./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:28:50,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:28:50,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:28:50,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:28:50,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:28:50,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:28:50,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:28:50,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:28:50,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:28:50,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:28:50,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:28:50,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:28:50,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:28:50,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:28:50,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:28:50,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:28:50,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:28:50,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:28:50,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:28:50,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:28:50,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:28:50,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:28:50,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:28:50,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:28:50,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:28:50,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:28:50,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:28:50,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:28:50,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:28:50,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:28:50,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:28:50,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:28:50,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:28:50,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:28:50,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:28:50,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:28:50,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:28:50,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:28:50,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:28:50,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:28:50,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:28:50,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:28:50,654 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:28:50,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:28:50,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:28:50,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:28:50,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:28:50,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:28:50,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:28:50,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:28:50,658 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:28:50,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:28:50,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:28:50,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:28:50,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:28:50,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:28:50,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:28:50,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:28:50,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:28:50,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:28:50,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:28:50,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:28:50,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:28:50,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:28:50,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:28:50,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:28:50,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:50,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:28:50,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:28:50,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:28:50,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:28:50,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:28:50,666 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:28:50,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:28:50,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:28:50,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2022-11-20 09:28:50,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:28:50,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:28:50,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:28:50,988 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:28:50,989 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:28:50,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-acceleration/array_3-2.i [2022-11-20 09:28:54,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:28:54,389 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:28:54,391 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/sv-benchmarks/c/loop-acceleration/array_3-2.i [2022-11-20 09:28:54,398 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/data/415dc6659/4df51ffa704f41adbf1dde6f541ab67a/FLAG5108cc28f [2022-11-20 09:28:54,418 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/data/415dc6659/4df51ffa704f41adbf1dde6f541ab67a [2022-11-20 09:28:54,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:28:54,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:28:54,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:54,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:28:54,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:28:54,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e7262e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54, skipping insertion in model container [2022-11-20 09:28:54,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:28:54,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:28:54,600 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_da2c43b0-e033-47b2-81c7-5adda034577d/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2022-11-20 09:28:54,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:54,621 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:28:54,633 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_da2c43b0-e033-47b2-81c7-5adda034577d/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2022-11-20 09:28:54,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:54,650 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:28:54,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54 WrapperNode [2022-11-20 09:28:54,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:54,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:54,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:28:54,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:28:54,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,684 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-20 09:28:54,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:54,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:28:54,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:28:54,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:28:54,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:28:54,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:28:54,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:28:54,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:28:54,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (1/1) ... [2022-11-20 09:28:54,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:54,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:28:54,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:28:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:28:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:28:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:28:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:28:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:28:54,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:28:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:28:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:28:54,873 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:28:54,876 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:28:55,036 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:28:55,042 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:28:55,042 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:28:55,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:55 BoogieIcfgContainer [2022-11-20 09:28:55,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:28:55,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:28:55,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:28:55,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:28:55,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:28:54" (1/3) ... [2022-11-20 09:28:55,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b883c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:55, skipping insertion in model container [2022-11-20 09:28:55,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:54" (2/3) ... [2022-11-20 09:28:55,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b883c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:55, skipping insertion in model container [2022-11-20 09:28:55,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:55" (3/3) ... [2022-11-20 09:28:55,054 INFO L112 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2022-11-20 09:28:55,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:28:55,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:28:55,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:55,139 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;@20a69ec6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:55,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:28:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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) [2022-11-20 09:28:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:28:55,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:55,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:55,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 212441967, now seen corresponding path program 1 times [2022-11-20 09:28:55,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:55,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533574539] [2022-11-20 09:28:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:55,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533574539] [2022-11-20 09:28:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533574539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:55,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:55,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542429203] [2022-11-20 09:28:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:55,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:55,496 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-20 09:28:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:55,552 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2022-11-20 09:28:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 [2022-11-20 09:28:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:55,569 INFO L225 Difference]: With dead ends: 44 [2022-11-20 09:28:55,569 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 09:28:55,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:55,576 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:55,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:28:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 09:28:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2022-11-20 09:28:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-11-20 09:28:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-20 09:28:55,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-20 09:28:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:55,607 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-20 09:28:55,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-20 09:28:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-20 09:28:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:28:55,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:55,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:28:55,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1195372026, now seen corresponding path program 1 times [2022-11-20 09:28:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:55,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473352709] [2022-11-20 09:28:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:55,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:55,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473352709] [2022-11-20 09:28:55,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473352709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505556960] [2022-11-20 09:28:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:55,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:55,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:55,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:28:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:28:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:55,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:55,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505556960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:55,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:55,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 09:28:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344411534] [2022-11-20 09:28:55,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:55,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:28:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:28:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:55,883 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-20 09:28:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:56,008 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-11-20 09:28:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:28:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 12 [2022-11-20 09:28:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:56,010 INFO L225 Difference]: With dead ends: 61 [2022-11-20 09:28:56,011 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 09:28:56,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:56,014 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:56,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 09:28:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2022-11-20 09:28:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-11-20 09:28:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-20 09:28:56,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-11-20 09:28:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:56,027 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-20 09:28:56,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-20 09:28:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-20 09:28:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 09:28:56,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:56,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:56,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:56,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:56,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash -328971648, now seen corresponding path program 2 times [2022-11-20 09:28:56,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:56,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849204736] [2022-11-20 09:28:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:28:56,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849204736] [2022-11-20 09:28:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849204736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:56,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:56,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:28:56,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115784861] [2022-11-20 09:28:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:56,506 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-20 09:28:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:56,574 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-20 09:28:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:56,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2022-11-20 09:28:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:56,579 INFO L225 Difference]: With dead ends: 28 [2022-11-20 09:28:56,579 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 09:28:56,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:56,583 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:56,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:28:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 09:28:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-20 09:28:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-11-20 09:28:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-20 09:28:56,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-11-20 09:28:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:56,590 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-20 09:28:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-20 09:28:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-20 09:28:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:28:56,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:56,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:28:56,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 222661349, now seen corresponding path program 1 times [2022-11-20 09:28:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:56,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805397452] [2022-11-20 09:28:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:28:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805397452] [2022-11-20 09:28:56,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805397452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:56,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318526821] [2022-11-20 09:28:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:56,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:56,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:28:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:56,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:28:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:28:56,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:28:57,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318526821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:57,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:57,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2022-11-20 09:28:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456406696] [2022-11-20 09:28:57,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:28:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:28:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:28:57,065 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2022-11-20 09:28:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:57,315 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2022-11-20 09:28:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 09:28:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 22 [2022-11-20 09:28:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:57,319 INFO L225 Difference]: With dead ends: 112 [2022-11-20 09:28:57,319 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 09:28:57,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:57,327 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 148 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:57,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 68 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 09:28:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2022-11-20 09:28:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-11-20 09:28:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-11-20 09:28:57,336 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2022-11-20 09:28:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:57,336 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-11-20 09:28:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2022-11-20 09:28:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-11-20 09:28:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 09:28:57,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:57,338 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:57,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:57,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1174972677, now seen corresponding path program 2 times [2022-11-20 09:28:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392070884] [2022-11-20 09:28:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 09:28:57,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:57,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392070884] [2022-11-20 09:28:57,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392070884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:57,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072634625] [2022-11-20 09:28:57,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:57,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:58,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:28:58,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:28:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 09:28:58,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 09:28:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072634625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:58,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:58,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-20 09:28:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111544373] [2022-11-20 09:28:58,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:58,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:28:58,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:28:58,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:28:58,510 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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) [2022-11-20 09:28:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:58,898 INFO L93 Difference]: Finished difference Result 240 states and 282 transitions. [2022-11-20 09:28:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:28:58,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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 [2022-11-20 09:28:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:58,907 INFO L225 Difference]: With dead ends: 240 [2022-11-20 09:28:58,907 INFO L226 Difference]: Without dead ends: 212 [2022-11-20 09:28:58,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:28:58,909 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 557 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:58,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 113 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:28:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-20 09:28:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 75. [2022-11-20 09:28:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 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) [2022-11-20 09:28:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-11-20 09:28:58,939 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 50 [2022-11-20 09:28:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:58,940 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-11-20 09:28:58,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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) [2022-11-20 09:28:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-11-20 09:28:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 09:28:58,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:58,945 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:58,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:59,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:59,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1782423069, now seen corresponding path program 3 times [2022-11-20 09:28:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747038439] [2022-11-20 09:28:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 09:28:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:59,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747038439] [2022-11-20 09:28:59,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747038439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:59,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156556627] [2022-11-20 09:28:59,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:59,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:59,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:59,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:29:00,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 09:29:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:00,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:29:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-20 09:29:00,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-20 09:29:00,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156556627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:00,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:00,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 34 [2022-11-20 09:29:00,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738029357] [2022-11-20 09:29:00,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:29:00,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:29:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:29:00,412 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 34 states have internal predecessors, (112), 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) [2022-11-20 09:29:01,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:01,345 INFO L93 Difference]: Finished difference Result 263 states and 331 transitions. [2022-11-20 09:29:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 09:29:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 34 states have internal predecessors, (112), 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 74 [2022-11-20 09:29:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:01,347 INFO L225 Difference]: With dead ends: 263 [2022-11-20 09:29:01,348 INFO L226 Difference]: Without dead ends: 187 [2022-11-20 09:29:01,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1173, Invalid=2133, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 09:29:01,350 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 567 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:01,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 114 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:29:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-20 09:29:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-11-20 09:29:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 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) [2022-11-20 09:29:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 216 transitions. [2022-11-20 09:29:01,378 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 216 transitions. Word has length 74 [2022-11-20 09:29:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:01,380 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 216 transitions. [2022-11-20 09:29:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 34 states have internal predecessors, (112), 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) [2022-11-20 09:29:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 216 transitions. [2022-11-20 09:29:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-20 09:29:01,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:01,387 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:01,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:01,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:01,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1491474595, now seen corresponding path program 4 times [2022-11-20 09:29:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:01,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23107537] [2022-11-20 09:29:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:29:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23107537] [2022-11-20 09:29:03,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23107537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138143878] [2022-11-20 09:29:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:29:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:03,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:29:03,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:29:03,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 09:29:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:29:03,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:29:04,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138143878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:04,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:04,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2022-11-20 09:29:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946915193] [2022-11-20 09:29:04,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 09:29:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 09:29:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 09:29:04,852 INFO L87 Difference]: Start difference. First operand 185 states and 216 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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) [2022-11-20 09:29:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:05,928 INFO L93 Difference]: Finished difference Result 620 states and 743 transitions. [2022-11-20 09:29:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 09:29:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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 184 [2022-11-20 09:29:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:05,932 INFO L225 Difference]: With dead ends: 620 [2022-11-20 09:29:05,932 INFO L226 Difference]: Without dead ends: 496 [2022-11-20 09:29:05,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 09:29:05,939 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1322 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:05,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 247 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 09:29:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-20 09:29:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 247. [2022-11-20 09:29:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.1300813008130082) internal successors, (278), 246 states have internal predecessors, (278), 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) [2022-11-20 09:29:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2022-11-20 09:29:05,971 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 184 [2022-11-20 09:29:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:05,973 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2022-11-20 09:29:05,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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) [2022-11-20 09:29:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2022-11-20 09:29:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-20 09:29:05,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:05,982 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:05,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:06,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:06,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1053396639, now seen corresponding path program 5 times [2022-11-20 09:29:06,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:06,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112480324] [2022-11-20 09:29:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:06,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:29:10,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112480324] [2022-11-20 09:29:10,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112480324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848247689] [2022-11-20 09:29:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:29:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:10,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:10,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:31:37,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2022-11-20 09:31:37,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:38,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 09:31:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:31:38,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:31:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848247689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:43,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:43,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 125 [2022-11-20 09:31:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331695208] [2022-11-20 09:31:43,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:43,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-11-20 09:31:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-11-20 09:31:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 09:31:43,633 INFO L87 Difference]: Start difference. First operand 247 states and 278 transitions. Second operand has 125 states, 125 states have (on average 2.056) internal successors, (257), 125 states have internal predecessors, (257), 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) [2022-11-20 09:31:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:49,230 INFO L93 Difference]: Finished difference Result 1240 states and 1456 transitions. [2022-11-20 09:31:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-20 09:31:49,231 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.056) internal successors, (257), 125 states have internal predecessors, (257), 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 246 [2022-11-20 09:31:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:49,235 INFO L225 Difference]: With dead ends: 1240 [2022-11-20 09:31:49,235 INFO L226 Difference]: Without dead ends: 1116 [2022-11-20 09:31:49,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 09:31:49,240 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3775 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3775 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:49,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3775 Valid, 557 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:31:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-11-20 09:31:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 371. [2022-11-20 09:31:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.0864864864864865) internal successors, (402), 370 states have internal predecessors, (402), 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) [2022-11-20 09:31:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 402 transitions. [2022-11-20 09:31:49,256 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 402 transitions. Word has length 246 [2022-11-20 09:31:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:49,257 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 402 transitions. [2022-11-20 09:31:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.056) internal successors, (257), 125 states have internal predecessors, (257), 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) [2022-11-20 09:31:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 402 transitions. [2022-11-20 09:31:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-11-20 09:31:49,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:49,264 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:49,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:49,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash -416450211, now seen corresponding path program 6 times [2022-11-20 09:31:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:49,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541412850] [2022-11-20 09:31:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-20 09:32:01,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541412850] [2022-11-20 09:32:01,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541412850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706906627] [2022-11-20 09:32:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:32:01,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:01,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:01,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:01,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:41:11,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2022-11-20 09:41:11,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 09:41:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 14884 trivial. 0 not checked. [2022-11-20 09:41:12,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 14884 trivial. 0 not checked. [2022-11-20 09:41:16,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706906627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:16,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:41:16,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 33, 33] total 158 [2022-11-20 09:41:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538489603] [2022-11-20 09:41:16,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-11-20 09:41:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:41:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-11-20 09:41:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12095, Invalid=12711, Unknown=0, NotChecked=0, Total=24806 [2022-11-20 09:41:16,292 INFO L87 Difference]: Start difference. First operand 371 states and 402 transitions. Second operand has 158 states, 158 states have (on average 3.189873417721519) internal successors, (504), 158 states have internal predecessors, (504), 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) [2022-11-20 09:41:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:36,454 INFO L93 Difference]: Finished difference Result 1303 states and 1643 transitions. [2022-11-20 09:41:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2022-11-20 09:41:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.189873417721519) internal successors, (504), 158 states have internal predecessors, (504), 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 370 [2022-11-20 09:41:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:36,461 INFO L225 Difference]: With dead ends: 1303 [2022-11-20 09:41:36,461 INFO L226 Difference]: Without dead ends: 931 [2022-11-20 09:41:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8736 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=27967, Invalid=51275, Unknown=0, NotChecked=0, Total=79242 [2022-11-20 09:41:36,472 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3511 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:36,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3511 Valid, 483 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1082 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 09:41:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-20 09:41:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2022-11-20 09:41:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.168103448275862) internal successors, (1084), 928 states have internal predecessors, (1084), 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) [2022-11-20 09:41:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1084 transitions. [2022-11-20 09:41:36,497 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1084 transitions. Word has length 370 [2022-11-20 09:41:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:36,498 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1084 transitions. [2022-11-20 09:41:36,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.189873417721519) internal successors, (504), 158 states have internal predecessors, (504), 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) [2022-11-20 09:41:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1084 transitions. [2022-11-20 09:41:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2022-11-20 09:41:36,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:36,531 INFO L195 NwaCegarLoop]: trace histogram [154, 154, 153, 153, 153, 153, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:36,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:41:36,753 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1554692473, now seen corresponding path program 7 times [2022-11-20 09:41:36,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:41:36,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696472792] [2022-11-20 09:41:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:36,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:41:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:42:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 70380 backedges. 0 proven. 23409 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-11-20 09:42:01,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:42:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696472792] [2022-11-20 09:42:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696472792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:42:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035737364] [2022-11-20 09:42:01,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:42:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:42:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:42:01,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:42:01,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da2c43b0-e033-47b2-81c7-5adda034577d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:42:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:42:02,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-20 09:42:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 70380 backedges. 0 proven. 23409 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-11-20 09:42:03,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 70380 backedges. 0 proven. 23409 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-11-20 09:42:37,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035737364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:37,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:42:37,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156, 156] total 311 [2022-11-20 09:42:37,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851388789] [2022-11-20 09:42:37,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:37,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2022-11-20 09:42:37,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:42:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2022-11-20 09:42:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48205, Invalid=48205, Unknown=0, NotChecked=0, Total=96410 [2022-11-20 09:42:37,255 INFO L87 Difference]: Start difference. First operand 929 states and 1084 transitions. Second operand has 311 states, 311 states have (on average 2.022508038585209) internal successors, (629), 311 states have internal predecessors, (629), 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)