./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc --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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- 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-5e519f3 [2022-11-02 20:45:28,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:45:28,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:45:28,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:45:28,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:45:28,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:45:28,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:45:28,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:45:28,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:45:28,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:45:28,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:45:28,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:45:28,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:45:28,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:45:28,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:45:28,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:45:28,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:45:28,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:45:28,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:45:28,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:45:28,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:45:28,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:45:28,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:45:28,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:45:28,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:45:28,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:45:28,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:45:28,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:45:28,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:45:28,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:45:28,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:45:28,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:45:28,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:45:28,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:45:28,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:45:28,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:45:28,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:45:28,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:45:28,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:45:28,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:45:28,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:45:28,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:45:28,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:45:28,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:45:28,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:45:28,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:45:28,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:45:28,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:45:28,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:45:28,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:45:28,646 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:45:28,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:45:28,647 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:45:28,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:45:28,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:45:28,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:45:28,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:45:28,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:45:28,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:45:28,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:45:28,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:45:28,649 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:45:28,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:45:28,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:45:28,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:45:28,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:45:28,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:45:28,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:45:28,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:45:28,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:45:28,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:45:28,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:45:28,653 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:45:28,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:45:28,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:45:28,654 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_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-11-02 20:45:28,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:45:28,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:45:28,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:45:28,989 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:45:28,990 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:45:28,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/verifythis/tree_max.c [2022-11-02 20:45:29,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/data/131f9971c/4ce524a6e4f54d93bc7e04dc3cfa1315/FLAG1807296d4 [2022-11-02 20:45:29,623 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:45:29,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/sv-benchmarks/c/verifythis/tree_max.c [2022-11-02 20:45:29,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/data/131f9971c/4ce524a6e4f54d93bc7e04dc3cfa1315/FLAG1807296d4 [2022-11-02 20:45:29,955 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/data/131f9971c/4ce524a6e4f54d93bc7e04dc3cfa1315 [2022-11-02 20:45:29,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:45:29,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:45:29,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:45:29,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:45:29,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:45:29,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:29" (1/1) ... [2022-11-02 20:45:29,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642e3a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:29, skipping insertion in model container [2022-11-02 20:45:29,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:29" (1/1) ... [2022-11-02 20:45:29,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:45:30,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:45:30,168 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_240ded1f-e759-4106-b1e1-27d6275c1e1e/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-02 20:45:30,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:45:30,203 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:45:30,215 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_240ded1f-e759-4106-b1e1-27d6275c1e1e/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-02 20:45:30,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:45:30,236 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:45:30,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30 WrapperNode [2022-11-02 20:45:30,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:45:30,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:45:30,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:45:30,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:45:30,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,280 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2022-11-02 20:45:30,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:45:30,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:45:30,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:45:30,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:45:30,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,328 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:45:30,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:45:30,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:45:30,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:45:30,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (1/1) ... [2022-11-02 20:45:30,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:45:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:30,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:45:30,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:45:30,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:45:30,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:45:30,416 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-02 20:45:30,417 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-02 20:45:30,418 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-02 20:45:30,418 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-02 20:45:30,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:45:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-02 20:45:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-02 20:45:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:45:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:45:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:45:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:45:30,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:45:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:45:30,552 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:45:30,555 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:45:30,816 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:45:30,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:45:30,822 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 20:45:30,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:45:30 BoogieIcfgContainer [2022-11-02 20:45:30,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:45:30,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:45:30,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:45:30,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:45:30,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:45:29" (1/3) ... [2022-11-02 20:45:30,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4156727c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:45:30, skipping insertion in model container [2022-11-02 20:45:30,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:30" (2/3) ... [2022-11-02 20:45:30,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4156727c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:45:30, skipping insertion in model container [2022-11-02 20:45:30,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:45:30" (3/3) ... [2022-11-02 20:45:30,849 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-11-02 20:45:30,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:45:30,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:45:30,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:45:30,969 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;@15913333, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:45:30,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:45:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:45:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:45:30,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:30,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:30,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2022-11-02 20:45:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319008125] [2022-11-02 20:45:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:31,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:31,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:45:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:31,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:31,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319008125] [2022-11-02 20:45:31,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319008125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:31,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:31,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:45:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677139963] [2022-11-02 20:45:31,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:45:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:45:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:45:31,738 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:45:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:32,194 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-11-02 20:45:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-02 