./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN --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 64bit --witnessprinter.graph.data.programhash 96d9860a7686f708af2c69f8c9732693665f35b4386bdf987f4dd5e89313b9fb --- 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-6b4ec56 [2022-11-20 11:10:39,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:10:39,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:10:39,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:10:39,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:10:39,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:10:39,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:10:39,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:10:39,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:10:39,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:10:39,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:10:39,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:10:39,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:10:39,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:10:39,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:10:39,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:10:39,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:10:39,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:10:39,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:10:39,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:10:39,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:10:39,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:10:39,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:10:39,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:10:39,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:10:39,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:10:39,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:10:39,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:10:39,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:10:39,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:10:39,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:10:39,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:10:39,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:10:39,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:10:39,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:10:39,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:10:39,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:10:39,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:10:39,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:10:39,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:10:39,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:10:39,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 11:10:39,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:10:39,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:10:39,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:10:39,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:10:39,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:10:39,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:10:39,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:10:39,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:10:39,332 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:10:39,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:10:39,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:10:39,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:10:39,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:10:39,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:10:39,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:10:39,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:10:39,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:10:39,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:10:39,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:10:39,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:10:39,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:10:39,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:39,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:10:39,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:10:39,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:10:39,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:10:39,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:10:39,338 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:10:39,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:10:39,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:10:39,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96d9860a7686f708af2c69f8c9732693665f35b4386bdf987f4dd5e89313b9fb [2022-11-20 11:10:39,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:10:39,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:10:39,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:10:39,727 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:10:39,727 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:10:39,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2022-11-20 11:10:43,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:10:43,705 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:10:43,706 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2022-11-20 11:10:43,724 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/data/aeecd7f03/b90c3a0f52764386b0b13561fb160766/FLAG185e29d40 [2022-11-20 11:10:43,741 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/data/aeecd7f03/b90c3a0f52764386b0b13561fb160766 [2022-11-20 11:10:43,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:10:43,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:10:43,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:43,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:10:43,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:10:43,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:43" (1/1) ... [2022-11-20 11:10:43,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378add08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:43, skipping insertion in model container [2022-11-20 11:10:43,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:43" (1/1) ... [2022-11-20 11:10:43,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:10:43,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:10:44,060 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_5fe9f365-4859-44e2-ba30-4a0a1cc53330/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1107,1120] [2022-11-20 11:10:44,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:44,430 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:10:44,443 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_5fe9f365-4859-44e2-ba30-4a0a1cc53330/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1107,1120] [2022-11-20 11:10:44,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:44,787 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:10:44,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44 WrapperNode [2022-11-20 11:10:44,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:44,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:10:44,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:10:44,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:10:44,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:44,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,005 INFO L138 Inliner]: procedures = 15, calls = 102, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1472 [2022-11-20 11:10:45,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:10:45,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:10:45,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:10:45,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:10:45,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,155 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:10:45,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:10:45,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:10:45,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:10:45,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (1/1) ... [2022-11-20 11:10:45,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:45,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:45,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:10:45,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:10:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 11:10:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 11:10:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:10:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:10:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:10:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:10:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:10:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:10:45,768 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:10:45,770 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:10:49,319 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:10:49,334 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:10:49,344 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-20 11:10:49,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:10:49 BoogieIcfgContainer [2022-11-20 11:10:49,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:10:49,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:10:49,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:10:49,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:10:49,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:10:43" (1/3) ... [2022-11-20 11:10:49,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69417f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:10:49, skipping insertion in model container [2022-11-20 11:10:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:44" (2/3) ... [2022-11-20 11:10:49,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69417f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:10:49, skipping insertion in model container [2022-11-20 11:10:49,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:10:49" (3/3) ... [2022-11-20 11:10:49,362 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2022-11-20 11:10:49,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:10:49,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:10:49,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:10:49,477 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;@4aeda42d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:10:49,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:10:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 72 states have (on average 1.5694444444444444) internal successors, (113), 73 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:10:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:10:49,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:49,499 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:49,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:10:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -192656096, now seen corresponding path program 1 times [2022-11-20 11:10:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:49,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782751153] [2022-11-20 11:10:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:49,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:10:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:10:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:10:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:10:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:10:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:10:50,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:50,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782751153] [2022-11-20 11:10:50,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782751153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:50,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:50,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:10:50,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559571756] [2022-11-20 11:10:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:10:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:10:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:10:50,323 INFO L87 Difference]: Start difference. First operand has 80 states, 72 states have (on average 1.5694444444444444) internal successors, (113), 73 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 11:10:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:50,357 INFO L93 Difference]: Finished difference Result 152 states and 242 transitions. [2022-11-20 11:10:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:10:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-20 11:10:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:50,369 INFO L225 Difference]: With dead ends: 152 [2022-11-20 11:10:50,369 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 11:10:50,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:10:50,380 INFO L413 NwaCegarLoop]: 98 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, 98 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 [2022-11-20 11:10:50,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:10:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 11:10:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-20 11:10:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:10:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-11-20 11:10:50,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 41 [2022-11-20 11:10:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:50,451 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-11-20 11:10:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 11:10:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-11-20 11:10:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:10:50,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:50,455 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:50,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:10:50,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:10:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1982758314, now seen corresponding path program 1 times [2022-11-20 11:10:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:50,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206001632] [2022-11-20 11:10:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:10:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:51,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:10:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:10:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:10:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:10:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:10:51,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206001632] [2022-11-20 11:10:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206001632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:51,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:51,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:10:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588936419] [2022-11-20 11:10:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:51,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:10:51,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:10:51,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:10:51,367 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:10:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:51,418 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2022-11-20 11:10:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:10:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-11-20 11:10:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:51,423 INFO L225 Difference]: With dead ends: 150 [2022-11-20 11:10:51,423 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:10:51,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:10:51,431 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:51,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 190 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:10:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:10:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-20 11:10:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:10:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-11-20 11:10:51,450 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 41 [2022-11-20 11:10:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:51,450 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-11-20 11:10:51,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:10:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-11-20 11:10:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:10:51,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:51,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:51,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:10:51,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:10:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash 965752724, now seen corresponding path program 1 times [2022-11-20 11:10:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:51,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414238986] [2022-11-20 11:10:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 11:10:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:10:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:10:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:10:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:10:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:10:52,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414238986] [2022-11-20 11:10:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414238986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819947274] [2022-11-20 11:10:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:52,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:52,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:52,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:52,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:10:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:52,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:10:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:10:52,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:10:52,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819947274] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:52,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:52,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-20 11:10:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47035232] [2022-11-20 11:10:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:10:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:10:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:10:52,962 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:10:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:52,990 INFO L93 Difference]: Finished difference Result 144 states and 186 transitions. [2022-11-20 11:10:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:10:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2022-11-20 11:10:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:52,993 INFO L225 Difference]: With dead ends: 144 [2022-11-20 11:10:52,993 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:10:52,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:10:52,995 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:52,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:10:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:10:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-20 11:10:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:10:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-11-20 11:10:53,005 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 43 [2022-11-20 11:10:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:53,005 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-11-20 11:10:53,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:10:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-11-20 11:10:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:10:53,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:53,007 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:53,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:10:53,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:53,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:10:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1295353042, now seen corresponding path program 1 times [2022-11-20 11:10:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763968702] [2022-11-20 11:10:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:53,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:10:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:53,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:10:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:10:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:53,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:10:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:53,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:10:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:10:53,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763968702] [2022-11-20 11:10:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763968702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148826099] [2022-11-20 11:10:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:53,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:53,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:53,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:53,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:10:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:10:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:10:54,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:10:54,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148826099] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:54,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:54,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-20 11:10:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529384167] [2022-11-20 11:10:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:54,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:10:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:10:54,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:10:54,974 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:10:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:55,000 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2022-11-20 11:10:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:10:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-11-20 11:10:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:55,020 INFO L225 Difference]: With dead ends: 149 [2022-11-20 11:10:55,021 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 11:10:55,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:10:55,022 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:55,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:10:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 11:10:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-20 11:10:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 72 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:10:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-11-20 11:10:55,030 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 45 [2022-11-20 11:10:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:55,031 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-11-20 11:10:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:10:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-11-20 11:10:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:10:55,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:55,033 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:55,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:55,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:10:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1815837392, now seen corresponding path program 1 times [2022-11-20 11:10:55,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:55,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548368131] [2022-11-20 11:10:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:10:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:10:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:10:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:10:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:10:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:10:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548368131] [2022-11-20 11:10:55,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548368131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144122837] [2022-11-20 11:10:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:55,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:55,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:55,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:10:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:10:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:10:57,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:10:58,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144122837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:58,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:58,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 8] total 12 [2022-11-20 11:10:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338356460] [2022-11-20 11:10:58,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:10:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:10:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:10:58,885 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:11:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:01,121 INFO L93 Difference]: Finished difference Result 211 states and 275 transitions. [2022-11-20 11:11:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:11:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 47 [2022-11-20 11:11:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:01,129 INFO L225 Difference]: With dead ends: 211 [2022-11-20 11:11:01,129 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 11:11:01,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:11:01,131 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 345 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:01,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 471 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:11:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 11:11:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2022-11-20 11:11:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2022-11-20 11:11:01,158 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 47 [2022-11-20 11:11:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:01,159 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2022-11-20 11:11:01,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:11:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2022-11-20 11:11:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 11:11:01,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:01,163 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:01,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:01,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:01,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:01,374 INFO L85 PathProgramCache]: Analyzing trace with hash -530753061, now seen corresponding path program 1 times [2022-11-20 11:11:01,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:01,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079977660] [2022-11-20 11:11:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 11:11:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 11:11:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 11:11:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 11:11:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 11:11:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-11-20 11:11:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:03,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079977660] [2022-11-20 11:11:03,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079977660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820059515] [2022-11-20 11:11:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:03,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:03,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:03,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:11:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:11:04,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 112 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-20 11:11:04,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-20 11:11:04,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820059515] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:04,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 11:11:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308578238] [2022-11-20 11:11:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:04,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:04,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:04,578 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:04,604 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2022-11-20 11:11:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:04,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 113 [2022-11-20 11:11:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:04,606 INFO L225 Difference]: With dead ends: 159 [2022-11-20 11:11:04,606 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 11:11:04,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:04,607 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:04,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 11:11:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-20 11:11:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2022-11-20 11:11:04,623 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 113 [2022-11-20 11:11:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:04,628 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2022-11-20 11:11:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2022-11-20 11:11:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 11:11:04,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:04,630 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:04,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:04,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:04,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1239318621, now seen corresponding path program 1 times [2022-11-20 11:11:04,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:04,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434374542] [2022-11-20 11:11:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:04,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 11:11:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 11:11:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 11:11:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 11:11:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 11:11:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-20 11:11:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434374542] [2022-11-20 11:11:06,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434374542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445497415] [2022-11-20 11:11:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:06,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:06,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:11:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:11:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 112 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-20 11:11:07,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-11-20 11:11:07,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445497415] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:07,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:07,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 11:11:07,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5744136] [2022-11-20 11:11:07,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:07,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:07,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:07,794 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:07,821 INFO L93 Difference]: Finished difference Result 161 states and 208 transitions. [2022-11-20 11:11:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 115 [2022-11-20 11:11:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:07,824 INFO L225 Difference]: With dead ends: 161 [2022-11-20 11:11:07,824 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 11:11:07,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:07,826 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:07,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 11:11:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-20 11:11:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 83 states have internal predecessors, (102), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2022-11-20 11:11:07,843 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 115 [2022-11-20 11:11:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:07,844 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2022-11-20 11:11:07,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2022-11-20 11:11:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 11:11:07,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:07,847 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:07,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 11:11:08,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:08,063 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash 603604639, now seen corresponding path program 1 times [2022-11-20 11:11:08,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:08,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792884245] [2022-11-20 11:11:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:08,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-20 11:11:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 11:11:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-20 11:11:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 11:11:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:11:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-20 11:11:09,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792884245] [2022-11-20 11:11:09,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792884245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:09,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434112299] [2022-11-20 11:11:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:09,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:11:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:10,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:11:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 112 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 11:11:11,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-20 11:11:11,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434112299] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:11,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:11,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 11:11:11,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071262884] [2022-11-20 11:11:11,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:11,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:11,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:11,077 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:11,103 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2022-11-20 11:11:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:11,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 117 [2022-11-20 11:11:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:11,105 INFO L225 Difference]: With dead ends: 163 [2022-11-20 11:11:11,105 INFO L226 Difference]: Without dead ends: 96 [2022-11-20 11:11:11,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:11,106 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:11,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-20 11:11:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-20 11:11:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-11-20 11:11:11,120 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 117 [2022-11-20 11:11:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:11,121 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-11-20 11:11:11,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-11-20 11:11:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 11:11:11,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:11,123 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:11,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:11,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1144573089, now seen corresponding path program 1 times [2022-11-20 11:11:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461456948] [2022-11-20 11:11:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 11:11:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 11:11:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 11:11:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 11:11:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-20 11:11:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-20 11:11:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461456948] [2022-11-20 11:11:12,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461456948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883255006] [2022-11-20 11:11:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:12,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:12,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:11:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:11:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 112 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-20 11:11:14,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-20 11:11:14,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883255006] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:14,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:14,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 11:11:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591114339] [2022-11-20 11:11:14,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:14,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:14,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:14,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:14,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:14,391 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:14,417 INFO L93 Difference]: Finished difference Result 165 states and 212 transitions. [2022-11-20 11:11:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 119 [2022-11-20 11:11:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:14,423 INFO L225 Difference]: With dead ends: 165 [2022-11-20 11:11:14,424 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 11:11:14,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:14,427 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:14,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 11:11:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-20 11:11:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-11-20 11:11:14,446 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 119 [2022-11-20 11:11:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:14,446 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-11-20 11:11:14,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-11-20 11:11:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 11:11:14,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:14,453 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:14,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:11:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 11:11:14,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 396243555, now seen corresponding path program 1 times [2022-11-20 11:11:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:14,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547490351] [2022-11-20 11:11:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-20 11:11:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 11:11:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 11:11:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 11:11:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 11:11:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-20 11:11:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547490351] [2022-11-20 11:11:16,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547490351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512982315] [2022-11-20 11:11:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:16,035 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:16,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:11:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:11:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 112 proven. 1 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-20 11:11:17,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 11:11:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512982315] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:17,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 11:11:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113107208] [2022-11-20 11:11:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:17,483 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:17,510 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2022-11-20 11:11:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 121 [2022-11-20 11:11:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:17,512 INFO L225 Difference]: With dead ends: 167 [2022-11-20 11:11:17,512 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:11:17,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:17,514 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:17,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:11:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-20 11:11:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 86 states have internal predecessors, (105), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2022-11-20 11:11:17,530 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 121 [2022-11-20 11:11:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:17,530 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2022-11-20 11:11:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2022-11-20 11:11:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 11:11:17,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:17,533 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:17,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:11:17,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash 615159781, now seen corresponding path program 1 times [2022-11-20 11:11:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:17,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50941972] [2022-11-20 11:11:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:17,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 11:11:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-20 11:11:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 11:11:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:11:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 11:11:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-11-20 11:11:19,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:19,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50941972] [2022-11-20 11:11:19,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50941972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925220492] [2022-11-20 11:11:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:19,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:19,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:19,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:11:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-20 11:11:20,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-20 11:11:20,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925220492] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:20,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:20,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:20,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698681380] [2022-11-20 11:11:20,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:20,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:20,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:20,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:20,682 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:20,710 INFO L93 Difference]: Finished difference Result 169 states and 216 transitions. [2022-11-20 11:11:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2022-11-20 11:11:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:20,712 INFO L225 Difference]: With dead ends: 169 [2022-11-20 11:11:20,712 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 11:11:20,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:20,713 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:20,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 11:11:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-20 11:11:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 87 states have internal predecessors, (106), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-11-20 11:11:20,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 123 [2022-11-20 11:11:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:20,727 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-11-20 11:11:20,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-11-20 11:11:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-20 11:11:20,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:20,729 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:20,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:11:20,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1297751335, now seen corresponding path program 1 times [2022-11-20 11:11:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807757700] [2022-11-20 11:11:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 11:11:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 11:11:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 11:11:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-20 11:11:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-20 11:11:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-20 11:11:22,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:22,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807757700] [2022-11-20 11:11:22,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807757700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:22,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615715940] [2022-11-20 11:11:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:22,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:22,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:11:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 2760 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 11:11:23,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-20 11:11:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615715940] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:23,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:23,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319625921] [2022-11-20 11:11:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:23,843 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:23,871 INFO L93 Difference]: Finished difference Result 171 states and 218 transitions. [2022-11-20 11:11:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2022-11-20 11:11:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:23,874 INFO L225 Difference]: With dead ends: 171 [2022-11-20 11:11:23,875 INFO L226 Difference]: Without dead ends: 100 [2022-11-20 11:11:23,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:23,876 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:23,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-20 11:11:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-20 11:11:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 88 states have internal predecessors, (107), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-11-20 11:11:23,893 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 125 [2022-11-20 11:11:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-11-20 11:11:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-11-20 11:11:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 11:11:23,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:23,898 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:23,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:24,114 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -786111959, now seen corresponding path program 1 times [2022-11-20 11:11:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:24,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073279096] [2022-11-20 11:11:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 11:11:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 11:11:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 11:11:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 11:11:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-20 11:11:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2022-11-20 11:11:25,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:25,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073279096] [2022-11-20 11:11:25,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073279096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:25,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643972014] [2022-11-20 11:11:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:25,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:25,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:25,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:25,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:11:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 2767 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 11:11:26,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-11-20 11:11:26,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643972014] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:26,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:26,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175451726] [2022-11-20 11:11:26,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:26,955 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:26,983 INFO L93 Difference]: Finished difference Result 173 states and 220 transitions. [2022-11-20 11:11:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:26,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 127 [2022-11-20 11:11:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:26,985 INFO L225 Difference]: With dead ends: 173 [2022-11-20 11:11:26,985 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 11:11:26,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:26,987 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:26,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 11:11:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-20 11:11:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 89 states have internal predecessors, (108), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2022-11-20 11:11:27,002 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 127 [2022-11-20 11:11:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:27,003 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2022-11-20 11:11:27,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2022-11-20 11:11:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 11:11:27,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:27,005 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:27,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:27,219 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash 251594475, now seen corresponding path program 1 times [2022-11-20 11:11:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888924456] [2022-11-20 11:11:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-20 11:11:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 11:11:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:11:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 11:11:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-20 11:11:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-11-20 11:11:28,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888924456] [2022-11-20 11:11:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888924456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050226108] [2022-11-20 11:11:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:28,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:28,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:28,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:11:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-20 11:11:29,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-11-20 11:11:29,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050226108] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:29,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:29,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325490310] [2022-11-20 11:11:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:29,939 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:29,968 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2022-11-20 11:11:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 129 [2022-11-20 11:11:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:29,970 INFO L225 Difference]: With dead ends: 175 [2022-11-20 11:11:29,970 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 11:11:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:29,972 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:29,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 11:11:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-20 11:11:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.211111111111111) internal successors, (109), 90 states have internal predecessors, (109), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2022-11-20 11:11:29,986 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 129 [2022-11-20 11:11:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:29,987 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2022-11-20 11:11:29,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2022-11-20 11:11:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-20 11:11:29,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:29,989 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:30,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:30,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:11:30,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 123251565, now seen corresponding path program 1 times [2022-11-20 11:11:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:30,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048187764] [2022-11-20 11:11:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-20 11:11:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 11:11:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-20 11:11:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-20 11:11:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-20 11:11:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2022-11-20 11:11:31,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:31,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048187764] [2022-11-20 11:11:31,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048187764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:31,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508367043] [2022-11-20 11:11:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:31,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:31,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:11:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 2781 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-20 11:11:32,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-20 11:11:32,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508367043] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:32,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:32,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950426016] [2022-11-20 11:11:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:32,900 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:32,927 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2022-11-20 11:11:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 131 [2022-11-20 11:11:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:32,930 INFO L225 Difference]: With dead ends: 177 [2022-11-20 11:11:32,930 INFO L226 Difference]: Without dead ends: 103 [2022-11-20 11:11:32,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:32,931 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:32,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-20 11:11:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-20 11:11:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 91 states have internal predecessors, (110), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2022-11-20 11:11:32,947 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 131 [2022-11-20 11:11:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:32,948 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2022-11-20 11:11:32,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2022-11-20 11:11:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-20 11:11:32,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:32,952 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:32,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:11:33,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1642205265, now seen corresponding path program 1 times [2022-11-20 11:11:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742820293] [2022-11-20 11:11:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-20 11:11:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 11:11:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 11:11:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-20 11:11:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-20 11:11:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-20 11:11:34,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742820293] [2022-11-20 11:11:34,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742820293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379305934] [2022-11-20 11:11:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:34,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:11:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2788 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 11:11:35,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-20 11:11:35,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379305934] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:35,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:35,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:35,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624587035] [2022-11-20 11:11:35,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:35,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:35,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:35,787 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:35,818 INFO L93 Difference]: Finished difference Result 179 states and 226 transitions. [2022-11-20 11:11:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 133 [2022-11-20 11:11:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:35,820 INFO L225 Difference]: With dead ends: 179 [2022-11-20 11:11:35,820 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 11:11:35,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:35,821 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:35,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:35,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 11:11:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-11-20 11:11:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 92 states have internal predecessors, (111), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2022-11-20 11:11:35,834 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 133 [2022-11-20 11:11:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:35,835 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2022-11-20 11:11:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2022-11-20 11:11:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 11:11:35,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:35,837 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:35,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:36,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:11:36,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1665731663, now seen corresponding path program 1 times [2022-11-20 11:11:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:36,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356263551] [2022-11-20 11:11:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 11:11:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:11:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 11:11:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-20 11:11:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:11:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-20 11:11:37,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356263551] [2022-11-20 11:11:37,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356263551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476264629] [2022-11-20 11:11:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:37,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:37,168 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:37,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:11:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:38,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 11:11:38,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-20 11:11:38,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476264629] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:38,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:38,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768518646] [2022-11-20 11:11:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:38,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:38,885 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:38,930 INFO L93 Difference]: Finished difference Result 181 states and 228 transitions. [2022-11-20 11:11:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 135 [2022-11-20 11:11:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:38,932 INFO L225 Difference]: With dead ends: 181 [2022-11-20 11:11:38,932 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 11:11:38,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:38,937 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:38,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 11:11:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 11:11:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.2043010752688172) internal successors, (112), 93 states have internal predecessors, (112), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2022-11-20 11:11:38,960 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 135 [2022-11-20 11:11:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:38,960 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2022-11-20 11:11:38,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2022-11-20 11:11:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 11:11:38,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:38,963 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:38,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:39,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:11:39,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1946670963, now seen corresponding path program 1 times [2022-11-20 11:11:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:39,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488108755] [2022-11-20 11:11:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 11:11:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-20 11:11:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-20 11:11:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-20 11:11:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-20 11:11:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-20 11:11:40,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488108755] [2022-11-20 11:11:40,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488108755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009897600] [2022-11-20 11:11:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:40,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:40,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:40,531 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:40,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:11:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2802 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:11:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 112 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 11:11:42,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-20 11:11:42,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009897600] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:42,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:42,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 11:11:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544932249] [2022-11-20 11:11:42,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:42,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:42,119 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:42,155 INFO L93 Difference]: Finished difference Result 183 states and 230 transitions. [2022-11-20 11:11:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 137 [2022-11-20 11:11:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:42,156 INFO L225 Difference]: With dead ends: 183 [2022-11-20 11:11:42,157 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 11:11:42,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:11:42,158 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:42,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 11:11:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-20 11:11:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.202127659574468) internal successors, (113), 94 states have internal predecessors, (113), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2022-11-20 11:11:42,171 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 137 [2022-11-20 11:11:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:42,172 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2022-11-20 11:11:42,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2022-11-20 11:11:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 11:11:42,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:42,174 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:42,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 11:11:42,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:11:42,391 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:42,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1099908363, now seen corresponding path program 1 times [2022-11-20 11:11:42,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736608036] [2022-11-20 11:11:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-20 11:11:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 11:11:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-20 11:11:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-20 11:11:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-20 11:11:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-20 11:11:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736608036] [2022-11-20 11:11:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736608036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914048652] [2022-11-20 11:11:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:43,383 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:43,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:11:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:45,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2809 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 11:11:45,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-11-20 11:11:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914048652] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:45,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:45,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33659106] [2022-11-20 11:11:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:45,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:45,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:45,150 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:45,182 INFO L93 Difference]: Finished difference Result 185 states and 232 transitions. [2022-11-20 11:11:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 139 [2022-11-20 11:11:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:45,184 INFO L225 Difference]: With dead ends: 185 [2022-11-20 11:11:45,184 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 11:11:45,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:45,185 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:45,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 11:11:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-20 11:11:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.2) internal successors, (114), 95 states have internal predecessors, (114), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-11-20 11:11:45,199 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 139 [2022-11-20 11:11:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:45,200 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-11-20 11:11:45,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-11-20 11:11:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 11:11:45,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:45,202 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:45,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:45,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:45,415 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:45,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2117222857, now seen corresponding path program 1 times [2022-11-20 11:11:45,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:45,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988651007] [2022-11-20 11:11:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:45,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:11:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-20 11:11:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-20 11:11:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:11:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:11:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-20 11:11:46,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988651007] [2022-11-20 11:11:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988651007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461452802] [2022-11-20 11:11:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:46,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:46,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:46,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:11:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2816 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:11:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-20 11:11:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-20 11:11:48,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461452802] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:48,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:48,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2022-11-20 11:11:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873316724] [2022-11-20 11:11:48,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:48,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:48,136 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:48,168 INFO L93 Difference]: Finished difference Result 187 states and 234 transitions. [2022-11-20 11:11:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 141 [2022-11-20 11:11:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:48,170 INFO L225 Difference]: With dead ends: 187 [2022-11-20 11:11:48,170 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:11:48,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:11:48,171 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:48,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:11:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:11:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-20 11:11:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.1979166666666667) internal successors, (115), 96 states have internal predecessors, (115), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2022-11-20 11:11:48,186 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 141 [2022-11-20 11:11:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:48,186 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2022-11-20 11:11:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:11:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2022-11-20 11:11:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 11:11:48,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:48,189 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:48,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:48,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:48,395 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash 829882681, now seen corresponding path program 1 times [2022-11-20 11:11:48,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:48,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586065480] [2022-11-20 11:11:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:48,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 11:11:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:11:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:11:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:11:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:11:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-20 11:11:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-20 11:11:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-20 11:11:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-20 11:11:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:11:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-20 11:11:49,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:49,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586065480] [2022-11-20 11:11:49,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586065480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:49,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152542036] [2022-11-20 11:11:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:49,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:49,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:49,280 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:49,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:11:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:11:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-20 11:11:51,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-20 11:11:51,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152542036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:51,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:11:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2022-11-20 11:11:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968910528] [2022-11-20 11:11:51,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:11:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:11:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:11:51,241 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:11:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:51,381 INFO L93 Difference]: Finished difference Result 218 states and 275 transitions. [2022-11-20 11:11:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:11:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 143 [2022-11-20 11:11:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:51,383 INFO L225 Difference]: With dead ends: 218 [2022-11-20 11:11:51,383 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 11:11:51,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:11:51,385 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 7 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:51,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 551 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:11:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 11:11:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-11-20 11:11:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-11-20 11:11:51,408 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 143 [2022-11-20 11:11:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:51,409 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-11-20 11:11:51,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:11:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-11-20 11:11:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-20 11:11:51,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:51,412 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:51,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:51,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:51,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1484533169, now seen corresponding path program 2 times [2022-11-20 11:11:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890169541] [2022-11-20 11:11:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:51,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:11:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:11:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:11:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:11:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:11:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-20 11:11:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-20 11:11:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-20 11:11:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-20 11:11:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-20 11:11:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-11-20 11:11:52,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890169541] [2022-11-20 11:11:52,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890169541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291209653] [2022-11-20 11:11:52,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:11:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:52,632 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:52,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:11:54,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:11:54,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:11:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-11-20 11:11:54,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-20 11:11:55,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291209653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:55,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:11:55,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2022-11-20 11:11:55,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245190508] [2022-11-20 11:11:55,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:55,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:11:55,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:11:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:11:55,031 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:11:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:55,238 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2022-11-20 11:11:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:11:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 151 [2022-11-20 11:11:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:55,241 INFO L225 Difference]: With dead ends: 226 [2022-11-20 11:11:55,241 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:11:55,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:11:55,242 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 81 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:55,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 932 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:11:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:11:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-11-20 11:11:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.179245283018868) internal successors, (125), 106 states have internal predecessors, (125), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:11:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2022-11-20 11:11:55,261 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 151 [2022-11-20 11:11:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:55,261 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2022-11-20 11:11:55,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:11:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2022-11-20 11:11:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-20 11:11:55,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:55,263 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:55,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:55,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:55,471 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 448165487, now seen corresponding path program 3 times [2022-11-20 11:11:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:55,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501674135] [2022-11-20 11:11:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:55,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:11:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:11:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:11:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:11:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:11:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-20 11:11:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:11:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:11:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-20 11:11:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-20 11:11:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 11:11:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:56,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501674135] [2022-11-20 11:11:56,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501674135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337018016] [2022-11-20 11:11:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:11:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:56,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:56,443 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:56,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:12:04,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:12:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:12:04,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 11:12:04,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 11:12:04,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337018016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:04,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:04,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-11-20 11:12:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242369816] [2022-11-20 11:12:04,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:04,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:12:04,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:12:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:12:04,499 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:12:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:05,690 INFO L93 Difference]: Finished difference Result 224 states and 277 transitions. [2022-11-20 11:12:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:12:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 153 [2022-11-20 11:12:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:05,697 INFO L225 Difference]: With dead ends: 224 [2022-11-20 11:12:05,698 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 11:12:05,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:12:05,703 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 86 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:05,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 340 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:12:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 11:12:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-11-20 11:12:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:12:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2022-11-20 11:12:05,720 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 153 [2022-11-20 11:12:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:05,721 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2022-11-20 11:12:05,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:12:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2022-11-20 11:12:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-20 11:12:05,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:05,729 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:05,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:05,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:12:05,943 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 421119853, now seen corresponding path program 4 times [2022-11-20 11:12:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126728972] [2022-11-20 11:12:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:12:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:12:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:12:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:12:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:12:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-20 11:12:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-20 11:12:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:12:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:12:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:12:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-20 11:12:07,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:07,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126728972] [2022-11-20 11:12:07,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126728972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:07,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366605940] [2022-11-20 11:12:07,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:12:07,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:07,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:07,166 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:07,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:12:09,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:12:09,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:12:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-20 11:12:09,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-20 11:12:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366605940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:09,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:09,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:12:09,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838609375] [2022-11-20 11:12:09,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:09,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:12:09,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:09,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:12:09,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:12:09,486 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:12:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:09,592 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2022-11-20 11:12:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:12:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 155 [2022-11-20 11:12:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:09,594 INFO L225 Difference]: With dead ends: 204 [2022-11-20 11:12:09,594 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 11:12:09,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:12:09,595 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 5 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:09,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 458 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:12:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 11:12:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-20 11:12:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 states have internal predecessors, (129), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:12:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 149 transitions. [2022-11-20 11:12:09,614 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 149 transitions. Word has length 155 [2022-11-20 11:12:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:09,615 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 149 transitions. [2022-11-20 11:12:09,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:12:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 149 transitions. [2022-11-20 11:12:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-20 11:12:09,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:09,617 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:09,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 11:12:09,838 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:09,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2033279343, now seen corresponding path program 5 times [2022-11-20 11:12:09,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:09,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091817210] [2022-11-20 11:12:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:12:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:12:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:12:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:12:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:12:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-20 11:12:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-20 11:12:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-20 11:12:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-20 11:12:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-20 11:12:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-11-20 11:12:10,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091817210] [2022-11-20 11:12:10,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091817210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351720977] [2022-11-20 11:12:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:12:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:10,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:10,742 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:10,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:12:14,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 11:12:14,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:14,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:12:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-20 11:12:14,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-11-20 11:12:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351720977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:14,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-11-20 11:12:14,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041919776] [2022-11-20 11:12:14,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:12:14,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:12:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:12:14,727 INFO L87 Difference]: Start difference. First operand 122 states and 149 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:12:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:14,882 INFO L93 Difference]: Finished difference Result 211 states and 259 transitions. [2022-11-20 11:12:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:12:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2022-11-20 11:12:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:14,884 INFO L225 Difference]: With dead ends: 211 [2022-11-20 11:12:14,884 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 11:12:14,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:12:14,885 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 5 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:14,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 626 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:12:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 11:12:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-11-20 11:12:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:12:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2022-11-20 11:12:14,906 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 157 [2022-11-20 11:12:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:14,906 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2022-11-20 11:12:14,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:12:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2022-11-20 11:12:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-20 11:12:14,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:14,909 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:14,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:15,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:12:15,123 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash -93473485, now seen corresponding path program 6 times [2022-11-20 11:12:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:15,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743026603] [2022-11-20 11:12:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:15,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:12:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:12:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:12:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:12:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:12:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-20 11:12:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:12:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:12:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:12:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-20 11:12:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 11:12:16,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:16,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743026603] [2022-11-20 11:12:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743026603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:16,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723957295] [2022-11-20 11:12:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:12:16,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:16,136 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:14:01,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:14:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:01,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-20 11:14:01,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 11:14:01,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723957295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:01,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:01,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:14:01,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782478623] [2022-11-20 11:14:01,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:01,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:14:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:14:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:01,281 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:14:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:01,380 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2022-11-20 11:14:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:14:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2022-11-20 11:14:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:01,383 INFO L225 Difference]: With dead ends: 216 [2022-11-20 11:14:01,383 INFO L226 Difference]: Without dead ends: 130 [2022-11-20 11:14:01,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:01,384 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 4 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:01,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 458 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-20 11:14:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-11-20 11:14:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:14:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2022-11-20 11:14:01,404 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 161 [2022-11-20 11:14:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:01,405 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2022-11-20 11:14:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:14:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2022-11-20 11:14:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-20 11:14:01,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:01,407 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:01,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:01,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:01,623 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:01,623 INFO L85 PathProgramCache]: Analyzing trace with hash 365422133, now seen corresponding path program 7 times [2022-11-20 11:14:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:01,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259338815] [2022-11-20 11:14:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:14:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:14:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:14:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:14:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:14:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-20 11:14:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-20 11:14:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-20 11:14:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-20 11:14:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-11-20 11:14:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-20 11:14:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259338815] [2022-11-20 11:14:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259338815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:02,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745660470] [2022-11-20 11:14:02,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:14:02,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:02,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:02,607 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:02,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 11:14:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-20 11:14:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-20 11:14:05,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745660470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:05,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:05,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:14:05,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999216220] [2022-11-20 11:14:05,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:05,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:14:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:14:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:05,094 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:14:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:05,196 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2022-11-20 11:14:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:14:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 163 [2022-11-20 11:14:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:05,198 INFO L225 Difference]: With dead ends: 220 [2022-11-20 11:14:05,199 INFO L226 Difference]: Without dead ends: 132 [2022-11-20 11:14:05,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:05,200 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 5 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:05,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 458 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-20 11:14:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-11-20 11:14:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 118 states have internal predecessors, (137), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:14:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2022-11-20 11:14:05,221 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 163 [2022-11-20 11:14:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:05,222 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2022-11-20 11:14:05,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:14:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2022-11-20 11:14:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-20 11:14:05,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:05,224 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:05,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:14:05,434 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1108371191, now seen corresponding path program 8 times [2022-11-20 11:14:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:05,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814226408] [2022-11-20 11:14:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:14:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:14:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:14:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:14:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:14:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:14:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-20 11:14:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-20 11:14:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-20 11:14:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-20 11:14:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-20 11:14:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:06,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814226408] [2022-11-20 11:14:06,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814226408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:06,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995335769] [2022-11-20 11:14:06,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:06,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:06,681 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:06,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 11:14:09,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2900 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 112 proven. 11 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-20 11:14:09,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-20 11:14:09,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995335769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:09,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:09,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:14:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539427658] [2022-11-20 11:14:09,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:14:09,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:14:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:09,931 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:14:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:10,110 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2022-11-20 11:14:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:14:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 165 [2022-11-20 11:14:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:10,112 INFO L225 Difference]: With dead ends: 226 [2022-11-20 11:14:10,112 INFO L226 Difference]: Without dead ends: 136 [2022-11-20 11:14:10,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:14:10,114 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 6 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:10,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 642 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-20 11:14:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-11-20 11:14:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:14:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2022-11-20 11:14:10,137 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 165 [2022-11-20 11:14:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:10,138 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2022-11-20 11:14:10,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:14:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2022-11-20 11:14:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-20 11:14:10,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:10,140 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:10,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:14:10,359 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1052153789, now seen corresponding path program 9 times [2022-11-20 11:14:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:10,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438848958] [2022-11-20 11:14:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:14:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:14:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:14:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:14:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:14:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-20 11:14:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-20 11:14:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-20 11:14:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-20 11:14:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-20 11:14:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-11-20 11:14:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:11,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438848958] [2022-11-20 11:14:11,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438848958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007838119] [2022-11-20 11:14:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:11,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:11,433 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:11,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 11:16:16,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:16:16,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:16,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:16:16,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 11:16:16,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-11-20 11:16:16,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007838119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:16,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:16,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-11-20 11:16:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009387912] [2022-11-20 11:16:16,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:16:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:16,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:16:16,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:16:16,712 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:16:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:16,881 INFO L93 Difference]: Finished difference Result 242 states and 292 transitions. [2022-11-20 11:16:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:16:16,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 171 [2022-11-20 11:16:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:16,883 INFO L225 Difference]: With dead ends: 242 [2022-11-20 11:16:16,883 INFO L226 Difference]: Without dead ends: 146 [2022-11-20 11:16:16,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:16:16,885 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 8 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:16,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 537 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:16:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-20 11:16:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-11-20 11:16:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.143939393939394) internal successors, (151), 132 states have internal predecessors, (151), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:16:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2022-11-20 11:16:16,908 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 171 [2022-11-20 11:16:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:16,909 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2022-11-20 11:16:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:16:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2022-11-20 11:16:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-20 11:16:16,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:16,911 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:16,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:17,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:16:17,127 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash 221540357, now seen corresponding path program 10 times [2022-11-20 11:16:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:17,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12245506] [2022-11-20 11:16:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:16:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:16:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:16:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:16:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:16:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:16:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-20 11:16:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-11-20 11:16:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-20 11:16:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-20 11:16:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-20 11:16:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12245506] [2022-11-20 11:16:18,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12245506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955324046] [2022-11-20 11:16:18,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:16:18,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:18,247 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:18,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 11:16:20,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:16:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:16:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 112 proven. 18 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-20 11:16:20,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-20 11:16:21,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955324046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:21,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:21,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 12 [2022-11-20 11:16:21,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474958434] [2022-11-20 11:16:21,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:21,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:16:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:16:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:16:21,109 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:16:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:22,018 INFO L93 Difference]: Finished difference Result 252 states and 300 transitions. [2022-11-20 11:16:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:16:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 179 [2022-11-20 11:16:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:22,020 INFO L225 Difference]: With dead ends: 252 [2022-11-20 11:16:22,021 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 11:16:22,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:16:22,028 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:22,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 643 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:16:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 11:16:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-20 11:16:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 136 states have internal predecessors, (155), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:16:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 175 transitions. [2022-11-20 11:16:22,051 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 175 transitions. Word has length 179 [2022-11-20 11:16:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:22,052 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 175 transitions. [2022-11-20 11:16:22,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:16:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 175 transitions. [2022-11-20 11:16:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-20 11:16:22,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:22,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:22,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:22,258 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash -120503671, now seen corresponding path program 11 times [2022-11-20 11:16:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:22,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422774167] [2022-11-20 11:16:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:16:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:16:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:16:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:16:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:16:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-20 11:16:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-20 11:16:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-20 11:16:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-20 11:16:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-20 11:16:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:16:23,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422774167] [2022-11-20 11:16:23,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422774167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968685530] [2022-11-20 11:16:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:16:23,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:23,271 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:23,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 11:18:18,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 11:18:18,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:18:18,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-20 11:18:18,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:18:18,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968685530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:18,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:18,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 4] total 11 [2022-11-20 11:18:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627356864] [2022-11-20 11:18:18,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:18:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:18:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:18:18,550 INFO L87 Difference]: Start difference. First operand 148 states and 175 transitions. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:18:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:19,368 INFO L93 Difference]: Finished difference Result 265 states and 315 transitions. [2022-11-20 11:18:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:18:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 183 [2022-11-20 11:18:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:19,377 INFO L225 Difference]: With dead ends: 265 [2022-11-20 11:18:19,377 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 11:18:19,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:18:19,380 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 7 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:19,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 804 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:18:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 11:18:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-11-20 11:18:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.1319444444444444) internal successors, (163), 144 states have internal predecessors, (163), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:18:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2022-11-20 11:18:19,411 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 183 [2022-11-20 11:18:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:19,411 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2022-11-20 11:18:19,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:18:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2022-11-20 11:18:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-20 11:18:19,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:19,417 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:19,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-20 11:18:19,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:19,623 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1418749329, now seen corresponding path program 12 times [2022-11-20 11:18:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530499134] [2022-11-20 11:18:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:18:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:18:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:18:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-11-20 11:18:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-20 11:18:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-20 11:18:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-20 11:18:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-20 11:18:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-20 11:18:20,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:20,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530499134] [2022-11-20 11:18:20,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530499134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:20,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134265125] [2022-11-20 11:18:20,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:18:20,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:20,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:20,780 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:20,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 11:19:41,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:19:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:19:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-20 11:19:41,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-20 11:19:41,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134265125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:41,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:41,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 11 [2022-11-20 11:19:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169630189] [2022-11-20 11:19:41,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:41,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:19:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:19:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:19:41,265 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:19:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:41,422 INFO L93 Difference]: Finished difference Result 279 states and 327 transitions. [2022-11-20 11:19:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:19:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 191 [2022-11-20 11:19:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:41,425 INFO L225 Difference]: With dead ends: 279 [2022-11-20 11:19:41,425 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 11:19:41,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:19:41,426 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 6 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:41,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 626 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:19:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 11:19:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2022-11-20 11:19:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 148 states have internal predecessors, (167), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:19:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2022-11-20 11:19:41,453 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 191 [2022-11-20 11:19:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:41,454 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2022-11-20 11:19:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:19:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2022-11-20 11:19:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-20 11:19:41,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:41,456 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:41,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:41,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:41,671 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:41,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1918729173, now seen corresponding path program 13 times [2022-11-20 11:19:41,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:41,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071284627] [2022-11-20 11:19:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:19:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:19:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:19:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:19:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-20 11:19:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-20 11:19:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-20 11:19:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-11-20 11:19:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-11-20 11:19:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-20 11:19:42,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:42,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071284627] [2022-11-20 11:19:42,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071284627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:42,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86726032] [2022-11-20 11:19:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:19:42,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:42,930 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:42,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 11:19:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:19:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 112 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-20 11:19:45,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-20 11:19:45,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86726032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:45,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:45,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 15 [2022-11-20 11:19:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253587183] [2022-11-20 11:19:45,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:45,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:19:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:19:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:19:45,863 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:19:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:46,090 INFO L93 Difference]: Finished difference Result 284 states and 331 transitions. [2022-11-20 11:19:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:19:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 195 [2022-11-20 11:19:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:46,093 INFO L225 Difference]: With dead ends: 284 [2022-11-20 11:19:46,093 INFO L226 Difference]: Without dead ends: 164 [2022-11-20 11:19:46,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:19:46,094 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:46,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1008 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-20 11:19:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2022-11-20 11:19:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 150 states have internal predecessors, (169), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:19:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 189 transitions. [2022-11-20 11:19:46,119 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 189 transitions. Word has length 195 [2022-11-20 11:19:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:46,120 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 189 transitions. [2022-11-20 11:19:46,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:19:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 189 transitions. [2022-11-20 11:19:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-20 11:19:46,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:46,122 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:46,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 11:19:46,339 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1057827433, now seen corresponding path program 14 times [2022-11-20 11:19:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617923189] [2022-11-20 11:19:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:19:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:19:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:19:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:19:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-20 11:19:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-20 11:19:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-20 11:19:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-20 11:19:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-11-20 11:19:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-20 11:19:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617923189] [2022-11-20 11:19:47,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617923189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081149879] [2022-11-20 11:19:47,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:19:47,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:47,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:47,355 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:47,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 11:19:50,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:19:50,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:19:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 112 proven. 11 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-20 11:19:50,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-20 11:19:50,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081149879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:50,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:50,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:19:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673307522] [2022-11-20 11:19:50,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:19:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:19:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:19:50,729 INFO L87 Difference]: Start difference. First operand 162 states and 189 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:19:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:50,847 INFO L93 Difference]: Finished difference Result 290 states and 339 transitions. [2022-11-20 11:19:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:19:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 197 [2022-11-20 11:19:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:50,850 INFO L225 Difference]: With dead ends: 290 [2022-11-20 11:19:50,850 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 11:19:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:19:50,851 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:50,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 460 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:19:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 11:19:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-11-20 11:19:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 156 states have internal predecessors, (175), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:19:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2022-11-20 11:19:50,877 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 197 [2022-11-20 11:19:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:50,878 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2022-11-20 11:19:50,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:19:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2022-11-20 11:19:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-20 11:19:50,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:50,880 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:50,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:51,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:51,095 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 443029661, now seen corresponding path program 15 times [2022-11-20 11:19:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:51,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064870871] [2022-11-20 11:19:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:51,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:19:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:19:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:19:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:19:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-20 11:19:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-20 11:19:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-20 11:19:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-11-20 11:19:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-20 11:19:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-20 11:19:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064870871] [2022-11-20 11:19:52,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064870871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831638311] [2022-11-20 11:19:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:19:52,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:52,115 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:52,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 11:20:26,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:20:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:20:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-20 11:20:27,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-20 11:20:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831638311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:27,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:27,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:20:27,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823178001] [2022-11-20 11:20:27,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:27,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:20:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:20:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:27,066 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:20:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:27,193 INFO L93 Difference]: Finished difference Result 303 states and 352 transitions. [2022-11-20 11:20:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:20:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 203 [2022-11-20 11:20:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:27,195 INFO L225 Difference]: With dead ends: 303 [2022-11-20 11:20:27,196 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 11:20:27,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:27,197 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 6 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:27,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 549 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:20:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 11:20:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-11-20 11:20:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.117283950617284) internal successors, (181), 162 states have internal predecessors, (181), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:20:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2022-11-20 11:20:27,276 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 203 [2022-11-20 11:20:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:27,276 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2022-11-20 11:20:27,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:20:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2022-11-20 11:20:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-20 11:20:27,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:27,278 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:27,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:27,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:27,479 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -277870621, now seen corresponding path program 16 times [2022-11-20 11:20:27,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:27,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273349408] [2022-11-20 11:20:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:20:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:20:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:20:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:20:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:20:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-20 11:20:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-20 11:20:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-11-20 11:20:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-20 11:20:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-11-20 11:20:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-11-20 11:20:28,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:28,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273349408] [2022-11-20 11:20:28,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273349408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:28,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369255781] [2022-11-20 11:20:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:20:28,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:28,705 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:28,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 11:20:31,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:20:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:20:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-11-20 11:20:31,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-11-20 11:20:31,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369255781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:31,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:31,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-11-20 11:20:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449712981] [2022-11-20 11:20:31,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:31,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:20:31,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:20:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:31,822 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:20:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:31,954 INFO L93 Difference]: Finished difference Result 315 states and 364 transitions. [2022-11-20 11:20:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:20:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 209 [2022-11-20 11:20:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:31,957 INFO L225 Difference]: With dead ends: 315 [2022-11-20 11:20:31,957 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 11:20:31,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:31,959 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 5 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:31,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 549 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:20:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 11:20:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-11-20 11:20:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 168 states have (on average 1.1130952380952381) internal successors, (187), 168 states have internal predecessors, (187), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:20:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-11-20 11:20:32,001 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 209 [2022-11-20 11:20:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:32,001 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-11-20 11:20:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 11:20:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-11-20 11:20:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-20 11:20:32,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:32,004 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:32,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:20:32,230 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:32,230 INFO L85 PathProgramCache]: Analyzing trace with hash 847958889, now seen corresponding path program 17 times [2022-11-20 11:20:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:32,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409218403] [2022-11-20 11:20:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:20:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:20:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:20:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:20:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:20:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-20 11:20:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-11-20 11:20:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-20 11:20:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-11-20 11:20:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-11-20 11:20:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-11-20 11:20:33,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:33,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409218403] [2022-11-20 11:20:33,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409218403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:33,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724053793] [2022-11-20 11:20:33,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:20:33,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:33,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:33,575 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:33,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe9f365-4859-44e2-ba30-4a0a1cc53330/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process