./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.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_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/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_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/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_1fa33ee1-f74d-44e3-b996-35234dca6da2/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 ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 --- 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 20:44:38,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:44:38,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:44:38,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:44:38,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:44:38,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:44:38,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:44:38,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:44:38,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:44:38,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:44:38,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:44:38,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:44:38,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:44:38,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:44:38,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:44:38,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:44:38,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:44:38,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:44:38,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:44:38,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:44:38,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:44:38,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:44:38,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:44:38,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:44:38,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:44:38,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:44:38,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:44:38,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:44:38,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:44:38,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:44:38,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:44:38,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:44:38,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:44:38,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:44:38,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:44:38,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:44:38,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:44:38,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:44:38,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:44:38,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:44:38,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:44:38,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:44:38,496 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:44:38,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:44:38,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:44:38,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:44:38,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:44:38,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:44:38,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:44:38,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:44:38,502 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:44:38,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:44:38,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:44:38,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:44:38,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:44:38,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:44:38,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:44:38,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:44:38,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:44:38,506 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:44:38,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:44:38,506 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:44:38,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:44:38,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:44:38,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:44:38,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:44:38,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:44:38,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:44:38,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:44:38,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:44:38,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:44:38,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:44:38,510 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:44:38,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:44:38,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:44:38,511 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_1fa33ee1-f74d-44e3-b996-35234dca6da2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf8b0d6633d593d56778eaf5218135ab2be92cae14e75cdda2462494f96410 [2022-11-02 20:44:38,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:44:38,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:44:38,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:44:38,842 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:44:38,843 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:44:38,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2022-11-02 20:44:38,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/data/d5382e8c2/88841a8998f14ba5ba2f918106d6f63b/FLAGf7a69de6a [2022-11-02 20:44:39,438 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:44:39,439 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2022-11-02 20:44:39,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/data/d5382e8c2/88841a8998f14ba5ba2f918106d6f63b/FLAGf7a69de6a [2022-11-02 20:44:39,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/data/d5382e8c2/88841a8998f14ba5ba2f918106d6f63b [2022-11-02 20:44:39,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:44:39,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:44:39,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:44:39,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:44:39,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:44:39,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:44:39" (1/1) ... [2022-11-02 20:44:39,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f234f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:39, skipping insertion in model container [2022-11-02 20:44:39,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:44:39" (1/1) ... [2022-11-02 20:44:39,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:44:39,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:44:40,080 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_1fa33ee1-f74d-44e3-b996-35234dca6da2/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2022-11-02 20:44:40,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:44:40,145 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:44:40,163 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_1fa33ee1-f74d-44e3-b996-35234dca6da2/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2022-11-02 20:44:40,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:44:40,194 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:44:40,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40 WrapperNode [2022-11-02 20:44:40,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:44:40,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:44:40,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:44:40,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:44:40,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,249 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-02 20:44:40,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:44:40,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:44:40,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:44:40,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:44:40,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,277 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:44:40,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:44:40,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:44:40,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:44:40,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (1/1) ... [2022-11-02 20:44:40,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:44:40,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:40,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:44:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:44:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:44:40,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:44:40,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:44:40,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:44:40,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:44:40,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:44:40,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:44:40,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:44:40,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:44:40,449 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:44:40,610 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:44:40,615 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:44:40,615 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:44:40,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:40 BoogieIcfgContainer [2022-11-02 20:44:40,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:44:40,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:44:40,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:44:40,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:44:40,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:44:39" (1/3) ... [2022-11-02 20:44:40,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da31d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:44:40, skipping insertion in model container [2022-11-02 20:44:40,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:40" (2/3) ... [2022-11-02 20:44:40,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da31d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:44:40, skipping insertion in model container [2022-11-02 20:44:40,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:40" (3/3) ... [2022-11-02 20:44:40,627 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2022-11-02 20:44:40,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:44:40,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:44:40,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:40,730 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;@45133691, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:40,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:44:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 20:44:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:44:40,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:40,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:40,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-11-02 20:44:40,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:40,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569498462] [2022-11-02 20:44:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:40,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:40,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569498462] [2022-11-02 20:44:40,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:44:40,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807769716] [2022-11-02 20:44:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:40,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:40,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:40,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:44:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:44:41,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-02 20:44:41,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:41,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807769716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:41,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:41,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:44:41,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813249847] [2022-11-02 20:44:41,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:41,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:44:41,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:41,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:44:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:41,199 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:44:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:41,261 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-11-02 20:44:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:44:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-02 20:44:41,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:41,286 INFO L225 Difference]: With dead ends: 67 [2022-11-02 20:44:41,286 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:44:41,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:41,307 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:41,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:44:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-02 20:44:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:44:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-02 20:44:41,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-11-02 20:44:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:41,362 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-02 20:44:41,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:44:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-02 20:44:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:44:41,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:41,365 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:41,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:44:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:44:41,571 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-11-02 20:44:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:41,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542961626] [2022-11-02 20:44:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:41,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:41,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922116211] [2022-11-02 20:44:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:41,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:41,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:41,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:44:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:44:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:44:41,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:44:41,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:41,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542961626] [2022-11-02 20:44:41,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922116211] [2022-11-02 20:44:41,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922116211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:41,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:41,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-02 20:44:41,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535585815] [2022-11-02 20:44:41,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:42,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:44:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:44:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:44:42,003 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:44:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:42,162 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-11-02 20:44:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-11-02 20:44:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:42,164 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:44:42,165 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 20:44:42,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:44:42,166 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:42,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:44:42,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 20:44:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-02 20:44:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:44:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-02 20:44:42,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-11-02 20:44:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:42,179 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-02 20:44:42,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:44:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-02 20:44:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:44:42,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:42,181 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:42,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-02 20:44:42,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-11-02 20:44:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786231808] [2022-11-02 20:44:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:42,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:42,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168341197] [2022-11-02 20:44:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:42,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:42,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:44:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:44:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:44:42,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:44:42,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786231808] [2022-11-02 20:44:42,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168341197] [2022-11-02 20:44:42,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168341197] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:42,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:44:42,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-11-02 20:44:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252876813] [2022-11-02 20:44:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:42,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:42,704 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:44:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:42,764 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-02 20:44:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:44:42,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-02 20:44:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:42,766 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:44:42,766 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:44:42,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:44:42,768 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:42,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:44:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-02 20:44:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:44:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-02 20:44:42,779 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-11-02 20:44:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:42,780 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-02 20:44:42,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:44:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-02 20:44:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:44:42,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:42,782 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:42,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:42,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:42,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-11-02 20:44:42,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:42,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586324146] [2022-11-02 20:44:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:43,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:43,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251390945] [2022-11-02 20:44:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:43,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:43,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:43,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:44:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:44:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:44:43,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 20:44:43,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586324146] [2022-11-02 20:44:43,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251390945] [2022-11-02 20:44:43,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251390945] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:43,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:44:43,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2022-11-02 20:44:43,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154004413] [2022-11-02 20:44:43,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:43,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:44:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:44:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:44:43,770 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:44:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:43,874 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-11-02 20:44:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-02 20:44:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:43,882 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:44:43,882 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 20:44:43,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:43,888 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:43,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:44:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 20:44:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-02 20:44:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 20:44:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-02 20:44:43,907 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-11-02 20:44:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:43,908 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-02 20:44:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:44:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-02 20:44:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:44:43,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:43,910 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:43,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:44,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:44,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-11-02 20:44:44,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:44,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236053922] [2022-11-02 20:44:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:44,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:44,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191204029] [2022-11-02 20:44:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:44,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:44,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:44:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:44:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:44:44,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:44:44,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236053922] [2022-11-02 20:44:44,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:44,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191204029] [2022-11-02 20:44:44,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191204029] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:44,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:44:44,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2022-11-02 20:44:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239748097] [2022-11-02 20:44:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:44:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:44:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:44:44,806 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:44:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:44,921 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-02 20:44:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2022-11-02 20:44:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:44,925 INFO L225 Difference]: With dead ends: 54 [2022-11-02 20:44:44,925 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 20:44:44,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:44,927 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:44,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 152 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:44:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 20:44:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-02 20:44:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 20:44:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-02 20:44:44,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-11-02 20:44:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:44,960 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-02 20:44:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:44:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-02 20:44:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:44:44,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:44,970 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:45,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 20:44:45,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:45,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-11-02 20:44:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:45,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004222941] [2022-11-02 20:44:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:45,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:45,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611936450] [2022-11-02 20:44:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:45,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:45,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:45,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:44:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:44:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:44:45,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:45,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:45,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004222941] [2022-11-02 20:44:45,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:45,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611936450] [2022-11-02 20:44:45,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611936450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:45,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:44:45,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-02 20:44:45,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694351114] [2022-11-02 20:44:45,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:44:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:44:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:44:45,819 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-02 20:44:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:46,112 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-02 20:44:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:44:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-11-02 20:44:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:46,114 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:44:46,114 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 20:44:46,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:44:46,115 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:46,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 107 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 20:44:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-02 20:44:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-02 20:44:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-02 20:44:46,139 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-11-02 20:44:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:46,140 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-02 20:44:46,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-02 20:44:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-02 20:44:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:44:46,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:46,145 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:46,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:46,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-11-02 20:44:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:46,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49417440] [2022-11-02 20:44:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:46,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:46,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372211797] [2022-11-02 20:44:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:46,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:46,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:46,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:46,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:44:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:44:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:44:46,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:44:46,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49417440] [2022-11-02 20:44:46,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372211797] [2022-11-02 20:44:46,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372211797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:46,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:46,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-02 20:44:46,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260118968] [2022-11-02 20:44:46,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:46,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:44:46,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:44:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:44:46,647 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:44:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:46,917 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-11-02 20:44:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:44:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-11-02 20:44:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:46,920 INFO L225 Difference]: With dead ends: 102 [2022-11-02 20:44:46,920 INFO L226 Difference]: Without dead ends: 94 [2022-11-02 20:44:46,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:46,921 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:46,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 195 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-02 20:44:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-02 20:44:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-02 20:44:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-11-02 20:44:46,951 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-11-02 20:44:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:46,951 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-11-02 20:44:46,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:44:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-11-02 20:44:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:44:46,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:46,953 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:46,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:47,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:47,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-11-02 20:44:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:47,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90021426] [2022-11-02 20:44:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:47,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:47,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127715806] [2022-11-02 20:44:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:47,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:47,191 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:47,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:44:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:44:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-02 20:44:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-02 20:44:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90021426] [2022-11-02 20:44:47,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127715806] [2022-11-02 20:44:47,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127715806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:47,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:47,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-11-02 20:44:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746922476] [2022-11-02 20:44:47,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:47,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:44:47,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:44:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:44:47,628 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-02 20:44:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:48,186 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-11-02 20:44:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:44:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2022-11-02 20:44:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:48,193 INFO L225 Difference]: With dead ends: 128 [2022-11-02 20:44:48,193 INFO L226 Difference]: Without dead ends: 124 [2022-11-02 20:44:48,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:44:48,194 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 33 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:48,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 257 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:44:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-02 20:44:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-11-02 20:44:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:44:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-11-02 20:44:48,256 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-11-02 20:44:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:48,257 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-11-02 20:44:48,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-02 20:44:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-11-02 20:44:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:44:48,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:48,259 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:48,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:48,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:48,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-11-02 20:44:48,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:48,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060537312] [2022-11-02 20:44:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:48,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683487946] [2022-11-02 20:44:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:44:48,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:48,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:48,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:44:48,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:44:48,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:48,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:44:48,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-02 20:44:49,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-02 20:44:49,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:49,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060537312] [2022-11-02 20:44:49,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:49,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683487946] [2022-11-02 20:44:49,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683487946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:49,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:49,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-11-02 20:44:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103098836] [2022-11-02 20:44:49,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:49,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:44:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:44:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:49,620 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-02 20:44:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:54,055 INFO L93 Difference]: Finished difference Result 234 states and 348 transitions. [2022-11-02 20:44:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:44:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 76 [2022-11-02 20:44:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:54,064 INFO L225 Difference]: With dead ends: 234 [2022-11-02 20:44:54,065 INFO L226 Difference]: Without dead ends: 232 [2022-11-02 20:44:54,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:44:54,070 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:54,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 272 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-02 20:44:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-02 20:44:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2022-11-02 20:44:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 112 states have internal predecessors, (134), 81 states have call successors, (81), 10 states have call predecessors, (81), 10 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-02 20:44:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-11-02 20:44:54,164 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 76 [2022-11-02 20:44:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:54,165 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-11-02 20:44:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-02 20:44:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-11-02 20:44:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:44:54,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:54,167 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:54,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:54,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:54,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-11-02 20:44:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:54,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672664190] [2022-11-02 20:44:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:54,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:54,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230931860] [2022-11-02 20:44:54,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:44:54,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:54,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:54,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:54,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:44:54,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:44:54,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:44:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:44:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:44:54,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:55,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:55,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672664190] [2022-11-02 20:44:55,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:55,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230931860] [2022-11-02 20:44:55,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230931860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:55,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:44:55,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-02 20:44:55,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366164762] [2022-11-02 20:44:55,039 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:55,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:44:55,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:44:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:44:55,041 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:44:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:55,637 INFO L93 Difference]: Finished difference Result 213 states and 305 transitions. [2022-11-02 20:44:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:44:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2022-11-02 20:44:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:55,639 INFO L225 Difference]: With dead ends: 213 [2022-11-02 20:44:55,640 INFO L226 Difference]: Without dead ends: 211 [2022-11-02 20:44:55,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:44:55,642 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:55,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 186 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:44:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-02 20:44:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-11-02 20:44:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 118 states have internal predecessors, (140), 81 states have call successors, (81), 12 states have call predecessors, (81), 12 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-02 20:44:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 301 transitions. [2022-11-02 20:44:55,736 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 301 transitions. Word has length 81 [2022-11-02 20:44:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:55,736 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 301 transitions. [2022-11-02 20:44:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:44:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 301 transitions. [2022-11-02 20:44:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:44:55,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:55,742 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:55,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:55,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:55,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-11-02 20:44:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9797374] [2022-11-02 20:44:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:55,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:55,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834242742] [2022-11-02 20:44:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:55,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:55,972 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:55,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:44:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:44:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-02 20:44:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-02 20:44:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:57,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9797374] [2022-11-02 20:44:57,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:57,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834242742] [2022-11-02 20:44:57,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834242742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:57,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:44:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786411262] [2022-11-02 20:44:57,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:44:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:44:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:44:57,099 INFO L87 Difference]: Start difference. First operand 209 states and 301 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-02 20:45:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:01,353 INFO L93 Difference]: Finished difference Result 286 states and 412 transitions. [2022-11-02 20:45:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:45:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2022-11-02 20:45:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:01,356 INFO L225 Difference]: With dead ends: 286 [2022-11-02 20:45:01,357 INFO L226 Difference]: Without dead ends: 278 [2022-11-02 20:45:01,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:45:01,358 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:01,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 245 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-02 20:45:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-02 20:45:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2022-11-02 20:45:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 113 states have (on average 1.168141592920354) internal successors, (132), 115 states have internal predecessors, (132), 70 states have call successors, (70), 15 states have call predecessors, (70), 15 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-02 20:45:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 271 transitions. [2022-11-02 20:45:01,487 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 271 transitions. Word has length 87 [2022-11-02 20:45:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:01,488 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 271 transitions. [2022-11-02 20:45:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-02 20:45:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 271 transitions. [2022-11-02 20:45:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-02 20:45:01,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:01,490 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:01,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:01,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:45:01,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-11-02 20:45:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:01,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893560543] [2022-11-02 20:45:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:01,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:45:01,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908688263] [2022-11-02 20:45:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:01,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:01,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:01,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:01,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:45:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:45:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-02 20:45:01,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-11-02 20:45:02,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893560543] [2022-11-02 20:45:02,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:45:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908688263] [2022-11-02 20:45:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908688263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:02,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:45:02,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-11-02 20:45:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474907488] [2022-11-02 20:45:02,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:02,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:45:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:45:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:45:02,185 INFO L87 Difference]: Start difference. First operand 199 states and 271 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2022-11-02 20:45:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:02,731 INFO L93 Difference]: Finished difference Result 295 states and 407 transitions. [2022-11-02 20:45:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:45:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 103 [2022-11-02 20:45:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:02,733 INFO L225 Difference]: With dead ends: 295 [2022-11-02 20:45:02,734 INFO L226 Difference]: Without dead ends: 182 [2022-11-02 20:45:02,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:45:02,735 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 37 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:02,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 271 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:45:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-02 20:45:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-02 20:45:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 104 states have internal predecessors, (118), 66 states have call successors, (66), 13 states have call predecessors, (66), 13 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-02 20:45:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 249 transitions. [2022-11-02 20:45:02,840 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 249 transitions. Word has length 103 [2022-11-02 20:45:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:02,841 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 249 transitions. [2022-11-02 20:45:02,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2022-11-02 20:45:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 249 transitions. [2022-11-02 20:45:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-02 20:45:02,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:02,843 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:02,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:03,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:03,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2022-11-02 20:45:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:03,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991493770] [2022-11-02 20:45:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:03,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:45:03,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948297866] [2022-11-02 20:45:03,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:45:03,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:03,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:03,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:45:03,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:45:03,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:45:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-02 20:45:03,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:45:03,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:03,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991493770] [2022-11-02 20:45:03,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:45:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948297866] [2022-11-02 20:45:03,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948297866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:03,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:03,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:45:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930249722] [2022-11-02 20:45:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:45:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:45:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:45:03,212 INFO L87 Difference]: Start difference. First operand 182 states and 249 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-02 20:45:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:03,375 INFO L93 Difference]: Finished difference Result 249 states and 340 transitions. [2022-11-02 20:45:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:45:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2022-11-02 20:45:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:03,376 INFO L225 Difference]: With dead ends: 249 [2022-11-02 20:45:03,377 INFO L226 Difference]: Without dead ends: 172 [2022-11-02 20:45:03,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:45:03,378 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:03,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:45:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-02 20:45:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2022-11-02 20:45:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 91 states have internal predecessors, (100), 59 states have call successors, (59), 13 states have call predecessors, (59), 13 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-02 20:45:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 217 transitions. [2022-11-02 20:45:03,452 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 217 transitions. Word has length 106 [2022-11-02 20:45:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:03,452 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 217 transitions. [2022-11-02 20:45:03,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-02 20:45:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 217 transitions. [2022-11-02 20:45:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-02 20:45:03,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:03,455 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:03,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:03,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:45:03,660 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1723073834, now seen corresponding path program 2 times [2022-11-02 20:45:03,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:03,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306385235] [2022-11-02 20:45:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:03,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:45:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807033916] [2022-11-02 20:45:03,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:45:03,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:03,675 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:03,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:45:03,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:45:03,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:45:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 205 proven. 18 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-02 20:45:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-02 20:45:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:04,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306385235] [2022-11-02 20:45:04,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:45:04,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807033916] [2022-11-02 20:45:04,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807033916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:04,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:45:04,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-02 20:45:04,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320122025] [2022-11-02 20:45:04,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:04,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:45:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:45:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:45:04,185 INFO L87 Difference]: Start difference. First operand 163 states and 217 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-11-02 20:45:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:04,728 INFO L93 Difference]: Finished difference Result 225 states and 303 transitions. [2022-11-02 20:45:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:45:04,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 128 [2022-11-02 20:45:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:04,730 INFO L225 Difference]: With dead ends: 225 [2022-11-02 20:45:04,730 INFO L226 Difference]: Without dead ends: 169 [2022-11-02 20:45:04,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:45:04,732 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:04,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 210 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:45:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-02 20:45:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2022-11-02 20:45:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 85 states have internal predecessors, (92), 59 states have call successors, (59), 13 states have call predecessors, (59), 13 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-02 20:45:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-11-02 20:45:04,801 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 128 [2022-11-02 20:45:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:04,802 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-11-02 20:45:04,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-11-02 20:45:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-11-02 20:45:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-02 20:45:04,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:04,804 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:04,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:45:05,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:05,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2022-11-02 20:45:05,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:05,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832016407] [2022-11-02 20:45:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:05,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:05,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:45:05,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251651619] [2022-11-02 20:45:05,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:45:05,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:05,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:05,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:45:05,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:45:05,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-02 20:45:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 176 proven. 103 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-02 20:45:09,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:55,043 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_30| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_46| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| Int)) (let ((.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|)) (.cse3 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|)) (.cse4 (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116|))) (let ((.cse0 (+ .cse2 .cse3 .cse4)) (.cse1 (* |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_30| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|))) (or (= (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_46| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_46| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_61|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_67|))) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| 0) (not (= .cse0 (+ (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| .cse1))) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127|) .cse2 (* (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_30| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|) .cse3 .cse4) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|) 0) (= .cse0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| .cse1)))))))) is different from true [2022-11-02 20:46:48,548 WARN L234 SmtUtils]: Spent 14.06s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:47:06,735 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_30| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_46| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| Int)) (let ((.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|)) (.cse3 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|)) (.cse4 (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116|))) (let ((.cse0 (+ .cse2 .cse3 .cse4)) (.cse1 (* |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_30| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|))) (or (= (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_46| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_46| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_121| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_61|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_67|))) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| 0) (not (= .cse0 (+ (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| .cse1))) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127|) .cse2 (* (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_30| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_86|) .cse3 .cse4) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_84|) 0) (= .cse0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_127| .cse1))))))) is different from true [2022-11-02 20:47:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 206 proven. 4 refuted. 0 times theorem prover too weak. 398 trivial. 7 not checked. [2022-11-02 20:47:12,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832016407] [2022-11-02 20:47:12,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:47:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251651619] [2022-11-02 20:47:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251651619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:47:12,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:47:12,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 36 [2022-11-02 20:47:12,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504384315] [2022-11-02 20:47:12,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:47:12,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:47:12,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:47:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=917, Unknown=6, NotChecked=130, Total=1260 [2022-11-02 20:47:12,164 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 23 states have internal predecessors, (51), 17 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-02 20:47:44,689 WARN L234 SmtUtils]: Spent 26.06s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:47:59,946 WARN L234 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:48:28,105 WARN L234 SmtUtils]: Spent 26.06s on a formula simplification. DAG size of input: 53 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:48:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:39,348 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2022-11-02 20:48:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:48:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 23 states have internal predecessors, (51), 17 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) Word has length 134 [2022-11-02 20:48:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:39,350 INFO L225 Difference]: With dead ends: 265 [2022-11-02 20:48:39,351 INFO L226 Difference]: Without dead ends: 136 [2022-11-02 20:48:39,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 111.8s TimeCoverageRelationStatistics Valid=368, Invalid=1699, Unknown=11, NotChecked=178, Total=2256 [2022-11-02 20:48:39,353 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:39,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 234 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 815 Invalid, 0 Unknown, 198 Unchecked, 6.9s Time] [2022-11-02 20:48:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-02 20:48:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-11-02 20:48:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 46 states have call successors, (46), 14 states have call predecessors, (46), 14 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-02 20:48:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2022-11-02 20:48:39,452 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 134 [2022-11-02 20:48:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:39,456 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2022-11-02 20:48:39,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 23 states have internal predecessors, (51), 17 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-02 20:48:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2022-11-02 20:48:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-02 20:48:39,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:39,459 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:39,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:39,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:39,682 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash 821448208, now seen corresponding path program 3 times [2022-11-02 20:48:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:39,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345875450] [2022-11-02 20:48:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:39,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:39,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:48:39,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337055944] [2022-11-02 20:48:39,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:48:39,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:39,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:39,698 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:39,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fa33ee1-f74d-44e3-b996-35234dca6da2/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:48:39,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:48:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:48:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:48:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 150 proven. 45 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2022-11-02 20:48:41,590 INFO L328 TraceCheckSpWp]: Computing backward predicates...