20:45:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:32,215 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:45:32,223 INFO L226 Difference]: Without dead ends: 35 [2022-11-02 20:45:32,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:45:32,231 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:32,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:45:32,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-02 20:45:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-02 20:45:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-02 20:45:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-02 20:45:32,289 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2022-11-02 20:45:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:32,289 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-02 20:45:32,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:45:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-02 20:45:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:45:32,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:32,292 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:32,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:45:32,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2022-11-02 20:45:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:32,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215934639] [2022-11-02 20:45:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:32,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:32,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:32,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:45:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:32,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:45:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-02 20:45:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:45:32,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:32,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215934639] [2022-11-02 20:45:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215934639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:32,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:32,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:45:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279462304] [2022-11-02 20:45:32,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:32,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:45:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:45:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:45:32,611 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:45:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:32,834 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-11-02 20:45:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-02 20:45:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:32,836 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:45:32,836 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:45:32,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:45:32,838 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:32,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 108 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:45:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:45:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-02 20:45:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:45:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-11-02 20:45:32,849 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2022-11-02 20:45:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:32,850 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-11-02 20:45:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:45:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-11-02 20:45:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:45:32,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:32,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:32,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:45:32,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:32,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:32,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2022-11-02 20:45:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804670359] [2022-11-02 20:45:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:45:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:45:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-02 20:45:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:45:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:45:33,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804670359] [2022-11-02 20:45:33,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804670359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:33,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686056633] [2022-11-02 20:45:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:33,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:33,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:33,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:33,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:45:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:45:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:34,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:45:34,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:34,471 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:45:34,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-02 20:45:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:45:34,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686056633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:34,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:34,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2022-11-02 20:45:34,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616411350] [2022-11-02 20:45:34,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:34,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:45:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:45:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:45:34,526 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 20:45:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:35,187 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-02 20:45:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:45:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-11-02 20:45:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:35,190 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:45:35,190 INFO L226 Difference]: Without dead ends: 44 [2022-11-02 20:45:35,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:45:35,192 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:35,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 164 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:45:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-02 20:45:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-11-02 20:45:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:45:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-11-02 20:45:35,203 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2022-11-02 20:45:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:35,204 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-11-02 20:45:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 20:45:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-11-02 20:45:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:45:35,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:35,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:35,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:35,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:35,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:35,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2022-11-02 20:45:35,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594933618] [2022-11-02 20:45:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:35,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:35,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:35,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:45:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:35,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:45:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:35,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-02 20:45:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:36,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:36,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:45:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:45:36,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:36,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594933618] [2022-11-02 20:45:36,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594933618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728553858] [2022-11-02 20:45:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:36,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:36,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:36,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:36,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:45:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 20:45:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:36,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:45:36,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:45:36,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:36,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:45:36,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:45,385 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:45:51,545 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:45:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:45:51,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728553858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:51,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:51,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2022-11-02 20:45:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712329399] [2022-11-02 20:45:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:51,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:45:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:45:51,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2022-11-02 20:45:51,700 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:45:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:53,217 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-11-02 20:45:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:45:53,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2022-11-02 20:45:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:53,220 INFO L225 Difference]: With dead ends: 76 [2022-11-02 20:45:53,220 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:45:53,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=239, Invalid=1922, Unknown=1, NotChecked=0, Total=2162 [2022-11-02 20:45:53,225 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:53,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 335 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 914 Invalid, 0 Unknown, 160 Unchecked, 0.7s Time] [2022-11-02 20:45:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:45:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-11-02 20:45:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-02 20:45:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-11-02 20:45:53,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 47 [2022-11-02 20:45:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:53,255 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-11-02 20:45:53,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:45:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-11-02 20:45:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:45:53,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:53,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:53,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:53,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:53,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2022-11-02 20:45:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:53,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408447653] [2022-11-02 20:45:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:53,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:45:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:45:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-02 