./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ --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 98bc833889bf97eabed50b7ee23613fe9d5db74d8eb864c2f87c567c38e52240 --- 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-dbf71c6-m [2022-10-17 11:00:35,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:00:35,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:00:36,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:00:36,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:00:36,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:00:36,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:00:36,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:00:36,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:00:36,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:00:36,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:00:36,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:00:36,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:00:36,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:00:36,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:00:36,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:00:36,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:00:36,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:00:36,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:00:36,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:00:36,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:00:36,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:00:36,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:00:36,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:00:36,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:00:36,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:00:36,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:00:36,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:00:36,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:00:36,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:00:36,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:00:36,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:00:36,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:00:36,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:00:36,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:00:36,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:00:36,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:00:36,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:00:36,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:00:36,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:00:36,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:00:36,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:00:36,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:00:36,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:00:36,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:00:36,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:00:36,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:00:36,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:00:36,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:00:36,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:00:36,127 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:00:36,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:00:36,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:00:36,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:00:36,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:00:36,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:00:36,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:00:36,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:00:36,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:00:36,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:00:36,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:00:36,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:00:36,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:00:36,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:00:36,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:00:36,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:00:36,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:00:36,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:00:36,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:00:36,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:00:36,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:00:36,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:00:36,134 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:00:36,134 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:00:36,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:00:36,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98bc833889bf97eabed50b7ee23613fe9d5db74d8eb864c2f87c567c38e52240 [2022-10-17 11:00:36,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:00:36,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:00:36,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:00:36,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:00:36,459 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:00:36,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/array-crafted/mapavg4.i [2022-10-17 11:00:36,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/data/80dddef06/6e241e7163214dcba409fc7c009e604f/FLAG2bd203aca [2022-10-17 11:00:36,953 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:00:36,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/sv-benchmarks/c/array-crafted/mapavg4.i [2022-10-17 11:00:36,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/data/80dddef06/6e241e7163214dcba409fc7c009e604f/FLAG2bd203aca [2022-10-17 11:00:37,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/data/80dddef06/6e241e7163214dcba409fc7c009e604f [2022-10-17 11:00:37,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:00:37,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:00:37,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:00:37,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:00:37,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:00:37,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea00863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37, skipping insertion in model container [2022-10-17 11:00:37,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:00:37,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:00:37,609 WARN L230 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_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/sv-benchmarks/c/array-crafted/mapavg4.i[1327,1340] [2022-10-17 11:00:37,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:00:37,637 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:00:37,673 WARN L230 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_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/sv-benchmarks/c/array-crafted/mapavg4.i[1327,1340] [2022-10-17 11:00:37,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:00:37,700 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:00:37,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37 WrapperNode [2022-10-17 11:00:37,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:00:37,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:00:37,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:00:37,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:00:37,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,746 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-17 11:00:37,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:00:37,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:00:37,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:00:37,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:00:37,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:00:37,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:00:37,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:00:37,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:00:37,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (1/1) ... [2022-10-17 11:00:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:00:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:37,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:00:37,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:00:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:00:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:00:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:00:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:00:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:00:37,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:00:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:00:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2022-10-17 11:00:37,868 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2022-10-17 11:00:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:00:37,931 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:00:37,932 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:00:38,108 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:00:38,115 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:00:38,115 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 11:00:38,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:00:38 BoogieIcfgContainer [2022-10-17 11:00:38,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:00:38,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:00:38,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:00:38,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:00:38,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:00:37" (1/3) ... [2022-10-17 11:00:38,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d0cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:00:38, skipping insertion in model container [2022-10-17 11:00:38,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:37" (2/3) ... [2022-10-17 11:00:38,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d0cfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:00:38, skipping insertion in model container [2022-10-17 11:00:38,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:00:38" (3/3) ... [2022-10-17 11:00:38,128 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg4.i [2022-10-17 11:00:38,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:00:38,149 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:00:38,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:00:38,213 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;@3b20cca9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:00:38,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:00:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 11:00:38,228 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:38,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:38,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-10-17 11:00:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771248654] [2022-10-17 11:00:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:38,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:38,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:00:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:38,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 11:00:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:38,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 11:00:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 11:00:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771248654] [2022-10-17 11:00:38,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771248654] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178378815] [2022-10-17 11:00:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:38,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:38,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:38,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:38,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:00:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:00:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 11:00:38,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:00:38,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178378815] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:38,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:00:38,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 11:00:38,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550350607] [2022-10-17 11:00:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:38,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:38,950 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 11:00:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:38,994 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-10-17 11:00:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-10-17 11:00:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:39,004 INFO L225 Difference]: With dead ends: 50 [2022-10-17 11:00:39,004 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 11:00:39,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:39,011 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:39,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:00:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 