./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 12:40:57,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:40:57,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:40:57,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:40:57,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:40:57,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:40:57,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:40:57,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:40:57,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:40:57,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:40:57,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:40:57,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:40:57,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:40:57,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:40:57,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:40:57,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:40:57,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:40:57,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:40:57,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:40:57,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:40:57,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:40:57,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:40:57,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:40:57,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:40:57,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:40:57,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:40:57,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:40:57,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:40:57,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:40:57,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:40:57,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:40:57,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:40:57,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:40:57,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:40:57,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:40:57,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:40:57,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:40:57,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:40:57,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:40:57,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:40:57,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:40:57,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:40:57,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:40:57,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:40:57,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:40:57,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:40:57,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:40:57,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:40:57,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:40:57,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:40:57,615 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:40:57,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:40:57,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:40:57,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:40:57,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:40:57,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:40:57,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:40:57,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:40:57,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:40:57,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:40:57,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:40:57,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:40:57,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:40:57,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:40:57,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:40:57,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:40:57,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:40:57,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:40:57,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:40:57,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:40:57,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:40:57,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:40:57,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:40:57,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:40:57,620 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:40:57,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:40:57,620 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:40:57,620 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 [2022-12-13 12:40:57,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:40:57,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:40:57,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:40:57,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:40:57,839 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:40:57,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2022-12-13 12:41:00,424 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:41:00,579 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:41:00,579 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2022-12-13 12:41:00,583 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/data/f7459c115/a8768ed1d7c949e398c34a7409fef229/FLAG5b25bd936 [2022-12-13 12:41:00,995 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/data/f7459c115/a8768ed1d7c949e398c34a7409fef229 [2022-12-13 12:41:00,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:41:00,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:41:00,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:41:00,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:41:01,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:41:01,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:41:00" (1/1) ... [2022-12-13 12:41:01,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d75ce85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01, skipping insertion in model container [2022-12-13 12:41:01,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:41:00" (1/1) ... [2022-12-13 12:41:01,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:41:01,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:41:01,121 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2022-12-13 12:41:01,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:41:01,139 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:41:01,148 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_72132666-cd95-47d5-9445-b1106f9eb3b5/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2022-12-13 12:41:01,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:41:01,162 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:41:01,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01 WrapperNode [2022-12-13 12:41:01,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:41:01,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:41:01,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:41:01,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:41:01,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,191 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-12-13 12:41:01,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:41:01,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:41:01,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:41:01,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:41:01,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:41:01,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:41:01,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:41:01,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:41:01,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (1/1) ... [2022-12-13 12:41:01,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:41:01,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:01,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:41:01,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:41:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:41:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:41:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:41:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:41:01,319 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:41:01,321 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:41:01,397 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:41:01,401 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:41:01,401 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 12:41:01,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:41:01 BoogieIcfgContainer [2022-12-13 12:41:01,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:41:01,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:41:01,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:41:01,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:41:01,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:41:00" (1/3) ... [2022-12-13 12:41:01,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b21ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:41:01, skipping insertion in model container [2022-12-13 12:41:01,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:41:01" (2/3) ... [2022-12-13 12:41:01,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b21ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:41:01, skipping insertion in model container [2022-12-13 12:41:01,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:41:01" (3/3) ... [2022-12-13 12:41:01,409 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-12-13 12:41:01,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:41:01,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:41:01,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:41:01,462 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;@70b98a1b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:41:01,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 12:41:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 12:41:01,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:01,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:01,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1270421808, now seen corresponding path program 1 times [2022-12-13 12:41:01,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:01,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783642732] [2022-12-13 12:41:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:01,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:01,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:01,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783642732] [2022-12-13 12:41:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783642732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:41:01,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:41:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:41:01,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615410373] [2022-12-13 