20:45:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:45:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:45:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:45:54,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:54,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408447653] [2022-11-02 20:45:54,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408447653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:54,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907483947] [2022-11-02 20:45:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:54,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:54,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:54,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:54,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:45:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 20:45:54,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:54,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:45:54,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:45:54,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:54,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:45:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:03,127 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:46:09,243 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:46:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:46:09,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907483947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:09,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:09,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-11-02 20:46:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278452246] [2022-11-02 20:46:09,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:09,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:46:09,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:46:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2022-11-02 20:46:09,391 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-02 20:46:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:10,703 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2022-11-02 20:46:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:46:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2022-11-02 20:46:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:10,706 INFO L225 Difference]: With dead ends: 152 [2022-11-02 20:46:10,706 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 20:46:10,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2022-11-02 20:46:10,709 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 222 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 788 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2022-11-02 20:46:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 20:46:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-11-02 20:46:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (32), 15 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-02 20:46:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2022-11-02 20:46:10,726 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2022-11-02 20:46:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:10,726 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2022-11-02 20:46:10,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-02 20:46:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2022-11-02 20:46:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:46:10,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:10,729 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:10,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:10,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:10,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2022-11-02 20:46:10,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:10,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514489751] [2022-11-02 20:46:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:10,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:46:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:46:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:12,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514489751] [2022-11-02 20:46:12,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514489751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:12,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498266023] [2022-11-02 20:46:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:46:12,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:12,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:12,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:46:13,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:46:13,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-02 20:46:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:13,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:46:13,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-02 20:46:14,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:46:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 20:46:14,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:15,113 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:46:15,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2022-11-02 20:46:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498266023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:15,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:46:15,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2022-11-02 20:46:15,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270767224] [2022-11-02 20:46:15,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:15,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 20:46:15,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 20:46:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:46:15,481 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:46:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:19,551 INFO L93 Difference]: Finished difference Result 163 states and 287 transitions. [2022-11-02 20:46:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:46:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2022-11-02 20:46:19,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:19,558 INFO L225 Difference]: With dead ends: 163 [2022-11-02 20:46:19,558 INFO L226 Difference]: Without dead ends: 161 [2022-11-02 20:46:19,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2022-11-02 20:46:19,568 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 163 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:19,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 20:46:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-02 20:46:19,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-11-02 20:46:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 20 states have call successors, (20), 11 states have call predecessors, (20), 17 states have return successors, (86), 24 states have call predecessors, (86), 12 states have call successors, (86) [2022-11-02 20:46:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 223 transitions. [2022-11-02 20:46:19,598 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 223 transitions. Word has length 70 [2022-11-02 20:46:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:19,598 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 223 transitions. [2022-11-02 20:46:19,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:46:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 223 transitions. [2022-11-02 20:46:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:46:19,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:19,602 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:19,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:19,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:46:19,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2022-11-02 20:46:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:19,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317736374] [2022-11-02 20:46:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:20,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:46:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:46:21,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:21,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317736374] [2022-11-02 20:46:21,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317736374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:21,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297477875] [2022-11-02 20:46:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:21,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:21,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:46:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-02 20:46:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:22,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:46:23,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-02 20:46:23,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:46:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 20:46:23,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:24,511 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:46:24,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2022-11-02 20:46:25,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297477875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:25,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:46:25,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2022-11-02 20:46:25,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001272950] [2022-11-02 20:46:25,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:25,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-02 20:46:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-02 20:46:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 20:46:25,062 INFO L87 Difference]: Start difference. First operand 134 states and 223 transitions. Second operand has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:46:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:32,669 INFO L93 Difference]: Finished difference Result 335 states and 640 transitions. [2022-11-02 20:46:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-02 20:46:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2022-11-02 20:46:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:32,678 INFO L225 Difference]: With dead ends: 335 [2022-11-02 20:46:32,682 INFO L226 Difference]: Without dead ends: 223 [2022-11-02 20:46:32,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=874, Invalid=11558, Unknown=0, NotChecked=0, Total=12432 [2022-11-02 20:46:32,693 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 161 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:32,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 423 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-02 20:46:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-02 20:46:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2022-11-02 20:46:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.212962962962963) internal successors, (131), 114 states have internal predecessors, (131), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (122), 26 states have call predecessors, (122), 12 states have call successors, (122) [2022-11-02 20:46:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 273 transitions. [2022-11-02 20:46:32,759 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 273 transitions. Word has length 71 [2022-11-02 20:46:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:32,760 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 273 transitions. [2022-11-02 20:46:32,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:46:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 273 transitions. [2022-11-02 20:46:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:46:32,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:32,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:32,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:32,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:32,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2022-11-02 20:46:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:32,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264338488] [2022-11-02 20:46:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:32,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:46:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:46:33,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264338488] [2022-11-02 20:46:33,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264338488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265736055] [2022-11-02 20:46:33,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:46:33,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:33,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:46:33,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:46:33,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:46:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:46:33,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:46:34,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265736055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:34,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:34,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2022-11-02 20:46:34,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201035838] [2022-11-02 20:46:34,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:34,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:46:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:46:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:46:34,184 INFO L87 Difference]: Start difference. First operand 152 states and 273 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 20:46:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:35,702 INFO L93 Difference]: Finished difference Result 305 states and 646 transitions. [2022-11-02 20:46:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:46:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2022-11-02 20:46:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:35,722 INFO L225 Difference]: With dead ends: 305 [2022-11-02 20:46:35,722 INFO L226 Difference]: Without dead ends: 175 [2022-11-02 20:46:35,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 152 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:46:35,724 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:35,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 297 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:46:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-02 20:46:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2022-11-02 20:46:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 113 states have (on average 1.168141592920354) internal successors, (132), 118 states have internal predecessors, (132), 20 states have call successors, (20), 11 states have call predecessors, (20), 24 states have return successors, (129), 28 states have call predecessors, (129), 12 states have call successors, (129) [2022-11-02 20:46:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 281 transitions. [2022-11-02 20:46:35,752 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 281 transitions. Word has length 71 [2022-11-02 20:46:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:35,753 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 281 transitions. [2022-11-02 20:46:35,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 20:46:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 281 transitions. [2022-11-02 20:46:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:46:35,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:35,755 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:35,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:35,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:35,983 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2022-11-02 20:46:35,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:35,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498810741] [2022-11-02 20:46:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:35,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:46:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:46:37,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:37,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498810741] [2022-11-02 20:46:37,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498810741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591836519] [2022-11-02 20:46:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:37,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:37,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:37,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:37,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:46:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-02 20:46:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:39,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:46:39,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-02 20:46:39,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:46:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:46:39,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:40,871 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:46:40,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-11-02 20:46:41,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591836519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:41,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:46:41,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2022-11-02 20:46:41,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449126593] [2022-11-02 20:46:41,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:41,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 20:46:41,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 20:46:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2022-11-02 20:46:41,960 INFO L87 Difference]: Start difference. First operand 158 states and 281 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:46:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:47,227 INFO L93 Difference]: Finished difference Result 191 states and 326 transitions. [2022-11-02 20:46:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:46:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2022-11-02 20:46:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:47,231 INFO L225 Difference]: With dead ends: 191 [2022-11-02 20:46:47,231 INFO L226 Difference]: Without dead ends: 189 [2022-11-02 20:46:47,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2022-11-02 20:46:47,235 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 172 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:47,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 381 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-02 20:46:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-02 20:46:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2022-11-02 20:46:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.165137614678899) internal successors, (127), 114 states have internal predecessors, (127), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (123), 27 states have call predecessors, (123), 12 states have call successors, (123) [2022-11-02 20:46:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 270 transitions. [2022-11-02 20:46:47,263 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 270 transitions. Word has length 72 [2022-11-02 20:46:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 270 transitions. [2022-11-02 20:46:47,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:46:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 270 transitions. [2022-11-02 20:46:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:46:47,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:47,266 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:47,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:47,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:47,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2022-11-02 20:46:47,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:47,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485076639] [2022-11-02 20:46:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:48,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:46:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:46:49,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485076639] [2022-11-02 20:46:49,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485076639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:49,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156408963] [2022-11-02 20:46:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:49,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:49,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:49,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:49,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:46:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-02 20:46:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:50,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-02 20:46:50,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:46:50,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:46:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 20:46:50,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:51,158 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-02 20:46:51,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-02 20:46:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156408963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:51,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:46:51,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2022-11-02 20:46:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783173631] [2022-11-02 20:46:51,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:51,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:46:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:46:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:46:51,399 INFO L87 Difference]: Start difference. First operand 153 states and 270 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-02 20:46:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:53,571 INFO L93 Difference]: Finished difference Result 189 states and 309 transitions. [2022-11-02 20:46:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:46:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2022-11-02 20:46:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:53,574 INFO L225 Difference]: With dead ends: 189 [2022-11-02 20:46:53,575 INFO L226 Difference]: Without dead ends: 187 [2022-11-02 20:46:53,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2022-11-02 20:46:53,577 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:53,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 337 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:46:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-02 20:46:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-11-02 20:46:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.183673469387755) internal successors, (116), 99 states have internal predecessors, (116), 19 states have call successors, (19), 10 states have call predecessors, (19), 18 states have return successors, (93), 26 states have call predecessors, (93), 12 states have call successors, (93) [2022-11-02 20:46:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 228 transitions. [2022-11-02 20:46:53,608 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 228 transitions. Word has length 72 [2022-11-02 20:46:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:53,609 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 228 transitions. [2022-11-02 20:46:53,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-02 20:46:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 228 transitions. [2022-11-02 20:46:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:46:53,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:53,611 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:53,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:53,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:53,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 2 times [2022-11-02 20:46:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:53,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678622452] [2022-11-02 20:46:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-02 20:46:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 20:46:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:46:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678622452] [2022-11-02 20:46:54,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678622452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468264007] [2022-11-02 20:46:54,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:46:54,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:54,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:54,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:54,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:46:54,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:46:54,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-02 