./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:35:58,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:35:58,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:35:58,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:35:58,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:35:58,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:35:58,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:35:58,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:35:58,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:35:58,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:35:58,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:35:58,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:35:58,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:35:58,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:35:58,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:35:58,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:35:58,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:35:58,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:35:58,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:35:58,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:35:58,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:35:58,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:35:58,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:35:58,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:35:58,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:35:58,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:35:58,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:35:58,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:35:58,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:35:58,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:35:58,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:35:58,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:35:58,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:35:58,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:35:58,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:35:58,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:35:58,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:35:58,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:35:58,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:35:58,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:35:58,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:35:58,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:35:58,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:35:58,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:35:58,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:35:58,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:35:58,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:35:58,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:35:58,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:35:58,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:35:58,499 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:35:58,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:35:58,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:35:58,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:35:58,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:35:58,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:35:58,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:35:58,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:35:58,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:35:58,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:35:58,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:35:58,502 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:35:58,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:35:58,502 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:35:58,502 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2022-12-13 13:35:58,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:35:58,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:35:58,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:35:58,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:35:58,707 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:35:58,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loop-new/count_by_2.i [2022-12-13 13:36:01,248 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:36:01,406 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:36:01,407 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/sv-benchmarks/c/loop-new/count_by_2.i [2022-12-13 13:36:01,412 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/data/8fe75a31c/65e5a95938a24bf0bb2735fa3917d795/FLAGc716fcc2b [2022-12-13 13:36:01,424 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/data/8fe75a31c/65e5a95938a24bf0bb2735fa3917d795 [2022-12-13 13:36:01,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:36:01,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:36:01,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:36:01,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:36:01,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:36:01,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16cb37ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01, skipping insertion in model container [2022-12-13 13:36:01,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:36:01,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:36:01,591 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_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2022-12-13 13:36:01,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:36:01,609 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:36:01,622 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_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2022-12-13 13:36:01,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:36:01,637 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:36:01,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01 WrapperNode [2022-12-13 13:36:01,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:36:01,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:36:01,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:36:01,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:36:01,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,667 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2022-12-13 13:36:01,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:36:01,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:36:01,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:36:01,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:36:01,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:36:01,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:36:01,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:36:01,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:36:01,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (1/1) ... [2022-12-13 13:36:01,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:36:01,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:01,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:36:01,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:36:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:36:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:36:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:36:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:36:01,812 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:36:01,813 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:36:01,875 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:36:01,881 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:36:01,881 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 13:36:01,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:36:01 BoogieIcfgContainer [2022-12-13 13:36:01,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:36:01,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:36:01,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:36:01,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:36:01,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:36:01" (1/3) ... [2022-12-13 13:36:01,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3142b79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:36:01, skipping insertion in model container [2022-12-13 13:36:01,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:36:01" (2/3) ... [2022-12-13 13:36:01,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3142b79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:36:01, skipping insertion in model container [2022-12-13 13:36:01,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:36:01" (3/3) ... [2022-12-13 13:36:01,892 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2022-12-13 13:36:01,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:36:01,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:36:01,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:36:01,963 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;@36590f4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:36:01,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:36:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:36:01,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:01,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:36:01,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-12-13 13:36:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973560321] [2022-12-13 13:36:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973560321] [2022-12-13 13:36:02,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973560321] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:02,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:36:02,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:36:02,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222153381] [2022-12-13 13:36:02,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:02,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:36:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:36:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:36:02,193 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:02,217 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-12-13 13:36:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:36:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:36:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:02,227 INFO L225 Difference]: With dead ends: 22 [2022-12-13 13:36:02,228 INFO L226 Difference]: Without dead ends: 10 [2022-12-13 13:36:02,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:36:02,234 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:02,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:36:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-13 13:36:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-12-13 13:36:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-12-13 13:36:02,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-12-13 13:36:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:02,268 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-12-13 13:36:02,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-12-13 13:36:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:36:02,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:02,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:02,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:36:02,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-12-13 13:36:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:02,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029278472] [2022-12-13 13:36:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:02,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029278472] [2022-12-13 13:36:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029278472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876779993] [2022-12-13 13:36:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:02,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:02,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:02,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:36:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:36:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876779993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:02,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:02,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 13:36:02,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11262358] [2022-12-13 13:36:02,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:02,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:36:02,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:36:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:36:02,432 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:02,457 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-13 13:36:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:36:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 13:36:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:02,459 INFO L225 Difference]: With dead ends: 19 [2022-12-13 13:36:02,459 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 13:36:02,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:36:02,468 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:02,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:36:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 13:36:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 13:36:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-12-13 13:36:02,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-12-13 13:36:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:02,472 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-12-13 13:36:02,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-12-13 13:36:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 13:36:02,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:02,473 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:02,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:36:02,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:02,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2022-12-13 13:36:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643774926] [2022-12-13 13:36:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:02,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:02,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643774926] [2022-12-13 13:36:02,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643774926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:02,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343515027] [2022-12-13 13:36:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:36:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:02,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:02,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:36:02,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:36:02,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:36:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:36:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343515027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:02,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:02,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 13:36:02,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214764186] [2022-12-13 13:36:02,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:36:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:36:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:36:02,997 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:03,031 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-12-13 13:36:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:36:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 13:36:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:03,032 INFO L225 Difference]: With dead ends: 31 [2022-12-13 13:36:03,032 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 13:36:03,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:36:03,033 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:03,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:36:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 13:36:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-13 13:36:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-12-13 13:36:03,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-12-13 13:36:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:03,037 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-12-13 13:36:03,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-12-13 13:36:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 13:36:03,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:03,038 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:03,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:36:03,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 13:36:03,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:03,241 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2022-12-13 13:36:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:03,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875522486] [2022-12-13 13:36:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:03,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:03,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:03,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875522486] [2022-12-13 13:36:03,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875522486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:03,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666158575] [2022-12-13 13:36:03,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:36:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:03,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:03,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:36:03,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 13:36:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:36:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:36:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:03,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:03,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666158575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:03,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:03,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 13:36:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5759498] [2022-12-13 13:36:03,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:03,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 13:36:03,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 13:36:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:36:03,766 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:03,823 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-12-13 13:36:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:36:03,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-13 13:36:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:03,824 INFO L225 Difference]: With dead ends: 55 [2022-12-13 13:36:03,824 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 13:36:03,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:36:03,826 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:03,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:36:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 13:36:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-13 13:36:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-12-13 13:36:03,833 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-12-13 13:36:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:03,833 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-12-13 13:36:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-12-13 13:36:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 13:36:03,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:03,835 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:03,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:36:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:04,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2022-12-13 13:36:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:04,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138234360] [2022-12-13 13:36:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:04,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138234360] [2022-12-13 13:36:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138234360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736362915] [2022-12-13 13:36:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:36:04,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:04,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:04,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:04,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:36:04,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:36:04,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:36:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:36:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:04,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:05,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736362915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:05,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:05,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-13 13:36:05,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817306159] [2022-12-13 13:36:05,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:05,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 13:36:05,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 13:36:05,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 13:36:05,108 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:05,235 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-12-13 13:36:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 13:36:05,236 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-13 13:36:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:05,237 INFO L225 Difference]: With dead ends: 103 [2022-12-13 13:36:05,237 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 13:36:05,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 13:36:05,239 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:05,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:36:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 13:36:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-13 13:36:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-12-13 13:36:05,249 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-12-13 13:36:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:05,250 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-12-13 13:36:05,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-12-13 13:36:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-13 13:36:05,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:05,252 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:05,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:36:05,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:05,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2022-12-13 13:36:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:05,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698158642] [2022-12-13 13:36:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:05,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:06,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698158642] [2022-12-13 13:36:06,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698158642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051410083] [2022-12-13 13:36:06,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:36:06,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:06,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:36:06,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-12-13 13:36:06,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:36:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 13:36:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:06,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:08,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051410083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:08,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:08,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-13 13:36:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574776719] [2022-12-13 13:36:08,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:08,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 13:36:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 13:36:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 13:36:08,756 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:09,048 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-12-13 13:36:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 13:36:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-13 13:36:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:09,050 INFO L225 Difference]: With dead ends: 199 [2022-12-13 13:36:09,050 INFO L226 Difference]: Without dead ends: 195 [2022-12-13 13:36:09,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 13:36:09,052 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:09,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:36:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-13 13:36:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-13 13:36:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-12-13 13:36:09,062 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-12-13 13:36:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:09,063 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-12-13 13:36:09,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-12-13 13:36:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-13 13:36:09,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:09,065 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:09,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:36:09,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 13:36:09,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:09,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2022-12-13 13:36:09,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:09,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969197043] [2022-12-13 13:36:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:09,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:12,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:12,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969197043] [2022-12-13 13:36:12,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969197043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:12,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720569394] [2022-12-13 13:36:12,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:36:12,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:12,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:12,700 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:12,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:36:12,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-12-13 13:36:12,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:36:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 13:36:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:19,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720569394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:19,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:19,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-12-13 13:36:19,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220065278] [2022-12-13 13:36:19,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:19,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-13 13:36:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-13 13:36:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-12-13 13:36:19,468 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:20,073 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2022-12-13 13:36:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-13 13:36:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-12-13 13:36:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:20,075 INFO L225 Difference]: With dead ends: 391 [2022-12-13 13:36:20,075 INFO L226 Difference]: Without dead ends: 387 [2022-12-13 13:36:20,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-12-13 13:36:20,078 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:20,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:36:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-12-13 13:36:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-12-13 13:36:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-12-13 13:36:20,091 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-12-13 13:36:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:20,092 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-12-13 13:36:20,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-12-13 13:36:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-13 13:36:20,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:20,096 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:20,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:36:20,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:20,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:36:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1658733399, now seen corresponding path program 7 times [2022-12-13 13:36:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:36:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634043707] [2022-12-13 13:36:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:36:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:32,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:36:32,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634043707] [2022-12-13 13:36:32,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634043707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:32,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912705153] [2022-12-13 13:36:32,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:36:32,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:36:32,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:36:32,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:36:32,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:36:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:32,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-13 13:36:32,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:33,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:58,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912705153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:36:58,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:36:58,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-12-13 13:36:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140065757] [2022-12-13 13:36:58,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:36:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-13 13:36:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:36:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-13 13:36:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-12-13 13:36:58,513 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:37:01,860 INFO L93 Difference]: Finished difference Result 775 states and 966 transitions. [2022-12-13 13:37:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-13 13:37:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2022-12-13 13:37:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:37:01,863 INFO L225 Difference]: With dead ends: 775 [2022-12-13 13:37:01,863 INFO L226 Difference]: Without dead ends: 771 [2022-12-13 13:37:01,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-12-13 13:37:01,869 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:37:01,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:37:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-12-13 13:37:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-12-13 13:37:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-12-13 13:37:01,886 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-12-13 13:37:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:37:01,887 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-12-13 13:37:01,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-12-13 13:37:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-12-13 13:37:01,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:37:01,902 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-12-13 13:37:01,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:37:02,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:37:02,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:37:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:37:02,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1786531369, now seen corresponding path program 8 times [2022-12-13 13:37:02,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:37:02,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131157533] [2022-12-13 13:37:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:37:02,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:37:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:04,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:04,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131157533] [2022-12-13 13:38:04,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131157533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745394627] [2022-12-13 13:38:04,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:38:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:04,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:04,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:38:04,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:38:04,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:38:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 384 conjunts are in the unsatisfiable core [2022-12-13 13:38:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:05,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:39:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:39:51,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745394627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:39:51,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:39:51,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2022-12-13 13:39:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530941676] [2022-12-13 13:39:51,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:39:51,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-12-13 13:39:51,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:39:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-12-13 13:39:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2022-12-13 13:39:51,553 INFO L87 Difference]: Start difference. First operand 771 states and 771 transitions. Second operand has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:40:10,963 INFO L93 Difference]: Finished difference Result 1543 states and 1926 transitions. [2022-12-13 13:40:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-12-13 13:40:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 770 [2022-12-13 13:40:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:40:10,968 INFO L225 Difference]: With dead ends: 1543 [2022-12-13 13:40:10,968 INFO L226 Difference]: Without dead ends: 1539 [2022-12-13 13:40:10,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1923 GetRequests, 1156 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 139.5s TimeCoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2022-12-13 13:40:10,995 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:40:10,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 13:40:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-12-13 13:40:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1539. [2022-12-13 13:40:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.0006501950585176) internal successors, (1539), 1538 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1539 transitions. [2022-12-13 13:40:11,022 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1539 transitions. Word has length 770 [2022-12-13 13:40:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:40:11,023 INFO L495 AbstractCegarLoop]: Abstraction has 1539 states and 1539 transitions. [2022-12-13 13:40:11,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1539 transitions. [2022-12-13 13:40:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1539 [2022-12-13 13:40:11,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:40:11,035 INFO L195 NwaCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1] [2022-12-13 13:40:11,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:40:11,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:40:11,237 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:40:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:40:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1780911831, now seen corresponding path program 9 times [2022-12-13 13:40:11,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:40:11,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321281228] [2022-12-13 13:40:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:40:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:40:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:46:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:46:13,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:46:13,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321281228] [2022-12-13 13:46:13,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321281228] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:46:13,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651130644] [2022-12-13 13:46:13,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:46:13,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:46:13,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:46:13,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:46:13,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e6a271-31d5-4d20-aa98-30a6c1f3ab96/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:46:19,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 767 check-sat command(s) [2022-12-13 13:46:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:46:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2329 conjuncts, 768 conjunts are in the unsatisfiable core [2022-12-13 13:46:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:46:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:46:20,914 INFO L328 TraceCheckSpWp]: Computing backward predicates...