12:41:01,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:41:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 12:41:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 12:41:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:41:01,615 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:01,629 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-13 12:41:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 12:41:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 12:41:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:01,637 INFO L225 Difference]: With dead ends: 29 [2022-12-13 12:41:01,637 INFO L226 Difference]: Without dead ends: 12 [2022-12-13 12:41:01,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:41:01,644 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:01,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:41:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-13 12:41:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-13 12:41:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-13 12:41:01,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-12-13 12:41:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:01,672 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-13 12:41:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-13 12:41:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 12:41:01,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:01,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:01,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:41:01,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1947968043, now seen corresponding path program 1 times [2022-12-13 12:41:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298478698] [2022-12-13 12:41:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:01,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298478698] [2022-12-13 12:41:01,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298478698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:41:01,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:41:01,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:41:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732208970] [2022-12-13 12:41:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:41:01,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:41:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:41:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:41:01,829 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:01,864 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-12-13 12:41:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:41:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-12-13 12:41:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:01,865 INFO L225 Difference]: With dead ends: 21 [2022-12-13 12:41:01,865 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 12:41:01,866 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 [2022-12-13 12:41:01,866 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:01,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:41:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 12:41:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2022-12-13 12:41:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-12-13 12:41:01,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-12-13 12:41:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:01,871 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-12-13 12:41:01,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-12-13 12:41:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 12:41:01,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:01,872 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:01,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:41:01,873 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:01,873 INFO L85 PathProgramCache]: Analyzing trace with hash 653313584, now seen corresponding path program 1 times [2022-12-13 12:41:01,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:01,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774685834] [2022-12-13 12:41:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774685834] [2022-12-13 12:41:01,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774685834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492217854] [2022-12-13 12:41:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:01,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:41:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:41:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:02,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:02,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492217854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:02,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:02,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 12:41:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206356093] [2022-12-13 12:41:02,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:02,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:41:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:41:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:41:02,120 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:02,191 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-12-13 12:41:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:41:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 13 [2022-12-13 12:41:02,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:02,192 INFO L225 Difference]: With dead ends: 44 [2022-12-13 12:41:02,192 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 12:41:02,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:41:02,194 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:02,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:41:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 12:41:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-12-13 12:41:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-13 12:41:02,201 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2022-12-13 12:41:02,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:02,202 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-13 12:41:02,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-13 12:41:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 12:41:02,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:02,203 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:02,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:41:02,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:02,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1676362047, now seen corresponding path program 2 times [2022-12-13 12:41:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:02,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414002502] [2022-12-13 12:41:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:02,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:02,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414002502] [2022-12-13 12:41:02,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414002502] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302312807] [2022-12-13 12:41:02,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:41:02,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:02,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:02,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:41:02,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:41:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:41:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:02,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:02,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302312807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:02,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:02,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-13 12:41:02,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798537831] [2022-12-13 12:41:02,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:41:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:41:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:41:02,778 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:02,908 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-12-13 12:41:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:41:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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 19 [2022-12-13 12:41:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:02,911 INFO L225 Difference]: With dead ends: 88 [2022-12-13 12:41:02,911 INFO L226 Difference]: Without dead ends: 74 [2022-12-13 12:41:02,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:41:02,913 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:02,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 57 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:41:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-13 12:41:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2022-12-13 12:41:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-12-13 12:41:02,922 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2022-12-13 12:41:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:02,922 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-12-13 12:41:02,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-12-13 12:41:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 12:41:02,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:02,923 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:02,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:41:03,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:03,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:03,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1240264099, now seen corresponding path program 3 times [2022-12-13 12:41:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682479259] [2022-12-13 12:41:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:03,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682479259] [2022-12-13 12:41:03,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682479259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692984631] [2022-12-13 12:41:03,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:41:03,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:03,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:03,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:03,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:41:03,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 12:41:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 12:41:03,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:03,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:03,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692984631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:03,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:03,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-13 12:41:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306475542] [2022-12-13 12:41:03,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:03,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 12:41:03,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 12:41:03,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:41:03,735 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:04,073 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2022-12-13 12:41:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 12:41:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 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 31 [2022-12-13 12:41:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:04,074 INFO L225 Difference]: With dead ends: 208 [2022-12-13 12:41:04,074 INFO L226 Difference]: Without dead ends: 182 [2022-12-13 12:41:04,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=985, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 12:41:04,075 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 186 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:04,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 63 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:41:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-13 12:41:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 89. [2022-12-13 12:41:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-12-13 12:41:04,084 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2022-12-13 12:41:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:04,084 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-12-13 12:41:04,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-12-13 12:41:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 12:41:04,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:04,085 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:04,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:41:04,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:04,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash 351142503, now seen corresponding path program 4 times [2022-12-13 12:41:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:04,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288008356] [2022-12-13 12:41:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:04,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:04,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288008356] [2022-12-13 12:41:04,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288008356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:04,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784874155] [2022-12-13 12:41:04,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:41:04,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:04,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:04,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:04,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:41:04,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:41:04,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:41:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:05,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784874155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:05,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:05,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-12-13 12:41:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810740130] [2022-12-13 12:41:05,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 12:41:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 12:41:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 12:41:05,505 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:06,218 INFO L93 Difference]: Finished difference Result 556 states and 626 transitions. [2022-12-13 12:41:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 12:41:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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 55 [2022-12-13 12:41:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:06,222 INFO L225 Difference]: With dead ends: 556 [2022-12-13 12:41:06,223 INFO L226 Difference]: Without dead ends: 506 [2022-12-13 12:41:06,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1853, Invalid=3697, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 12:41:06,227 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 434 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:06,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 131 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:41:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-12-13 12:41:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 173. [2022-12-13 12:41:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1453488372093024) internal successors, (197), 172 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 197 transitions. [2022-12-13 12:41:06,254 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 197 transitions. Word has length 55 [2022-12-13 12:41:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:06,254 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 197 transitions. [2022-12-13 12:41:06,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 197 transitions. [2022-12-13 12:41:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 12:41:06,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:06,260 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:06,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:41:06,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:41:06,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:06,461 INFO L85 PathProgramCache]: Analyzing trace with hash -229570577, now seen corresponding path program 5 times [2022-12-13 12:41:06,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:06,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478179534] [2022-12-13 12:41:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:06,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478179534] [2022-12-13 12:41:07,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478179534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795042562] [2022-12-13 12:41:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:41:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:07,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:07,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:41:07,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-12-13 12:41:07,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:07,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 12:41:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:07,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795042562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:09,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:09,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-12-13 12:41:09,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246708238] [2022-12-13 12:41:09,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:09,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-13 12:41:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:09,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-13 12:41:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2022-12-13 12:41:09,938 INFO L87 Difference]: Start difference. First operand 173 states and 197 transitions. Second operand has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:12,850 INFO L93 Difference]: Finished difference Result 1684 states and 1826 transitions. [2022-12-13 12:41:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-12-13 12:41:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 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 103 [2022-12-13 12:41:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:12,858 INFO L225 Difference]: With dead ends: 1684 [2022-12-13 12:41:12,858 INFO L226 Difference]: Without dead ends: 1586 [2022-12-13 12:41:12,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7157, Invalid=14305, Unknown=0, NotChecked=0, Total=21462 [2022-12-13 12:41:12,862 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1351 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:12,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 218 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 12:41:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-12-13 12:41:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 341. [2022-12-13 12:41:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.1441176470588235) internal successors, (389), 340 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 389 transitions. [2022-12-13 12:41:12,907 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 389 transitions. Word has length 103 [2022-12-13 12:41:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:12,907 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 389 transitions. [2022-12-13 12:41:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 389 transitions. [2022-12-13 12:41:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-12-13 12:41:12,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:12,910 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:12,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 12:41:13,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:13,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1249213697, now seen corresponding path program 6 times [2022-12-13 12:41:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266847590] [2022-12-13 12:41:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266847590] [2022-12-13 12:41:17,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266847590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958018900] [2022-12-13 12:41:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:41:17,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:17,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:17,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:17,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:41:17,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-12-13 12:41:17,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:41:17,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-13 12:41:17,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:41:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:17,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:24,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958018900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:24,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:24,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 195 [2022-12-13 12:41:24,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82010137] [2022-12-13 12:41:24,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-12-13 12:41:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-12-13 12:41:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2022-12-13 12:41:24,027 INFO L87 Difference]: Start difference. First operand 341 states and 389 transitions. Second operand has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 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) [2022-12-13 12:41:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:41:43,553 INFO L93 Difference]: Finished difference Result 5668 states and 5954 transitions. [2022-12-13 12:41:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-12-13 12:41:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 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) Word has length 199 [2022-12-13 12:41:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:41:43,562 INFO L225 Difference]: With dead ends: 5668 [2022-12-13 12:41:43,562 INFO L226 Difference]: Without dead ends: 5474 [2022-12-13 12:41:43,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9688 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=28133, Invalid=56257, Unknown=0, NotChecked=0, Total=84390 [2022-12-13 12:41:43,570 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2617 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 1362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1362 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:41:43,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2617 Valid, 422 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1362 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 12:41:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2022-12-13 12:41:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 677. [2022-12-13 12:41:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.143491124260355) internal successors, (773), 676 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 773 transitions. [2022-12-13 12:41:43,798 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 773 transitions. Word has length 199 [2022-12-13 12:41:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:41:43,799 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 773 transitions. [2022-12-13 12:41:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 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) [2022-12-13 12:41:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 773 transitions. [2022-12-13 12:41:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-12-13 12:41:43,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:41:43,807 INFO L195 NwaCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:41:43,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 12:41:44,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:44,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:41:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:41:44,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1430993183, now seen corresponding path program 7 times [2022-12-13 12:41:44,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:41:44,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803609114] [2022-12-13 12:41:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:41:44,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:41:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:41:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803609114] [2022-12-13 12:41:59,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803609114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:41:59,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553373376] [2022-12-13 12:41:59,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:41:59,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:41:59,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:41:59,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:41:59,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:41:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:41:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-13 12:41:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:42:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:42:18,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:42:18,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553373376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:42:18,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:42:18,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [194] total 385 [2022-12-13 12:42:18,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22917782] [2022-12-13 12:42:18,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:42:18,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-13 12:42:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-13 12:42:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2022-12-13 12:42:18,456 INFO L87 Difference]: Start difference. First operand 677 states and 773 transitions. Second operand has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:42:31,596 INFO L93 Difference]: Finished difference Result 27957 states and 28143 transitions. [2022-12-13 12:42:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-12-13 12:42:31,597 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 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 391 [2022-12-13 12:42:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:42:31,599 INFO L225 Difference]: With dead ends: 27957 [2022-12-13 12:42:31,599 INFO L226 Difference]: Without dead ends: 1200 [2022-12-13 12:42:31,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36480 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2022-12-13 12:42:31,620 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 701 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:42:31,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1241 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 12:42:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-12-13 12:42:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1184. [2022-12-13 12:42:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.007607776838546) internal successors, (1192), 1183 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1192 transitions. [2022-12-13 12:42:31,769 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1192 transitions. Word has length 391 [2022-12-13 12:42:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:42:31,769 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1192 transitions. [2022-12-13 12:42:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1192 transitions. [2022-12-13 12:42:31,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-12-13 12:42:31,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:42:31,774 INFO L195 NwaCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:42:31,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:42:31,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:31,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:42:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash -548522195, now seen corresponding path program 1 times [2022-12-13 12:42:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:31,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380268576] [2022-12-13 12:42:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:31,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:42:46,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380268576] [2022-12-13 12:42:46,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380268576] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:42:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218762910] [2022-12-13 12:42:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:46,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:46,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:42:46,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:42:46,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:42:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 197 conjunts are in the unsatisfiable core [2022-12-13 12:42:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:42:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:42:46,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:42:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:42:57,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218762910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:42:57,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:42:57,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 205 [2022-12-13 12:42:57,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621531075] [2022-12-13 12:42:57,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:42:57,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-12-13 12:42:57,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-12-13 12:42:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20508, Invalid=21312, Unknown=0, NotChecked=0, Total=41820 [2022-12-13 12:42:57,205 INFO L87 Difference]: Start difference. First operand 1184 states and 1192 transitions. Second operand has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:43:05,708 INFO L93 Difference]: Finished difference Result 2335 states and 2470 transitions. [2022-12-13 12:43:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-13 12:43:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 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 391 [2022-12-13 12:43:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:43:05,709 INFO L225 Difference]: With dead ends: 2335 [2022-12-13 12:43:05,709 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 12:43:05,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 589 SyntacticMatches, 182 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19326 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=20634, Invalid=24948, Unknown=0, NotChecked=0, Total=45582 [2022-12-13 12:43:05,713 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1235 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:43:05,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 332 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 12:43:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 12:43:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 12:43:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 12:43:05,713 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 391 [2022-12-13 12:43:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:43:05,714 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 12:43:05,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 12:43:05,714 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 12:43:05,716 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 12:43:05,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:43:05,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72132666-cd95-47d5-9445-b1106f9eb3b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:43:05,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.