20:46:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:54,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:46:54,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:46:54,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:46:54,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:46:55,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:46:55,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:46:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:46:55,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:46:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468264007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:55,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:55,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 25 [2022-11-02 20:46:55,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691775746] [2022-11-02 20:46:55,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:46:55,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:46:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:46:55,702 INFO L87 Difference]: Start difference. First operand 136 states and 228 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:46:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:56,048 INFO L93 Difference]: Finished difference Result 243 states and 415 transitions. [2022-11-02 20:46:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:46:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2022-11-02 20:46:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:56,051 INFO L225 Difference]: With dead ends: 243 [2022-11-02 20:46:56,051 INFO L226 Difference]: Without dead ends: 141 [2022-11-02 20:46:56,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:46:56,053 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:56,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 482 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-02 20:46:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-02 20:46:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-02 20:46:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 20 states have call successors, (20), 10 states have call predecessors, (20), 19 states have return successors, (99), 28 states have call predecessors, (99), 13 states have call successors, (99) [2022-11-02 20:46:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 238 transitions. [2022-11-02 20:46:56,074 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 238 transitions. Word has length 60 [2022-11-02 20:46:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:56,074 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 238 transitions. [2022-11-02 20:46:56,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:46:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 238 transitions. [2022-11-02 20:46:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:46:56,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:56,077 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:56,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:56,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:56,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2022-11-02 20:46:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:56,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279658859] [2022-11-02 20:46:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:56,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:56,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:46:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:46:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:56,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:46:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:57,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:57,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:46:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:57,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:46:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:57,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 20:46:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-02 20:46:57,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:57,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279658859] [2022-11-02 20:46:57,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279658859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87248304] [2022-11-02 20:46:57,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:46:57,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:57,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:57,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:57,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:46:57,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:46:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-02 20:46:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:57,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:46:57,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:46:57,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-02 20:46:57,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:46:57,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:46:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 20:46:58,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:58,547 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-02 20:46:58,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-02 20:46:58,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87248304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:58,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:46:58,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2022-11-02 20:46:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522836706] [2022-11-02 20:46:58,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:58,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:46:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:46:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:46:58,725 INFO L87 Difference]: Start difference. First operand 141 states and 238 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-02 20:47:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:00,231 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2022-11-02 20:47:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:47:00,232 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2022-11-02 20:47:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:00,234 INFO L225 Difference]: With dead ends: 168 [2022-11-02 20:47:00,235 INFO L226 Difference]: Without dead ends: 166 [2022-11-02 20:47:00,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:47:00,236 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 265 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:47:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-02 20:47:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2022-11-02 20:47:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 23 states have call successors, (23), 12 states have call predecessors, (23), 20 states have return successors, (105), 30 states have call predecessors, (105), 13 states have call successors, (105) [2022-11-02 20:47:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 261 transitions. [2022-11-02 20:47:00,259 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 261 transitions. Word has length 70 [2022-11-02 20:47:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:00,259 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 261 transitions. [2022-11-02 20:47:00,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-02 20:47:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 261 transitions. [2022-11-02 20:47:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:47:00,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:00,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:00,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:00,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:00,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2022-11-02 20:47:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:00,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241808416] [2022-11-02 20:47:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:00,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:47:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:47:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:47:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 20:47:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:47:01,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:01,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241808416] [2022-11-02 20:47:01,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241808416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399017179] [2022-11-02 20:47:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:01,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:01,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:01,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:47:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-02 20:47:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:02,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:47:02,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:47:03,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:47:03,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-02 20:47:03,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:47:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 20:47:03,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:04,608 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-02 20:47:04,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-11-02 20:47:05,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399017179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:05,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:47:05,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2022-11-02 20:47:05,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757367104] [2022-11-02 20:47:05,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 20:47:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 20:47:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 20:47:05,022 INFO L87 Difference]: Start difference. First operand 158 states and 261 transitions. Second operand has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-02 20:47:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:08,331 INFO L93 Difference]: Finished difference Result 202 states and 370 transitions. [2022-11-02 20:47:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:47:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2022-11-02 20:47:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:08,334 INFO L225 Difference]: With dead ends: 202 [2022-11-02 20:47:08,335 INFO L226 Difference]: Without dead ends: 200 [2022-11-02 20:47:08,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=546, Invalid=7644, Unknown=0, NotChecked=0, Total=8190 [2022-11-02 20:47:08,337 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 114 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:08,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 403 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:47:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-02 20:47:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 169. [2022-11-02 20:47:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.165289256198347) internal successors, (141), 123 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 22 states have return successors, (136), 33 states have call predecessors, (136), 15 states have call successors, (136) [2022-11-02 20:47:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 302 transitions. [2022-11-02 20:47:08,364 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 302 transitions. Word has length 71 [2022-11-02 20:47:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:08,364 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 302 transitions. [2022-11-02 20:47:08,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-02 20:47:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 302 transitions. [2022-11-02 20:47:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:47:08,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:08,367 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:08,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-02 20:47:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:47:08,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2022-11-02 20:47:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611020855] [2022-11-02 20:47:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:47:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:09,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:47:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:10,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:47:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:47:10,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:10,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611020855] [2022-11-02 20:47:10,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611020855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:10,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282192658] [2022-11-02 20:47:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:10,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:10,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:10,267 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:10,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:47:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-02 20:47:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:10,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:47:10,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:47:10,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:47:10,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:47:10,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:47:10,913 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:47:10,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:47:10,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:47:10,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:47:12,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:47:12,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:47:12,257 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:47:12,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-11-02 20:47:12,269 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:47:12,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-02 20:47:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 20:47:12,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:15,466 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 |c_nondet_tree_#res.offset|))) (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| 0 (store (select |c_#memory_$Pointer$.offset| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.base| 0 (store (select |c_#memory_$Pointer$.base| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)))))) is different from false [2022-11-02 20:47:17,551 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base)) (.cse1 (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base)) (.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ 4 c_nondet_tree_~n~0.offset))) (and (forall ((v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1448)))) (store .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)))) (forall ((v_ArrVal_1450 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1450)))) (store .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1450 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1450)))) (store .cse6 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse6 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1448 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1448)))) (store .cse7 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse7 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)))) (forall ((v_ArrVal_1450 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1450)))) (store .cse8 0 (store (select .cse8 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (forall ((v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1448)))) (store .cse9 0 (store (select .cse9 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)))) is different from false [2022-11-02 20:47:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282192658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:17,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:47:17,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2022-11-02 20:47:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386485271] [2022-11-02 20:47:17,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:47:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:47:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2910, Unknown=2, NotChecked=218, Total=3306 [2022-11-02 20:47:17,615 INFO L87 Difference]: Start difference. First operand 169 states and 302 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-02 20:47:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:22,142 INFO L93 Difference]: Finished difference Result 452 states and 844 transitions. [2022-11-02 20:47:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-02 20:47:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2022-11-02 20:47:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:22,148 INFO L225 Difference]: With dead ends: 452 [2022-11-02 20:47:22,148 INFO L226 Difference]: Without dead ends: 440 [2022-11-02 20:47:22,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=648, Invalid=10488, Unknown=2, NotChecked=418, Total=11556 [2022-11-02 20:47:22,151 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 123 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:22,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 672 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1830 Invalid, 0 Unknown, 695 Unchecked, 1.3s Time] [2022-11-02 20:47:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-02 20:47:22,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-11-02 20:47:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 248 states have (on average 1.189516129032258) internal successors, (295), 254 states have internal predecessors, (295), 38 states have call successors, (38), 21 states have call predecessors, (38), 52 states have return successors, (326), 63 states have call predecessors, (326), 22 states have call successors, (326) [2022-11-02 20:47:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 659 transitions. [2022-11-02 20:47:22,207 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 659 transitions. Word has length 76 [2022-11-02 20:47:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:22,207 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 659 transitions. [2022-11-02 20:47:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-02 20:47:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 659 transitions. [2022-11-02 20:47:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:47:22,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:22,212 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:22,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:47:22,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:22,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1523837565, now seen corresponding path program 1 times [2022-11-02 20:47:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:22,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98585133] [2022-11-02 20:47:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:47:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:23,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:23,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:47:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:23,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-02 20:47:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:47:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98585133] [2022-11-02 20:47:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98585133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844818874] [2022-11-02 20:47:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:23,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:23,135 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:23,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:47:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:47:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:23,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:47:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:47:23,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:47:24,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844818874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:47:24,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:47:24,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2022-11-02 20:47:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099618251] [2022-11-02 20:47:24,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:24,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:47:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:47:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:47:24,246 INFO L87 Difference]: Start difference. First operand 339 states and 659 transitions. Second operand has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-02 20:47:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:25,004 INFO L93 Difference]: Finished difference Result 490 states and 940 transitions. [2022-11-02 20:47:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:47:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 72 [2022-11-02 20:47:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:25,010 INFO L225 Difference]: With dead ends: 490 [2022-11-02 20:47:25,010 INFO L226 Difference]: Without dead ends: 463 [2022-11-02 20:47:25,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:47:25,012 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 57 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:25,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 367 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 426 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-11-02 20:47:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-02 20:47:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 365. [2022-11-02 20:47:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 268 states have (on average 1.2014925373134329) internal successors, (322), 271 states have internal predecessors, (322), 41 states have call successors, (41), 23 states have call predecessors, (41), 55 states have return successors, (266), 70 states have call predecessors, (266), 25 states have call successors, (266) [2022-11-02 20:47:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 629 transitions. [2022-11-02 20:47:25,066 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 629 transitions. Word has length 72 [2022-11-02 20:47:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:25,066 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 629 transitions. [2022-11-02 20:47:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-02 20:47:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 629 transitions. [2022-11-02 20:47:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:47:25,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:25,071 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:25,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:25,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:47:25,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 3 times [2022-11-02 20:47:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:25,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383412036] [2022-11-02 20:47:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:47:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:47:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:27,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:47:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:47:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 20:47:27,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383412036] [2022-11-02 20:47:27,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383412036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437204064] [2022-11-02 20:47:27,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:47:27,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:27,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:27,287 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:27,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:47:27,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 20:47:27,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:47:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-02 20:47:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:27,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:47:27,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:47:28,007 INFO L356 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-02 20:47:28,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 37 [2022-11-02 20:47:30,216 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| Int)) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8) 0) (= |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8)))) (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8)) (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8))) 0)))) is different from true [2022-11-02 20:47:38,388 WARN L234 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:47:53,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:47:53,732 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:47:53,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-11-02 20:47:53,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:47:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 31 refuted. 0 times theorem prover too weak. 54 trivial. 18 not checked. [2022-11-02 20:47:53,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:47:56,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437204064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:56,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:47:56,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 44 [2022-11-02 20:47:56,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049644561] [2022-11-02 20:47:56,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:56,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:47:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:47:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2707, Unknown=5, NotChecked=104, Total=2970 [2022-11-02 20:47:56,861 INFO L87 Difference]: Start difference. First operand 365 states and 629 transitions. Second operand has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) [2022-11-02 20:48:14,275 WARN L234 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:48:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:16,854 INFO L93 Difference]: Finished difference Result 871 states and 1560 transitions. [2022-11-02 20:48:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:48:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) Word has length 86 [2022-11-02 20:48:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:16,865 INFO L225 Difference]: With dead ends: 871 [2022-11-02 20:48:16,865 INFO L226 Difference]: Without dead ends: 778 [2022-11-02 20:48:16,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=461, Invalid=8094, Unknown=5, NotChecked=182, Total=8742 [2022-11-02 20:48:16,868 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 152 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:16,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 933 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2134 Invalid, 0 Unknown, 697 Unchecked, 1.4s Time] [2022-11-02 20:48:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-11-02 20:48:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 650. [2022-11-02 20:48:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 489 states have (on average 1.2269938650306749) internal successors, (600), 489 states have internal predecessors, (600), 54 states have call successors, (54), 32 states have call predecessors, (54), 106 states have return successors, (545), 128 states have call predecessors, (545), 30 states have call successors, (545) [2022-11-02 20:48:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1199 transitions. [2022-11-02 20:48:16,972 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1199 transitions. Word has length 86 [2022-11-02 20:48:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:16,974 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1199 transitions. [2022-11-02 20:48:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) [2022-11-02 20:48:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1199 transitions. [2022-11-02 20:48:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:48:16,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:16,980 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:17,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:17,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:48:17,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash -855775356, now seen corresponding path program 2 times [2022-11-02 20:48:17,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:17,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310984157] [2022-11-02 20:48:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:48:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 20:48:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:19,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 17 proven. 53 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-02 20:48:19,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:19,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310984157] [2022-11-02 20:48:19,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310984157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:19,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131570878] [2022-11-02 20:48:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:48:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:19,015 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:19,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:48:19,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:48:19,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-02 20:48:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:19,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:48:19,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:48:19,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:48:19,618 WARN L855 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_2032 (Array Int Int)) (v_ArrVal_2031 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2031)) (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2032)))) is different from true [2022-11-02 20:48:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:48:19,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:48:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:48:19,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:48:19,656 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:48:19,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:48:19,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:48:19,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:48:20,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:48:20,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:48:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 8 not checked. [2022-11-02 20:48:20,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:21,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131570878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:21,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:48:21,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2022-11-02 20:48:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028729472] [2022-11-02 20:48:21,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:48:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:48:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1364, Unknown=1, NotChecked=74, Total=1560 [2022-11-02 20:48:21,351 INFO L87 Difference]: Start difference. First operand 650 states and 1199 transitions. Second operand has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:48:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:23,456 INFO L93 Difference]: Finished difference Result 755 states and 1340 transitions. [2022-11-02 20:48:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:48:23,459 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) Word has length 84 [2022-11-02 20:48:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:23,465 INFO L225 Difference]: With dead ends: 755 [2022-11-02 20:48:23,466 INFO L226 Difference]: Without dead ends: 686 [2022-11-02 20:48:23,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=365, Invalid=3420, Unknown=1, NotChecked=120, Total=3906 [2022-11-02 20:48:23,468 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 78 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:23,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 507 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1009 Invalid, 0 Unknown, 266 Unchecked, 0.8s Time] [2022-11-02 20:48:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-02 20:48:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 600. [2022-11-02 20:48:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 452 states have (on average 1.2234513274336283) internal successors, (553), 448 states have internal predecessors, (553), 54 states have call successors, (54), 32 states have call predecessors, (54), 93 states have return successors, (459), 119 states have call predecessors, (459), 30 states have call successors, (459) [2022-11-02 20:48:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1066 transitions. [2022-11-02 20:48:23,565 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1066 transitions. Word has length 84 [2022-11-02 20:48:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:23,565 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 1066 transitions. [2022-11-02 20:48:23,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:48:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1066 transitions. [2022-11-02 20:48:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:48:23,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:23,571 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:23,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-02 20:48:23,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:23,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 2 times [2022-11-02 20:48:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377154301] [2022-11-02 20:48:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:48:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:48:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-02 20:48:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:48:25,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377154301] [2022-11-02 20:48:25,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377154301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106880091] [2022-11-02 20:48:25,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:48:25,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:25,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:25,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:48:25,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:48:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-02 20:48:25,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:25,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:48:25,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:48:26,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:48:26,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-02 20:48:26,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:48:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:48:26,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:28,224 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-02 20:48:28,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-11-02 20:48:29,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106880091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:29,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:48:29,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2022-11-02 20:48:29,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395006539] [2022-11-02 20:48:29,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-02 20:48:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-02 20:48:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2022-11-02 20:48:29,097 INFO L87 Difference]: Start difference. First operand 600 states and 1066 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-02 20:48:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:36,015 INFO L93 Difference]: Finished difference Result 893 states and 1845 transitions. [2022-11-02 20:48:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:48:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2022-11-02 20:48:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:36,025 INFO L225 Difference]: With dead ends: 893 [2022-11-02 20:48:36,025 INFO L226 Difference]: Without dead ends: 891 [2022-11-02 20:48:36,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3454 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2022-11-02 20:48:36,029 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 169 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:36,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 395 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-02 20:48:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-02 20:48:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 589. [2022-11-02 20:48:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 445 states have (on average 1.2247191011235956) internal successors, (545), 440 states have internal predecessors, (545), 52 states have call successors, (52), 32 states have call predecessors, (52), 91 states have return successors, (438), 116 states have call predecessors, (438), 28 states have call successors, (438) [2022-11-02 20:48:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1035 transitions. [2022-11-02 20:48:36,147 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1035 transitions. Word has length 72 [2022-11-02 20:48:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:36,150 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 1035 transitions. [2022-11-02 20:48:36,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-02 20:48:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1035 transitions. [2022-11-02 20:48:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-02 20:48:36,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:36,156 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:36,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:48:36,363 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:36,363 INFO L85 PathProgramCache]: Analyzing trace with hash -118617124, now seen corresponding path program 4 times [2022-11-02 20:48:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:36,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446819652] [2022-11-02 20:48:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:48:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:37,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-02 20:48:38,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446819652] [2022-11-02 20:48:38,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446819652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667676090] [2022-11-02 20:48:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:48:38,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:38,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:38,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:48:38,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:48:38,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-02 20:48:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:38,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:48:38,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:48:38,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:48:38,524 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:48:38,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:48:38,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:48:38,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:48:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 20:48:39,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:40,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667676090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:40,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:48:40,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2022-11-02 20:48:40,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629546672] [2022-11-02 20:48:40,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:40,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:48:40,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:40,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:48:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:48:40,500 INFO L87 Difference]: Start difference. First operand 589 states and 1035 transitions. Second operand has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-02 20:48:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:42,477 INFO L93 Difference]: Finished difference Result 902 states and 1638 transitions. [2022-11-02 20:48:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 20:48:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) Word has length 89 [2022-11-02 20:48:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:42,485 INFO L225 Difference]: With dead ends: 902 [2022-11-02 20:48:42,485 INFO L226 Difference]: Without dead ends: 746 [2022-11-02 20:48:42,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=338, Invalid=3568, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 20:48:42,488 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 81 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:42,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 581 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 830 Invalid, 0 Unknown, 215 Unchecked, 0.6s Time] [2022-11-02 20:48:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-02 20:48:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 642. [2022-11-02 20:48:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.2288659793814434) internal successors, (596), 482 states have internal predecessors, (596), 52 states have call successors, (52), 32 states have call predecessors, (52), 104 states have return successors, (519), 127 states have call predecessors, (519), 28 states have call successors, (519) [2022-11-02 20:48:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1167 transitions. [2022-11-02 20:48:42,585 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1167 transitions. Word has length 89 [2022-11-02 20:48:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:42,586 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 1167 transitions. [2022-11-02 20:48:42,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-02 20:48:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1167 transitions. [2022-11-02 20:48:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-02 20:48:42,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:42,592 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:42,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:42,807 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2022-11-02 20:48:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:42,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116053159] [2022-11-02 20:48:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:42,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:48:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:44,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:45,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:48:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-02 20:48:45,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116053159] [2022-11-02 20:48:45,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116053159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702312382] [2022-11-02 20:48:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:48:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:45,231 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:45,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:48:45,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-02 20:48:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-02 20:48:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:46,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:48:47,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:48:47,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2022-11-02 20:48:47,503 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:48:47,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2022-11-02 20:48:47,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:48:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 34 proven. 75 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-02 20:48:47,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:48:49,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702312382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:49,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:48:49,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 59 [2022-11-02 20:48:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683577846] [2022-11-02 20:48:49,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:48:49,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-02 20:48:49,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-02 20:48:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5189, Unknown=0, NotChecked=0, Total=5402 [2022-11-02 20:48:49,946 INFO L87 Difference]: Start difference. First operand 642 states and 1167 transitions. Second operand has 59 states, 46 states have (on average 1.891304347826087) internal successors, (87), 42 states have internal predecessors, (87), 19 states have call successors, (28), 8 states have call predecessors, (28), 12 states have return successors, (21), 18 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-02 20:48:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:57,234 INFO L93 Difference]: Finished difference Result 1020 states and 2037 transitions. [2022-11-02 20:48:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:48:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 46 states have (on average 1.891304347826087) internal successors, (87), 42 states have internal predecessors, (87), 19 states have call successors, (28), 8 states have call predecessors, (28), 12 states have return successors, (21), 18 states have call predecessors, (21), 13 states have call successors, (21) Word has length 99 [2022-11-02 20:48:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:57,244 INFO L225 Difference]: With dead ends: 1020 [2022-11-02 20:48:57,245 INFO L226 Difference]: Without dead ends: 1018 [2022-11-02 20:48:57,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3417 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1196, Invalid=15834, Unknown=0, NotChecked=0, Total=17030 [2022-11-02 20:48:57,248 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 189 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:57,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 407 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2680 Invalid, 0 Unknown, 563 Unchecked, 1.9s Time] [2022-11-02 20:48:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-02 20:48:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 782. [2022-11-02 20:48:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 586 states have (on average 1.226962457337884) internal successors, (719), 598 states have internal predecessors, (719), 58 states have call successors, (58), 36 states have call predecessors, (58), 137 states have return successors, (678), 147 states have call predecessors, (678), 28 states have call successors, (678) [2022-11-02 20:48:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1455 transitions. [2022-11-02 20:48:57,382 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1455 transitions. Word has length 99 [2022-11-02 20:48:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:57,382 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1455 transitions. [2022-11-02 20:48:57,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 46 states have (on average 1.891304347826087) internal successors, (87), 42 states have internal predecessors, (87), 19 states have call successors, (28), 8 states have call predecessors, (28), 12 states have return successors, (21), 18 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-02 20:48:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1455 transitions. [2022-11-02 20:48:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-02 20:48:57,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:57,390 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:57,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:57,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240ded1f-e759-4106-b1e1-27d6275c1e1e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:57,618 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1679039551, now seen corresponding path program 3 times [2022-11-02 20:48:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:57,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029905302] [2022-11-02 20:48:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:58,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:59,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:48:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat