21:47:29,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:47:29,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428040134] [2022-12-13 21:47:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:29,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:47:29,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:47:29,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642609206] [2022-12-13 21:47:29,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:47:29,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:47:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:47:29,070 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:47:29,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 21:47:29,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:47:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-13 21:47:29,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:47:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:47:29,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:47:29,176 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:47:29,177 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 21:47:29,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 21:47:29,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 21:47:29,381 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:47:29,383 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 21:47:29,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 09:47:29 BoogieIcfgContainer [2022-12-13 21:47:29,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 21:47:29,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 21:47:29,411 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 21:47:29,411 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 21:47:29,411 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:46:29" (3/4) ... [2022-12-13 21:47:29,413 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 21:47:29,447 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 21:47:29,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 21:47:29,447 INFO L158 Benchmark]: Toolchain (without parser) took 60471.66ms. Allocated memory is still 205.5MB. Free memory was 170.6MB in the beginning and 77.0MB in the end (delta: 93.7MB). Peak memory consumption was 95.0MB. Max. memory is 16.1GB. [2022-12-13 21:47:29,447 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 102.8MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 21:47:29,448 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.91ms. Allocated memory is still 205.5MB. Free memory was 170.6MB in the beginning and 160.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 21:47:29,448 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.01ms. Allocated memory is still 205.5MB. Free memory was 159.5MB in the beginning and 158.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 21:47:29,448 INFO L158 Benchmark]: Boogie Preprocessor took 15.04ms. Allocated memory is still 205.5MB. Free memory was 158.1MB in the beginning and 157.3MB in the end (delta: 819.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 21:47:29,448 INFO L158 Benchmark]: RCFGBuilder took 233.32ms. Allocated memory is still 205.5MB. Free memory was 157.3MB in the beginning and 145.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 21:47:29,448 INFO L158 Benchmark]: TraceAbstraction took 60000.76ms. Allocated memory is still 205.5MB. Free memory was 144.9MB in the beginning and 81.2MB in the end (delta: 63.7MB). Peak memory consumption was 65.6MB. Max. memory is 16.1GB. [2022-12-13 21:47:29,448 INFO L158 Benchmark]: Witness Printer took 35.90ms. Allocated memory is still 205.5MB. Free memory was 81.2MB in the beginning and 77.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 21:47:29,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 102.8MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 158.91ms. Allocated memory is still 205.5MB. Free memory was 170.6MB in the beginning and 160.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.01ms. Allocated memory is still 205.5MB. Free memory was 159.5MB in the beginning and 158.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.04ms. Allocated memory is still 205.5MB. Free memory was 158.1MB in the beginning and 157.3MB in the end (delta: 819.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 233.32ms. Allocated memory is still 205.5MB. Free memory was 157.3MB in the beginning and 145.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 60000.76ms. Allocated memory is still 205.5MB. Free memory was 144.9MB in the beginning and 81.2MB in the end (delta: 63.7MB). Peak memory consumption was 65.6MB. Max. memory is 16.1GB. * Witness Printer took 35.90ms. Allocated memory is still 205.5MB. Free memory was 81.2MB in the beginning and 77.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=4, B=1, counter=0, d=1, p=1, q=0, r=4] [L34] EXPR counter++ VAL [A=4, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=4] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=4, B=1, counter=1, d=2, p=2, q=0, r=4] [L34] EXPR counter++ VAL [A=4, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=4] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=4, B=1, counter=2, d=4, p=4, q=0, r=4] [L34] EXPR counter++ VAL [A=4, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=4] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=4, B=1, counter=3, d=8, p=8, q=0, r=4] [L34] EXPR counter++ VAL [A=4, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=4] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L38] COND TRUE !(r >= d) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L44] EXPR counter++ VAL [A=4, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=4] [L44] COND TRUE counter++<5 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=4, B=1, counter=5, d=4, p=4, q=0, r=4] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=4, B=1, counter=5, d=4, p=4, q=4, r=0] [L44] EXPR counter++ VAL [A=4, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=0] [L44] COND FALSE !(counter++<5) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.9s, OverallIterations: 15, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 15.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 464 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 421 mSDsluCounter, 1904 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1379 mSDsCounter, 310 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2605 IncrementalHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 310 mSolverCounterUnsat, 525 mSDtfsCounter, 2605 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1234 GetRequests, 1064 SyntacticMatches, 15 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 16.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=9, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 112 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 40.4s InterpolantComputationTime, 745 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1203 ConstructedInterpolants, 0 QuantifiedInterpolants, 15443 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1877 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 3064/3764 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 21:47:29,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc278a0-861d-4a67-886b-70f97c7531f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE