./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/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_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/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_a66370a3-2e4d-4141-b273-22f17b3060f3/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 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 --- 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 20:39:39,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:39,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:39,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:39,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:39,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:39,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:39,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:39,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:39,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:39,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:39,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:39,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:39,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:39,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:39,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:39,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:39,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:39,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:39,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:39,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:39,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:39,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:39,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:39,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:39,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:39,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:39,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:39,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:39,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:39,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:39,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:39,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:39,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:39,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:39,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:39,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:39,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:39,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:39,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:39,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:39,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:39:39,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:39,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:39,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:39,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:39,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:39,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:39,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:39,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:39,646 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:39,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:39,648 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:39,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:39,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:39,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:39,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:39:39,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:39,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:39:39,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:39,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:39:39,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:39,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:39:39,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:39,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:39,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:39,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:39,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:39,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:39,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:39:39,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:39:39,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:39:39,652 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:39:39,652 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:39:39,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:39:39,653 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_a66370a3-2e4d-4141-b273-22f17b3060f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 [2022-11-02 20:39:39,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:39,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:39,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:39,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:39,941 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:39,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2022-11-02 20:39:40,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/data/cd7a7fb8f/3d5bab2f21ea44f8a687a335c28da202/FLAG53e71cd09 [2022-11-02 20:39:40,466 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:40,467 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2022-11-02 20:39:40,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/data/cd7a7fb8f/3d5bab2f21ea44f8a687a335c28da202/FLAG53e71cd09 [2022-11-02 20:39:40,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/data/cd7a7fb8f/3d5bab2f21ea44f8a687a335c28da202 [2022-11-02 20:39:40,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:40,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:40,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:40,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:40,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:40,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:40" (1/1) ... [2022-11-02 20:39:40,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14db880b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:40, skipping insertion in model container [2022-11-02 20:39:40,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:40" (1/1) ... [2022-11-02 20:39:40,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:40,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:41,088 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_a66370a3-2e4d-4141-b273-22f17b3060f3/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2022-11-02 20:39:41,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:41,113 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:39:41,127 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_a66370a3-2e4d-4141-b273-22f17b3060f3/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2022-11-02 20:39:41,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:41,148 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:39:41,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41 WrapperNode [2022-11-02 20:39:41,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:41,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:41,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:39:41,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:39:41,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,197 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-02 20:39:41,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:41,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:39:41,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:39:41,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:39:41,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,228 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:39:41,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:39:41,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:39:41,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:39:41,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (1/1) ... [2022-11-02 20:39:41,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:41,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:39:41,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:39:41,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:39:41,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:39:41,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:39:41,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:39:41,394 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:39:41,396 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:39:41,522 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:39:41,528 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:39:41,528 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:39:41,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:41 BoogieIcfgContainer [2022-11-02 20:39:41,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:39:41,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:39:41,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:39:41,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:39:41,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:39:40" (1/3) ... [2022-11-02 20:39:41,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc5b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:41, skipping insertion in model container [2022-11-02 20:39:41,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:41" (2/3) ... [2022-11-02 20:39:41,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc5b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:41, skipping insertion in model container [2022-11-02 20:39:41,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:41" (3/3) ... [2022-11-02 20:39:41,539 INFO L112 eAbstractionObserver]: Analyzing ICFG nested-3.c [2022-11-02 20:39:41,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:39:41,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:39:41,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:41,625 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;@3895b6c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:41,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:39:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:39:41,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:41,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:41,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2022-11-02 20:39:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:41,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059470424] [2022-11-02 20:39:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:41,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:41,882 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 20:39:41,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:41,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059470424] [2022-11-02 20:39:41,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059470424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:41,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:41,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:39:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896133659] [2022-11-02 20:39:41,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:41,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:41,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:41,928 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:41,973 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2022-11-02 20:39:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 20:39:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:41,983 INFO L225 Difference]: With dead ends: 31 [2022-11-02 20:39:41,983 INFO L226 Difference]: Without dead ends: 17 [2022-11-02 20:39:41,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:39:41,989 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:41,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-02 20:39:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2022-11-02 20:39:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-02 20:39:42,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-11-02 20:39:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:42,039 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-02 20:39:42,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-02 20:39:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:39:42,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:42,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:42,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:39:42,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:42,042 INFO L85 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2022-11-02 20:39:42,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:42,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073811323] [2022-11-02 20:39:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:42,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073811323] [2022-11-02 20:39:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073811323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892860401] [2022-11-02 20:39:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:42,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:42,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:42,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:39:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:39:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:42,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:42,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892860401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:42,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:42,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 20:39:42,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117764073] [2022-11-02 20:39:42,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:42,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:42,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:42,300 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:42,332 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-11-02 20:39:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:39:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:42,334 INFO L225 Difference]: With dead ends: 33 [2022-11-02 20:39:42,334 INFO L226 Difference]: Without dead ends: 21 [2022-11-02 20:39:42,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:42,336 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:42,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-02 20:39:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-02 20:39:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-02 20:39:42,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2022-11-02 20:39:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:42,342 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-02 20:39:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-02 20:39:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:39:42,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:42,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:42,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:42,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2022-11-02 20:39:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:42,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779880230] [2022-11-02 20:39:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:42,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:42,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779880230] [2022-11-02 20:39:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779880230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074854628] [2022-11-02 20:39:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:42,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:42,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:39:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:39:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:42,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074854628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:42,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:42,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:39:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716678582] [2022-11-02 20:39:42,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:42,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:39:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:39:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:42,772 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:42,821 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-11-02 20:39:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:39:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:42,823 INFO L225 Difference]: With dead ends: 38 [2022-11-02 20:39:42,823 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:39:42,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:42,825 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:42,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:39:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 20:39:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-02 20:39:42,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2022-11-02 20:39:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:42,831 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-02 20:39:42,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-02 20:39:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:39:42,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:42,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:42,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:43,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:43,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:43,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2114699077, now seen corresponding path program 2 times [2022-11-02 20:39:43,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:43,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140224546] [2022-11-02 20:39:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:39:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140224546] [2022-11-02 20:39:43,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140224546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:43,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739426543] [2022-11-02 20:39:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:43,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:43,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:43,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:39:43,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:39:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:43,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:39:43,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739426543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:43,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:43,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 20:39:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919560667] [2022-11-02 20:39:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:39:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:39:43,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:39:43,453 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:43,668 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2022-11-02 20:39:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:39:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 20:39:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:43,675 INFO L225 Difference]: With dead ends: 101 [2022-11-02 20:39:43,677 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:39:43,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:39:43,682 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:43,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 53 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:39:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-11-02 20:39:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-11-02 20:39:43,709 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 21 [2022-11-02 20:39:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:43,711 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-11-02 20:39:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-11-02 20:39:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:39:43,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:43,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:43,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:43,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1372768635, now seen corresponding path program 1 times [2022-11-02 20:39:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742420889] [2022-11-02 20:39:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:43,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:39:44,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:44,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742420889] [2022-11-02 20:39:44,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742420889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:44,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:44,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:39:44,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162074206] [2022-11-02 20:39:44,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:44,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:39:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:44,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:39:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:44,031 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:44,091 INFO L93 Difference]: Finished difference Result 177 states and 228 transitions. [2022-11-02 20:39:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:39:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 20:39:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:44,093 INFO L225 Difference]: With dead ends: 177 [2022-11-02 20:39:44,096 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:39:44,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:44,098 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:44,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:39:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2022-11-02 20:39:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 86 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-11-02 20:39:44,115 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 21 [2022-11-02 20:39:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:44,115 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-11-02 20:39:44,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-11-02 20:39:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:39:44,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:44,117 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:44,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:39:44,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 2 times [2022-11-02 20:39:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:44,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187003613] [2022-11-02 20:39:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:44,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187003613] [2022-11-02 20:39:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187003613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007098083] [2022-11-02 20:39:44,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:44,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:44,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:44,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:39:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:39:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:44,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:44,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007098083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:44,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:44,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-02 20:39:44,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503268083] [2022-11-02 20:39:44,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:44,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:39:44,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:44,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:39:44,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:39:44,424 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:44,549 INFO L93 Difference]: Finished difference Result 295 states and 395 transitions. [2022-11-02 20:39:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:39:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 20:39:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:44,555 INFO L225 Difference]: With dead ends: 295 [2022-11-02 20:39:44,556 INFO L226 Difference]: Without dead ends: 210 [2022-11-02 20:39:44,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:39:44,559 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:44,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-02 20:39:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2022-11-02 20:39:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.2164948453608246) internal successors, (236), 194 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2022-11-02 20:39:44,615 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 21 [2022-11-02 20:39:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:44,616 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2022-11-02 20:39:44,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2022-11-02 20:39:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:39:44,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:44,618 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:44,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:44,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:44,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1505496997, now seen corresponding path program 3 times [2022-11-02 20:39:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:44,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987313781] [2022-11-02 20:39:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987313781] [2022-11-02 20:39:45,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987313781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335157688] [2022-11-02 20:39:45,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:39:45,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:45,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:45,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:39:45,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:39:45,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:39:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-02 20:39:45,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335157688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:45,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:45,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-11-02 20:39:45,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105488119] [2022-11-02 20:39:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:39:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:39:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:39:45,552 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:45,667 INFO L93 Difference]: Finished difference Result 509 states and 608 transitions. [2022-11-02 20:39:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:39:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 20:39:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:45,670 INFO L225 Difference]: With dead ends: 509 [2022-11-02 20:39:45,670 INFO L226 Difference]: Without dead ends: 507 [2022-11-02 20:39:45,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:39:45,672 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:45,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:39:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-02 20:39:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 319. [2022-11-02 20:39:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.1855345911949686) internal successors, (377), 318 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 377 transitions. [2022-11-02 20:39:45,734 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 377 transitions. Word has length 39 [2022-11-02 20:39:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:45,735 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 377 transitions. [2022-11-02 20:39:45,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 377 transitions. [2022-11-02 20:39:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:39:45,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:45,744 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:45,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:45,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:39:45,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash 557414361, now seen corresponding path program 1 times [2022-11-02 20:39:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:45,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101405461] [2022-11-02 20:39:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:45,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 118 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:39:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101405461] [2022-11-02 20:39:46,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101405461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181125088] [2022-11-02 20:39:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:46,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:46,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:46,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:39:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:46,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:39:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:46,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:46,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181125088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:46,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:46,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-11-02 20:39:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332137593] [2022-11-02 20:39:46,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:46,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:39:46,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:39:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:39:46,789 INFO L87 Difference]: Start difference. First operand 319 states and 377 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:54,822 INFO L93 Difference]: Finished difference Result 2329 states and 2952 transitions. [2022-11-02 20:39:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-02 20:39:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 20:39:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:54,829 INFO L225 Difference]: With dead ends: 2329 [2022-11-02 20:39:54,830 INFO L226 Difference]: Without dead ends: 2122 [2022-11-02 20:39:54,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18399 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11743, Invalid=35999, Unknown=0, NotChecked=0, Total=47742 [2022-11-02 20:39:54,847 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1037 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:54,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 99 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:39:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-11-02 20:39:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 516. [2022-11-02 20:39:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.1805825242718446) internal successors, (608), 515 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 608 transitions. [2022-11-02 20:39:54,901 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 608 transitions. Word has length 39 [2022-11-02 20:39:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:54,901 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 608 transitions. [2022-11-02 20:39:54,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:39:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 608 transitions. [2022-11-02 20:39:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:39:54,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:54,903 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:54,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:55,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:55,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -244493731, now seen corresponding path program 2 times [2022-11-02 20:39:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:55,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534189040] [2022-11-02 20:39:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:55,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534189040] [2022-11-02 20:39:55,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534189040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748676479] [2022-11-02 20:39:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:55,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:55,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:39:55,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:39:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:39:55,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:55,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:56,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748676479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:56,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:56,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 52 [2022-11-02 20:39:56,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592284691] [2022-11-02 20:39:56,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:56,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 20:39:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 20:39:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1512, Unknown=0, NotChecked=0, Total=2652 [2022-11-02 20:39:56,834 INFO L87 Difference]: Start difference. First operand 516 states and 608 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:00,361 INFO L93 Difference]: Finished difference Result 3286 states and 4211 transitions. [2022-11-02 20:40:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-02 20:40:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-02 20:40:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:00,370 INFO L225 Difference]: With dead ends: 3286 [2022-11-02 20:40:00,370 INFO L226 Difference]: Without dead ends: 2982 [2022-11-02 20:40:00,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4898 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6547, Invalid=13759, Unknown=0, NotChecked=0, Total=20306 [2022-11-02 20:40:00,379 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:00,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 76 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:40:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-11-02 20:40:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1331. [2022-11-02 20:40:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 1.2060150375939849) internal successors, (1604), 1330 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1604 transitions. [2022-11-02 20:40:00,504 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1604 transitions. Word has length 75 [2022-11-02 20:40:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:00,506 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1604 transitions. [2022-11-02 20:40:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1604 transitions. [2022-11-02 20:40:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-02 20:40:00,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:00,509 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:00,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:00,725 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash 176530048, now seen corresponding path program 1 times [2022-11-02 20:40:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:00,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484707124] [2022-11-02 20:40:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-11-02 20:40:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484707124] [2022-11-02 20:40:00,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484707124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:00,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:00,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:40:00,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732481731] [2022-11-02 20:40:00,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:00,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:00,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:00,897 INFO L87 Difference]: Start difference. First operand 1331 states and 1604 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:01,057 INFO L93 Difference]: Finished difference Result 2230 states and 2713 transitions. [2022-11-02 20:40:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-02 20:40:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:01,063 INFO L225 Difference]: With dead ends: 2230 [2022-11-02 20:40:01,063 INFO L226 Difference]: Without dead ends: 1357 [2022-11-02 20:40:01,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:01,065 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:01,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-11-02 20:40:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1327. [2022-11-02 20:40:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.2036199095022624) internal successors, (1596), 1326 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1596 transitions. [2022-11-02 20:40:01,185 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1596 transitions. Word has length 144 [2022-11-02 20:40:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:01,186 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1596 transitions. [2022-11-02 20:40:01,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1596 transitions. [2022-11-02 20:40:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-02 20:40:01,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:01,188 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:01,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:40:01,188 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2130462941, now seen corresponding path program 3 times [2022-11-02 20:40:01,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836992548] [2022-11-02 20:40:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:02,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836992548] [2022-11-02 20:40:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836992548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657411740] [2022-11-02 20:40:02,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:40:02,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:02,982 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:02,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:40:03,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:40:03,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:40:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-11-02 20:40:03,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:40:03,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657411740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:03,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:40:03,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [49] total 55 [2022-11-02 20:40:03,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338552968] [2022-11-02 20:40:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:03,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:40:03,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:03,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:40:03,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1778, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 20:40:03,811 INFO L87 Difference]: Start difference. First operand 1327 states and 1596 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:04,131 INFO L93 Difference]: Finished difference Result 1784 states and 2117 transitions. [2022-11-02 20:40:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:40:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-02 20:40:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:04,138 INFO L225 Difference]: With dead ends: 1784 [2022-11-02 20:40:04,138 INFO L226 Difference]: Without dead ends: 1782 [2022-11-02 20:40:04,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1201, Invalid=1991, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:40:04,140 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:04,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-11-02 20:40:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1327. [2022-11-02 20:40:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.2036199095022624) internal successors, (1596), 1326 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1596 transitions. [2022-11-02 20:40:04,309 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1596 transitions. Word has length 147 [2022-11-02 20:40:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:04,309 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1596 transitions. [2022-11-02 20:40:04,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1596 transitions. [2022-11-02 20:40:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-02 20:40:04,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:04,319 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:04,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:04,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:40:04,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 245147366, now seen corresponding path program 1 times [2022-11-02 20:40:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:04,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003375407] [2022-11-02 20:40:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-11-02 20:40:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003375407] [2022-11-02 20:40:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003375407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853441711] [2022-11-02 20:40:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:06,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:06,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:40:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:06,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:40:06,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-11-02 20:40:07,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12201 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2022-11-02 20:40:10,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853441711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:10,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:10,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-11-02 20:40:10,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065717586] [2022-11-02 20:40:10,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:10,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-02 20:40:10,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-02 20:40:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2022-11-02 20:40:10,083 INFO L87 Difference]: Start difference. First operand 1327 states and 1596 transitions. Second operand has 95 states, 95 states have (on average 3.0842105263157893) internal successors, (293), 95 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:12,155 INFO L93 Difference]: Finished difference Result 10053 states and 11687 transitions. [2022-11-02 20:40:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-02 20:40:12,157 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0842105263157893) internal successors, (293), 95 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2022-11-02 20:40:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:12,185 INFO L225 Difference]: With dead ends: 10053 [2022-11-02 20:40:12,185 INFO L226 Difference]: Without dead ends: 9165 [2022-11-02 20:40:12,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2022-11-02 20:40:12,193 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 729 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:12,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 32 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:40:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2022-11-02 20:40:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 2267. [2022-11-02 20:40:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 1.174315975286849) internal successors, (2661), 2266 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2661 transitions. [2022-11-02 20:40:12,782 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2661 transitions. Word has length 286 [2022-11-02 20:40:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:12,782 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 2661 transitions. [2022-11-02 20:40:12,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0842105263157893) internal successors, (293), 95 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2661 transitions. [2022-11-02 20:40:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-11-02 20:40:12,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:12,809 INFO L195 NwaCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:12,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:13,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:13,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash 540978050, now seen corresponding path program 2 times [2022-11-02 20:40:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:13,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76616395] [2022-11-02 20:40:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-11-02 20:40:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:21,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76616395] [2022-11-02 20:40:21,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76616395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830693077] [2022-11-02 20:40:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:40:21,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:21,338 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:21,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:40:21,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:40:21,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-02 20:40:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-11-02 20:40:22,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50882 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12654 trivial. 0 not checked. [2022-11-02 20:40:32,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830693077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:32,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:32,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-02 20:40:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477671579] [2022-11-02 20:40:32,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-11-02 20:40:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-11-02 20:40:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2022-11-02 20:40:32,985 INFO L87 Difference]: Start difference. First operand 2267 states and 2661 transitions. Second operand has 189 states, 189 states have (on average 3.0423280423280423) internal successors, (575), 189 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:42,081 INFO L93 Difference]: Finished difference Result 18863 states and 21993 transitions. [2022-11-02 20:40:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-02 20:40:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 3.0423280423280423) internal successors, (575), 189 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 568 [2022-11-02 20:40:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:42,125 INFO L225 Difference]: With dead ends: 18863 [2022-11-02 20:40:42,125 INFO L226 Difference]: Without dead ends: 17437 [2022-11-02 20:40:42,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=17766, Invalid=17766, Unknown=0, NotChecked=0, Total=35532 [2022-11-02 20:40:42,135 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1429 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:42,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 47 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:40:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2022-11-02 20:40:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 4523. [2022-11-02 20:40:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 1.170499778858912) internal successors, (5293), 4522 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 5293 transitions. [2022-11-02 20:40:43,699 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 5293 transitions. Word has length 568 [2022-11-02 20:40:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:43,700 INFO L495 AbstractCegarLoop]: Abstraction has 4523 states and 5293 transitions. [2022-11-02 20:40:43,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 3.0423280423280423) internal successors, (575), 189 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 5293 transitions. [2022-11-02 20:40:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1133 [2022-11-02 20:40:43,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:43,760 INFO L195 NwaCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:43,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:43,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:40:43,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:43,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1619735746, now seen corresponding path program 3 times [2022-11-02 20:40:43,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:43,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659640310] [2022-11-02 20:40:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:43,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 104162 proven. 51801 refuted. 0 times theorem prover too weak. 51805 trivial. 0 not checked. [2022-11-02 20:41:18,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:18,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659640310] [2022-11-02 20:41:18,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659640310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:18,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035364776] [2022-11-02 20:41:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:41:18,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:18,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:18,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:41:18,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:41:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:41:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 556 proven. 104166 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-11-02 20:41:23,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 207768 backedges. 3 proven. 1116 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-11-02 20:41:25,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035364776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:25,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:25,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [189, 9, 7] total 200 [2022-11-02 20:41:25,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695853714] [2022-11-02 20:41:25,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:25,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-11-02 20:41:25,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:25,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-11-02 20:41:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18183, Invalid=21617, Unknown=0, NotChecked=0, Total=39800 [2022-11-02 20:41:25,882 INFO L87 Difference]: Start difference. First operand 4523 states and 5293 transitions. Second operand has 200 states, 200 states have (on average 3.095) internal successors, (619), 200 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:02,393 INFO L93 Difference]: Finished difference Result 12501 states and 14502 transitions. [2022-11-02 20:43:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-11-02 20:43:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 3.095) internal successors, (619), 200 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1132 [2022-11-02 20:43:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:02,396 INFO L225 Difference]: With dead ends: 12501 [2022-11-02 20:43:02,396 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 20:43:02,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3023 GetRequests, 2253 SyntacticMatches, 1 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165771 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=146170, Invalid=447500, Unknown=0, NotChecked=0, Total=593670 [2022-11-02 20:43:02,447 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5549 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 1154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5549 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1154 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:02,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5549 Valid, 39 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1154 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-02 20:43:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 20:43:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 20:43:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 20:43:02,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1132 [2022-11-02 20:43:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:02,450 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:43:02,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 3.095) internal successors, (619), 200 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 20:43:02,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 20:43:02,453 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 20:43:02,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:02,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66370a3-2e4d-4141-b273-22f17b3060f3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:43:02,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.