11:00:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-10-17 11:00:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-10-17 11:00:39,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-10-17 11:00:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:39,049 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-10-17 11:00:39,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 11:00:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-10-17 11:00:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 11:00:39,052 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:39,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:39,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:39,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 11:00:39,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-10-17 11:00:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:39,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651445302] [2022-10-17 11:00:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:39,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 11:00:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:39,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 11:00:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 11:00:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 11:00:39,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651445302] [2022-10-17 11:00:39,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651445302] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585847154] [2022-10-17 11:00:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:39,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:39,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:39,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:39,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:00:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:39,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:00:39,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 11:00:39,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:00:39,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585847154] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:39,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:00:39,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 11:00:39,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310299230] [2022-10-17 11:00:39,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:39,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:39,597 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 11:00:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:39,613 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-10-17 11:00:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-10-17 11:00:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:39,616 INFO L225 Difference]: With dead ends: 42 [2022-10-17 11:00:39,616 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 11:00:39,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:39,621 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:39,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:00:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 11:00:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-10-17 11:00:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-10-17 11:00:39,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-10-17 11:00:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:39,637 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-10-17 11:00:39,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 11:00:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-10-17 11:00:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 11:00:39,638 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:39,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:39,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:39,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-10-17 11:00:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:39,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433695085] [2022-10-17 11:00:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:39,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 11:00:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 11:00:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-17 11:00:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 11:00:40,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433695085] [2022-10-17 11:00:40,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433695085] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548406154] [2022-10-17 11:00:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:40,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:40,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:00:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:00:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 11:00:40,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:00:40,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548406154] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:40,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:00:40,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 11:00:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885668567] [2022-10-17 11:00:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:00:40,217 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 11:00:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:40,244 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-10-17 11:00:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:40,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-10-17 11:00:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:40,246 INFO L225 Difference]: With dead ends: 39 [2022-10-17 11:00:40,246 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 11:00:40,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:00:40,253 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:40,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:00:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 11:00:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-10-17 11:00:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-10-17 11:00:40,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-10-17 11:00:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:40,264 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-10-17 11:00:40,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 11:00:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-10-17 11:00:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 11:00:40,270 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:40,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:40,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:40,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:40,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-10-17 11:00:40,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:40,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205199011] [2022-10-17 11:00:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:40,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 11:00:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 11:00:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:00:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 11:00:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:40,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205199011] [2022-10-17 11:00:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205199011] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554802963] [2022-10-17 11:00:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:40,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:40,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:40,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:40,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:00:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:00:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 11:00:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 11:00:40,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554802963] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:40,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:40,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-10-17 11:00:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071060036] [2022-10-17 11:00:40,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:40,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:00:40,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:00:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:00:40,816 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 11:00:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:40,891 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-10-17 11:00:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:00:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-10-17 11:00:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:40,894 INFO L225 Difference]: With dead ends: 54 [2022-10-17 11:00:40,894 INFO L226 Difference]: Without dead ends: 34 [2022-10-17 11:00:40,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:00:40,895 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:40,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:00:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-10-17 11:00:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-10-17 11:00:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-10-17 11:00:40,902 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-10-17 11:00:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:40,903 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-10-17 11:00:40,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 11:00:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-10-17 11:00:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 11:00:40,923 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:40,924 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:41,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:41,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-10-17 11:00:41,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:41,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478393092] [2022-10-17 11:00:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:41,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 11:00:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:41,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-10-17 11:00:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:41,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 11:00:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-10-17 11:00:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:41,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478393092] [2022-10-17 11:00:41,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478393092] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:41,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692365325] [2022-10-17 11:00:41,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:00:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:41,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:41,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 11:00:41,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:00:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:41,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:00:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-10-17 11:00:41,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-10-17 11:00:41,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692365325] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:41,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:41,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-10-17 11:00:41,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490927011] [2022-10-17 11:00:41,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:41,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 11:00:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 11:00:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:00:41,539 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 11:00:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:41,613 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-10-17 11:00:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 11:00:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-10-17 11:00:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:41,616 INFO L225 Difference]: With dead ends: 70 [2022-10-17 11:00:41,616 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 11:00:41,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:00:41,618 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:41,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:00:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 11:00:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-10-17 11:00:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-10-17 11:00:41,644 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-10-17 11:00:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:41,644 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-10-17 11:00:41,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 11:00:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-10-17 11:00:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-17 11:00:41,649 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:41,649 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:41,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:41,865 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-10-17 11:00:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633499859] [2022-10-17 11:00:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 11:00:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:42,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-10-17 11:00:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 11:00:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-10-17 11:00:42,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633499859] [2022-10-17 11:00:42,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633499859] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519030993] [2022-10-17 11:00:42,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 11:00:42,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:42,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:42,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 11:00:42,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 11:00:42,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 11:00:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-10-17 11:00:42,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-10-17 11:00:42,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519030993] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:42,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:42,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-10-17 11:00:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901405348] [2022-10-17 11:00:42,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 11:00:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 11:00:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-10-17 11:00:42,541 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:42,632 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-10-17 11:00:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 11:00:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-10-17 11:00:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:42,636 INFO L225 Difference]: With dead ends: 82 [2022-10-17 11:00:42,636 INFO L226 Difference]: Without dead ends: 58 [2022-10-17 11:00:42,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-10-17 11:00:42,640 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:42,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:00:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-17 11:00:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-10-17 11:00:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-10-17 11:00:42,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-10-17 11:00:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:42,659 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-10-17 11:00:42,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-10-17 11:00:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-10-17 11:00:42,662 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:42,662 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:42,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:42,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:42,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2022-10-17 11:00:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:42,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264719848] [2022-10-17 11:00:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:42,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-17 11:00:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:43,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-10-17 11:00:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:43,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-10-17 11:00:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-10-17 11:00:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264719848] [2022-10-17 11:00:43,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264719848] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541185237] [2022-10-17 11:00:43,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 11:00:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:43,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:43,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 11:00:43,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 11:00:43,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:43,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 11:00:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-10-17 11:00:43,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-10-17 11:00:43,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541185237] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:43,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:43,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-10-17 11:00:43,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261530339] [2022-10-17 11:00:43,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:43,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 11:00:43,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 11:00:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-10-17 11:00:43,582 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:43,668 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-10-17 11:00:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 11:00:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-10-17 11:00:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:43,672 INFO L225 Difference]: With dead ends: 100 [2022-10-17 11:00:43,672 INFO L226 Difference]: Without dead ends: 68 [2022-10-17 11:00:43,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-10-17 11:00:43,676 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:43,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:00:43,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-17 11:00:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-10-17 11:00:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-10-17 11:00:43,697 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-10-17 11:00:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:43,698 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-10-17 11:00:43,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-10-17 11:00:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 11:00:43,699 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:43,699 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:43,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:43,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:43,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:43,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2022-10-17 11:00:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:43,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955404994] [2022-10-17 11:00:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:43,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:44,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:00:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:44,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-10-17 11:00:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:44,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-10-17 11:00:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-10-17 11:00:44,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955404994] [2022-10-17 11:00:44,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955404994] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246214088] [2022-10-17 11:00:44,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 11:00:44,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:44,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:44,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:44,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 11:00:45,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-10-17 11:00:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:00:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-10-17 11:00:45,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-10-17 11:00:45,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246214088] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:45,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:45,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-10-17 11:00:45,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078230391] [2022-10-17 11:00:45,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:45,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-17 11:00:45,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-17 11:00:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-10-17 11:00:45,731 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:45,849 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-10-17 11:00:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-10-17 11:00:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-10-17 11:00:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:45,851 INFO L225 Difference]: With dead ends: 126 [2022-10-17 11:00:45,852 INFO L226 Difference]: Without dead ends: 86 [2022-10-17 11:00:45,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-10-17 11:00:45,854 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:45,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:00:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-17 11:00:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-10-17 11:00:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-10-17 11:00:45,867 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-10-17 11:00:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:45,870 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-10-17 11:00:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-10-17 11:00:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-10-17 11:00:45,879 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:45,879 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:45,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 11:00:46,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2022-10-17 11:00:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358105897] [2022-10-17 11:00:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:46,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 11:00:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:46,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 11:00:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:46,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-10-17 11:00:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-10-17 11:00:46,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358105897] [2022-10-17 11:00:46,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358105897] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093082536] [2022-10-17 11:00:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 11:00:46,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:46,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:46,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 11:00:47,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-10-17 11:00:47,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:00:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-10-17 11:00:47,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-10-17 11:00:47,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093082536] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:47,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:47,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-10-17 11:00:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876212542] [2022-10-17 11:00:47,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:47,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-17 11:00:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-17 11:00:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-10-17 11:00:47,546 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:47,662 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-10-17 11:00:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-10-17 11:00:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-10-17 11:00:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:47,664 INFO L225 Difference]: With dead ends: 160 [2022-10-17 11:00:47,664 INFO L226 Difference]: Without dead ends: 104 [2022-10-17 11:00:47,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-10-17 11:00:47,666 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:47,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:00:47,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-10-17 11:00:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-10-17 11:00:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-10-17 11:00:47,675 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-10-17 11:00:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:47,675 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-10-17 11:00:47,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:00:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-10-17 11:00:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-10-17 11:00:47,678 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:47,678 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:47,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:47,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:47,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2022-10-17 11:00:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:47,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992943263] [2022-10-17 11:00:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:47,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:48,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-10-17 11:00:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:48,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-10-17 11:00:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-10-17 11:00:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992943263] [2022-10-17 11:00:48,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992943263] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795661740] [2022-10-17 11:00:48,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 11:00:48,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:48,485 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:48,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 11:00:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 11:00:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:48,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:49,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795661740] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:49,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:49,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-17 11:00:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894053750] [2022-10-17 11:00:49,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:49,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-17 11:00:49,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:49,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-17 11:00:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 11:00:49,116 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 11:00:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:49,216 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-10-17 11:00:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-17 11:00:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-10-17 11:00:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:49,218 INFO L225 Difference]: With dead ends: 207 [2022-10-17 11:00:49,218 INFO L226 Difference]: Without dead ends: 135 [2022-10-17 11:00:49,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 11:00:49,220 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:49,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:00:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-10-17 11:00:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-10-17 11:00:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-10-17 11:00:49,230 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-10-17 11:00:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:49,230 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-10-17 11:00:49,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 11:00:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-10-17 11:00:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-10-17 11:00:49,233 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:49,233 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:49,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:49,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 11:00:49,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2022-10-17 11:00:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388014913] [2022-10-17 11:00:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-10-17 11:00:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:50,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-10-17 11:00:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:50,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-17 11:00:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:50,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:50,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388014913] [2022-10-17 11:00:50,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388014913] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:50,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962190640] [2022-10-17 11:00:50,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:00:50,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:50,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:50,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:50,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 11:00:51,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:00:51,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-17 11:00:51,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:51,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:00:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:52,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962190640] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:00:52,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:00:52,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-17 11:00:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211039510] [2022-10-17 11:00:52,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:00:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-17 11:00:52,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-17 11:00:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-17 11:00:52,550 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 11:00:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:52,788 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2022-10-17 11:00:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-17 11:00:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-10-17 11:00:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:52,792 INFO L225 Difference]: With dead ends: 271 [2022-10-17 11:00:52,792 INFO L226 Difference]: Without dead ends: 199 [2022-10-17 11:00:52,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-17 11:00:52,796 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:52,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:00:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-17 11:00:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-10-17 11:00:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:00:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-10-17 11:00:52,808 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2022-10-17 11:00:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:52,810 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-10-17 11:00:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 11:00:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-10-17 11:00:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-10-17 11:00:52,814 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:52,814 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:52,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:53,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:53,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash -148428801, now seen corresponding path program 9 times [2022-10-17 11:00:53,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:53,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628569875] [2022-10-17 11:00:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:53,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:57,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-10-17 11:00:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:57,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-10-17 11:00:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:57,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-10-17 11:00:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-10-17 11:00:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:57,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628569875] [2022-10-17 11:00:57,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628569875] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:57,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081360286] [2022-10-17 11:00:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 11:00:57,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:57,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:57,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:57,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 11:00:59,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-10-17 11:00:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:00:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 11:00:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-10-17 11:00:59,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:01:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-10-17 11:01:00,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081360286] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:01:00,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:01:00,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2022-10-17 11:01:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028396246] [2022-10-17 11:01:00,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:01:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-10-17 11:01:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-10-17 11:01:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-10-17 11:01:00,659 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:01:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:00,961 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2022-10-17 11:01:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-10-17 11:01:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2022-10-17 11:01:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:00,967 INFO L225 Difference]: With dead ends: 306 [2022-10-17 11:01:00,967 INFO L226 Difference]: Without dead ends: 234 [2022-10-17 11:01:00,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-10-17 11:01:00,972 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:00,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:01:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-10-17 11:01:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-10-17 11:01:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 11:01:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-10-17 11:01:00,984 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2022-10-17 11:01:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:00,986 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-10-17 11:01:00,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 11:01:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-10-17 11:01:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-10-17 11:01:00,993 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:00,993 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:01,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-10-17 11:01:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:01:01,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2022869279, now seen corresponding path program 10 times [2022-10-17 11:01:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:01,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161784137] [2022-10-17 11:01:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:05,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-10-17 11:01:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:05,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-17 11:01:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-10-17 11:01:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-10-17 11:01:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:05,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161784137] [2022-10-17 11:01:05,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161784137] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:01:05,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681999739] [2022-10-17 11:01:05,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 11:01:05,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:01:05,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:05,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:01:05,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc11ac4-d5f8-44f7-8c8f-7113c76b50a3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 11:01:05,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 11:01:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:01:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-17 11:01:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:01:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2022-10-17 11:01:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates...