./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa --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 47fbdb3da16165eeeef0687b73275c90a2682f5a520ac2387154637187559fe6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:41:04,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:41:04,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:41:04,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:41:04,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:41:04,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:41:04,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:41:04,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:41:04,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:41:04,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:41:04,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:41:04,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:41:04,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:41:04,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:41:04,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:41:04,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:41:04,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:41:04,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:41:04,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:41:04,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:41:04,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:41:04,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:41:04,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:41:04,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:41:04,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:41:04,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:41:04,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:41:04,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:41:04,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:41:04,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:41:04,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:41:04,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:41:04,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:41:04,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:41:04,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:41:04,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:41:04,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:41:04,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:41:04,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:41:04,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:41:04,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:41:04,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:41:04,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:41:04,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:41:04,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:41:04,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:41:04,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:41:04,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:41:04,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:41:04,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:41:04,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:41:04,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:41:04,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:41:04,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:41:04,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:41:04,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:41:04,532 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_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47fbdb3da16165eeeef0687b73275c90a2682f5a520ac2387154637187559fe6 [2021-12-06 19:41:04,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:41:04,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:41:04,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:41:04,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:41:04,723 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:41:04,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-12-06 19:41:04,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/data/a66630eab/3f0315879dc44aa6b50f6cca90a76a96/FLAGcf335b556 [2021-12-06 19:41:05,133 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:41:05,134 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-12-06 19:41:05,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/data/a66630eab/3f0315879dc44aa6b50f6cca90a76a96/FLAGcf335b556 [2021-12-06 19:41:05,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/data/a66630eab/3f0315879dc44aa6b50f6cca90a76a96 [2021-12-06 19:41:05,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:41:05,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:41:05,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:41:05,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:41:05,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:41:05,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33427752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05, skipping insertion in model container [2021-12-06 19:41:05,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:41:05,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:41:05,281 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_3d195a08-122f-4d59-84ff-20d34e067bf3/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2021-12-06 19:41:05,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:41:05,296 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:41:05,305 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_3d195a08-122f-4d59-84ff-20d34e067bf3/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2021-12-06 19:41:05,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:41:05,318 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:41:05,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05 WrapperNode [2021-12-06 19:41:05,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:41:05,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:41:05,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:41:05,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:41:05,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,349 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2021-12-06 19:41:05,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:41:05,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:41:05,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:41:05,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:41:05,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:41:05,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:41:05,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:41:05,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:41:05,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (1/1) ... [2021-12-06 19:41:05,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:41:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:05,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:41:05,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:41:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:41:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:41:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:41:05,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:41:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:41:05,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:41:05,481 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:41:05,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:41:05,547 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:41:05,553 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:41:05,553 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:41:05,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:41:05 BoogieIcfgContainer [2021-12-06 19:41:05,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:41:05,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:41:05,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:41:05,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:41:05,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:41:05" (1/3) ... [2021-12-06 19:41:05,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f5c4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:41:05, skipping insertion in model container [2021-12-06 19:41:05,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:41:05" (2/3) ... [2021-12-06 19:41:05,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f5c4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:41:05, skipping insertion in model container [2021-12-06 19:41:05,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:41:05" (3/3) ... [2021-12-06 19:41:05,563 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound100.c [2021-12-06 19:41:05,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:41:05,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:41:05,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:41:05,614 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:41:05,614 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:41:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:41:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:41:05,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:05,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:05,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2021-12-06 19:41:05,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:05,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975689661] [2021-12-06 19:41:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:05,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:05,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975689661] [2021-12-06 19:41:05,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975689661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:41:05,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:41:05,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:41:05,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47891529] [2021-12-06 19:41:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:41:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:41:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:41:05,764 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:41:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:05,778 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-12-06 19:41:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:41:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:41:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:05,786 INFO L225 Difference]: With dead ends: 34 [2021-12-06 19:41:05,786 INFO L226 Difference]: Without dead ends: 14 [2021-12-06 19:41:05,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:41:05,791 INFO L933 BasicCegarLoop]: 21 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, 21 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 [2021-12-06 19:41:05,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:05,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-06 19:41:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-06 19:41:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:41:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-12-06 19:41:05,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2021-12-06 19:41:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:05,820 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-12-06 19:41:05,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:41:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-12-06 19:41:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:41:05,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:05,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:05,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:41:05,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2021-12-06 19:41:05,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941109890] [2021-12-06 19:41:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:05,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:05,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:05,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82741878] [2021-12-06 19:41:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:05,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:05,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:05,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:05,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:41:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:41:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:05,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:41:05,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941109890] [2021-12-06 19:41:05,945 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:05,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82741878] [2021-12-06 19:41:05,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82741878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:41:05,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:41:05,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:41:05,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498292966] [2021-12-06 19:41:05,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:05,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:41:05,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:41:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:41:05,950 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:41:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:05,967 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-12-06 19:41:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:41:05,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:41:05,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:05,968 INFO L225 Difference]: With dead ends: 24 [2021-12-06 19:41:05,969 INFO L226 Difference]: Without dead ends: 16 [2021-12-06 19:41:05,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:41:05,971 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:05,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-06 19:41:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-06 19:41:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:41:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-06 19:41:05,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2021-12-06 19:41:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:05,978 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-06 19:41:05,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:41:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-06 19:41:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:41:05,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:05,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:06,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:41:06,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:06,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2021-12-06 19:41:06,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:06,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754423153] [2021-12-06 19:41:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:06,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:06,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:06,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216564432] [2021-12-06 19:41:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:06,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:06,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:06,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:41:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:41:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:06,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:41:06,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:06,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754423153] [2021-12-06 19:41:06,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216564432] [2021-12-06 19:41:06,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216564432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:41:06,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:41:06,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:41:06,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786996598] [2021-12-06 19:41:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:06,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:41:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:41:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:41:06,287 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:41:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:06,325 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-12-06 19:41:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:41:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:41:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:06,327 INFO L225 Difference]: With dead ends: 26 [2021-12-06 19:41:06,327 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 19:41:06,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:41:06,329 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:06,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 19:41:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 19:41:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:41:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-06 19:41:06,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2021-12-06 19:41:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:06,338 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-06 19:41:06,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:41:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-06 19:41:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 19:41:06,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:06,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:06,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:41:06,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:06,541 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2021-12-06 19:41:06,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:06,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580697168] [2021-12-06 19:41:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:06,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:06,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:06,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244069220] [2021-12-06 19:41:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:06,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:06,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:06,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:41:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:41:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:06,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:06,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:06,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580697168] [2021-12-06 19:41:06,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:06,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244069220] [2021-12-06 19:41:06,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244069220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:06,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:41:06,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 19:41:06,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239098567] [2021-12-06 19:41:06,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:06,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:41:06,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:06,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:41:06,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:41:06,724 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:41:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:06,785 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-06 19:41:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:41:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-06 19:41:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:06,787 INFO L225 Difference]: With dead ends: 56 [2021-12-06 19:41:06,787 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 19:41:06,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:41:06,788 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:06,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 93 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 19:41:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-06 19:41:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:41:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-12-06 19:41:06,795 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2021-12-06 19:41:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:06,795 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-12-06 19:41:06,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:41:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-12-06 19:41:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 19:41:06,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:06,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:06,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:41:06,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 19:41:06,997 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2021-12-06 19:41:06,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736456560] [2021-12-06 19:41:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:06,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:07,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:07,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905345689] [2021-12-06 19:41:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:07,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:07,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:07,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:41:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:41:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:07,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:41:07,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736456560] [2021-12-06 19:41:07,313 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905345689] [2021-12-06 19:41:07,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905345689] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:07,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:07,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 19:41:07,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475086248] [2021-12-06 19:41:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:41:07,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:41:07,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:41:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:41:07,315 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:41:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:07,340 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-12-06 19:41:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:41:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 19:41:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:07,342 INFO L225 Difference]: With dead ends: 58 [2021-12-06 19:41:07,342 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 19:41:07,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:41:07,343 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:07,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 19:41:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-06 19:41:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:41:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-06 19:41:07,353 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2021-12-06 19:41:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:07,353 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-06 19:41:07,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:41:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-06 19:41:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 19:41:07,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:07,354 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:07,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 19:41:07,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:07,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2021-12-06 19:41:07,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365906991] [2021-12-06 19:41:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:07,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:07,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576860804] [2021-12-06 19:41:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:07,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:07,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:07,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:07,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:41:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:41:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:41:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:07,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365906991] [2021-12-06 19:41:07,843 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576860804] [2021-12-06 19:41:07,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576860804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:07,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:07,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-06 19:41:07,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396478963] [2021-12-06 19:41:07,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:07,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:41:07,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:41:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:41:07,844 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:41:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:07,889 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-06 19:41:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:41:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-06 19:41:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:07,890 INFO L225 Difference]: With dead ends: 46 [2021-12-06 19:41:07,890 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 19:41:07,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:41:07,891 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:07,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 19:41:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-06 19:41:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:41:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-12-06 19:41:07,896 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2021-12-06 19:41:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:07,897 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-12-06 19:41:07,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:41:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-12-06 19:41:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 19:41:07,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:07,898 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:07,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:41:08,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:08,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2021-12-06 19:41:08,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017083310] [2021-12-06 19:41:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:08,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:08,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:08,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816913538] [2021-12-06 19:41:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:41:08,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:08,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:08,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:41:08,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:41:08,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:08,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 19:41:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:41:08,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:08,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017083310] [2021-12-06 19:41:08,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816913538] [2021-12-06 19:41:08,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816913538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:08,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:08,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-06 19:41:08,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904027964] [2021-12-06 19:41:08,478 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:08,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:41:08,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:41:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:41:08,479 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:41:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:08,531 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-12-06 19:41:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:41:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-12-06 19:41:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:08,532 INFO L225 Difference]: With dead ends: 46 [2021-12-06 19:41:08,532 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 19:41:08,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:41:08,533 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:08,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 124 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 19:41:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-06 19:41:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:41:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-06 19:41:08,539 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2021-12-06 19:41:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:08,539 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-06 19:41:08,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:41:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-06 19:41:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:41:08,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:08,540 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:08,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:41:08,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:08,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2021-12-06 19:41:08,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127736555] [2021-12-06 19:41:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:08,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:08,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395690256] [2021-12-06 19:41:08,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:41:08,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:08,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:08,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:41:08,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:41:08,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:41:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:41:09,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:09,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127736555] [2021-12-06 19:41:09,163 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395690256] [2021-12-06 19:41:09,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395690256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:09,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:09,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-06 19:41:09,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415372120] [2021-12-06 19:41:09,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:09,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:41:09,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:41:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:41:09,165 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:41:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:09,226 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-12-06 19:41:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:41:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-12-06 19:41:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:09,227 INFO L225 Difference]: With dead ends: 48 [2021-12-06 19:41:09,227 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 19:41:09,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:41:09,228 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:09,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 19:41:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 19:41:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:41:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-06 19:41:09,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-12-06 19:41:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:09,233 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-06 19:41:09,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:41:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-06 19:41:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 19:41:09,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:09,239 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:09,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:41:09,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 19:41:09,441 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:09,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2021-12-06 19:41:09,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:09,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604110365] [2021-12-06 19:41:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:09,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:09,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:09,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309615917] [2021-12-06 19:41:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:41:09,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:09,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:09,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:41:09,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:41:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:41:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:09,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:41:09,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604110365] [2021-12-06 19:41:09,660 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309615917] [2021-12-06 19:41:09,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309615917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:09,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:41:09,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-06 19:41:09,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941611219] [2021-12-06 19:41:09,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:09,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:41:09,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:41:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:41:09,662 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:41:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:09,774 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-12-06 19:41:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:41:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2021-12-06 19:41:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:09,775 INFO L225 Difference]: With dead ends: 119 [2021-12-06 19:41:09,775 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 19:41:09,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:41:09,776 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 150 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:09,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 113 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 19:41:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-12-06 19:41:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-12-06 19:41:09,785 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2021-12-06 19:41:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:09,785 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-12-06 19:41:09,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:41:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-12-06 19:41:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:41:09,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:09,787 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:09,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:41:09,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:09,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2021-12-06 19:41:09,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473510642] [2021-12-06 19:41:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:09,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:10,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:10,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573473694] [2021-12-06 19:41:10,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:41:10,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:10,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:10,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:10,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:41:10,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:41:10,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:41:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:41:10,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:10,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473510642] [2021-12-06 19:41:10,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573473694] [2021-12-06 19:41:10,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573473694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:10,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:10,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-06 19:41:10,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912618643] [2021-12-06 19:41:10,409 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:10,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:41:10,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:41:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:41:10,410 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:41:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:10,489 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-12-06 19:41:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:41:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-12-06 19:41:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:10,491 INFO L225 Difference]: With dead ends: 94 [2021-12-06 19:41:10,491 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 19:41:10,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:41:10,492 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:10,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 214 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 19:41:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 19:41:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-12-06 19:41:10,504 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2021-12-06 19:41:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:10,504 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-12-06 19:41:10,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:41:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-12-06 19:41:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 19:41:10,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:10,506 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:10,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:41:10,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:41:10,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2021-12-06 19:41:10,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972323936] [2021-12-06 19:41:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:10,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:10,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979160825] [2021-12-06 19:41:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:41:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:10,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:10,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:41:10,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 19:41:10,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:10,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 19:41:10,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 19:41:11,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:11,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972323936] [2021-12-06 19:41:11,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979160825] [2021-12-06 19:41:11,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979160825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:11,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:11,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 19:41:11,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146175296] [2021-12-06 19:41:11,135 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:11,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:41:11,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:41:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:41:11,136 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:41:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:11,239 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-12-06 19:41:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:41:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2021-12-06 19:41:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:11,240 INFO L225 Difference]: With dead ends: 94 [2021-12-06 19:41:11,240 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 19:41:11,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:41:11,242 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:11,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 268 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 19:41:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 19:41:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-06 19:41:11,249 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2021-12-06 19:41:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:11,250 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-06 19:41:11,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:41:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-06 19:41:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:41:11,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:11,251 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:11,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:41:11,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:41:11,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2021-12-06 19:41:11,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:11,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683108292] [2021-12-06 19:41:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:11,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:11,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:11,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242493739] [2021-12-06 19:41:11,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:41:11,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:11,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:11,459 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:11,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:41:11,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 19:41:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:41:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:41:11,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:12,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683108292] [2021-12-06 19:41:12,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242493739] [2021-12-06 19:41:12,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242493739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:12,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:12,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-06 19:41:12,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585803236] [2021-12-06 19:41:12,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:12,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:41:12,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:12,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:41:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:41:12,475 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:41:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:12,584 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-12-06 19:41:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:41:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2021-12-06 19:41:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:12,585 INFO L225 Difference]: With dead ends: 94 [2021-12-06 19:41:12,585 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 19:41:12,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:41:12,586 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:12,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 328 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 19:41:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 19:41:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-12-06 19:41:12,599 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2021-12-06 19:41:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:12,600 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-12-06 19:41:12,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:41:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-12-06 19:41:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 19:41:12,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:12,601 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:12,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:41:12,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:41:12,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2021-12-06 19:41:12,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:12,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663217231] [2021-12-06 19:41:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:12,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:12,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:12,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636535227] [2021-12-06 19:41:12,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:41:12,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:12,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:12,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:41:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:41:13,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 19:41:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:13,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663217231] [2021-12-06 19:41:13,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636535227] [2021-12-06 19:41:13,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636535227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:13,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:13,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-06 19:41:13,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460740958] [2021-12-06 19:41:13,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:13,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:41:13,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:41:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:41:13,609 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:41:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:13,735 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-12-06 19:41:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:41:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2021-12-06 19:41:13,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:13,736 INFO L225 Difference]: With dead ends: 94 [2021-12-06 19:41:13,737 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 19:41:13,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:41:13,738 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:13,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 394 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 19:41:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 19:41:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-12-06 19:41:13,745 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2021-12-06 19:41:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:13,745 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-12-06 19:41:13,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:41:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-12-06 19:41:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 19:41:13,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:13,747 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:13,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:41:13,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:41:13,948 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2021-12-06 19:41:13,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:13,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386967761] [2021-12-06 19:41:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:13,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:13,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:13,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060743650] [2021-12-06 19:41:13,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:41:13,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:13,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:13,981 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:41:14,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:41:14,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:14,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 19:41:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 19:41:14,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:15,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386967761] [2021-12-06 19:41:15,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060743650] [2021-12-06 19:41:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060743650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:15,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:15,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-06 19:41:15,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173623026] [2021-12-06 19:41:15,035 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:15,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:41:15,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:15,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:41:15,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:41:15,036 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:41:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:15,185 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-12-06 19:41:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:41:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2021-12-06 19:41:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:15,186 INFO L225 Difference]: With dead ends: 94 [2021-12-06 19:41:15,186 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 19:41:15,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:41:15,187 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:15,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 466 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 19:41:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 19:41:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-06 19:41:15,192 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2021-12-06 19:41:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:15,193 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-06 19:41:15,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:41:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-06 19:41:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 19:41:15,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:15,194 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:15,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:41:15,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:15,395 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2021-12-06 19:41:15,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:15,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94805083] [2021-12-06 19:41:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:15,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:15,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:15,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837200362] [2021-12-06 19:41:15,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:41:15,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:15,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:15,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:15,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:41:15,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 19:41:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 19:41:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 19:41:15,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:16,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94805083] [2021-12-06 19:41:16,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837200362] [2021-12-06 19:41:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837200362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:16,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:16,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-06 19:41:16,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262748602] [2021-12-06 19:41:16,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:16,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:41:16,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:16,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:41:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:41:16,081 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:16,244 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-06 19:41:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:41:16,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2021-12-06 19:41:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:16,245 INFO L225 Difference]: With dead ends: 96 [2021-12-06 19:41:16,245 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 19:41:16,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:41:16,246 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:16,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 544 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 19:41:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-06 19:41:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:41:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-12-06 19:41:16,251 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2021-12-06 19:41:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:16,251 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-12-06 19:41:16,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:41:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-12-06 19:41:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 19:41:16,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:16,252 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:16,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:41:16,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:41:16,453 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2021-12-06 19:41:16,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:16,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88611552] [2021-12-06 19:41:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:16,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:16,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:16,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119057767] [2021-12-06 19:41:16,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:41:16,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:16,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:16,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:41:16,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 19:41:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:41:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:41:16,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-06 19:41:17,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:17,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88611552] [2021-12-06 19:41:17,055 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:17,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119057767] [2021-12-06 19:41:17,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119057767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:41:17,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:41:17,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 19:41:17,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719670823] [2021-12-06 19:41:17,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:17,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:41:17,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:41:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:41:17,057 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 19:41:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:17,345 INFO L93 Difference]: Finished difference Result 245 states and 257 transitions. [2021-12-06 19:41:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 19:41:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2021-12-06 19:41:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:17,347 INFO L225 Difference]: With dead ends: 245 [2021-12-06 19:41:17,347 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 19:41:17,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:41:17,348 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 328 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:17,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 237 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:41:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 19:41:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 185. [2021-12-06 19:41:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 139 states have internal predecessors, (152), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2021-12-06 19:41:17,357 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2021-12-06 19:41:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:17,357 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2021-12-06 19:41:17,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 19:41:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2021-12-06 19:41:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 19:41:17,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:17,358 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:17,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:41:17,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:41:17,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:17,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2021-12-06 19:41:17,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:17,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315554601] [2021-12-06 19:41:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:17,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:17,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:17,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426343594] [2021-12-06 19:41:17,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:41:17,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:17,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:41:18,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:41:18,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:18,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 19:41:18,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-06 19:41:19,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:19,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315554601] [2021-12-06 19:41:19,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426343594] [2021-12-06 19:41:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426343594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:19,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:19,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-06 19:41:19,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161348564] [2021-12-06 19:41:19,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:19,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:41:19,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:41:19,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:41:19,287 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:41:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:19,477 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2021-12-06 19:41:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:41:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2021-12-06 19:41:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:19,478 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:19,478 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:19,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:41:19,479 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:19,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 628 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:41:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 196 transitions. [2021-12-06 19:41:19,488 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 196 transitions. Word has length 94 [2021-12-06 19:41:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:19,488 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 196 transitions. [2021-12-06 19:41:19,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:41:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 196 transitions. [2021-12-06 19:41:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 19:41:19,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:19,489 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:19,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:41:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:41:19,690 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2021-12-06 19:41:19,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650455356] [2021-12-06 19:41:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:19,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:19,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:19,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228492890] [2021-12-06 19:41:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:41:19,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:19,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:19,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:41:20,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 19:41:20,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 19:41:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-06 19:41:20,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:20,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650455356] [2021-12-06 19:41:20,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228492890] [2021-12-06 19:41:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228492890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:20,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:20,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-06 19:41:20,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019907177] [2021-12-06 19:41:20,588 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:20,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:41:20,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:41:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:41:20,589 INFO L87 Difference]: Start difference. First operand 185 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:41:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:20,786 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2021-12-06 19:41:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:41:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2021-12-06 19:41:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:20,788 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:20,788 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:20,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:41:20,789 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:20,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 718 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:41:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2021-12-06 19:41:20,797 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 102 [2021-12-06 19:41:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:20,797 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2021-12-06 19:41:20,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:41:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2021-12-06 19:41:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 19:41:20,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:20,798 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:20,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:41:20,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:41:21,000 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2021-12-06 19:41:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345788929] [2021-12-06 19:41:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:21,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:21,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:21,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844543128] [2021-12-06 19:41:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:41:21,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:21,026 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:21,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:41:21,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 19:41:21,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 19:41:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-06 19:41:21,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:21,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:21,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345788929] [2021-12-06 19:41:21,814 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:21,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844543128] [2021-12-06 19:41:21,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844543128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:21,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:21,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-06 19:41:21,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911901598] [2021-12-06 19:41:21,815 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:21,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:41:21,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:41:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:41:21,816 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 19:41:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:22,080 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2021-12-06 19:41:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:41:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2021-12-06 19:41:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:22,082 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:22,082 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:22,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:41:22,083 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:22,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 814 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:41:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 194 transitions. [2021-12-06 19:41:22,095 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 194 transitions. Word has length 110 [2021-12-06 19:41:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:22,096 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 194 transitions. [2021-12-06 19:41:22,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 19:41:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 194 transitions. [2021-12-06 19:41:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 19:41:22,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:22,098 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:22,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:41:22,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:22,299 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2021-12-06 19:41:22,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:22,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917263716] [2021-12-06 19:41:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:22,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:22,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:22,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807956181] [2021-12-06 19:41:22,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:41:22,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:22,333 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:22,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:41:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:41:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 19:41:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 364 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-06 19:41:23,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:23,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917263716] [2021-12-06 19:41:23,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807956181] [2021-12-06 19:41:23,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807956181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:23,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:23,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-06 19:41:23,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325150023] [2021-12-06 19:41:23,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:23,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:41:23,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:41:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:41:23,417 INFO L87 Difference]: Start difference. First operand 185 states and 194 transitions. Second operand has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:41:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:23,698 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2021-12-06 19:41:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:41:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2021-12-06 19:41:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:23,700 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:23,700 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:23,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:41:23,701 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 2 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:23,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 916 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:41:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2021-12-06 19:41:23,709 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 118 [2021-12-06 19:41:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:23,709 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2021-12-06 19:41:23,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:41:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2021-12-06 19:41:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 19:41:23,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:23,710 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:23,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 19:41:23,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:23,911 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2021-12-06 19:41:23,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:23,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577325099] [2021-12-06 19:41:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:23,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:23,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169367472] [2021-12-06 19:41:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:41:23,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:23,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:23,939 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:23,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:41:24,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:41:24,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 19:41:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-12-06 19:41:25,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:25,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577325099] [2021-12-06 19:41:25,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169367472] [2021-12-06 19:41:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169367472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:25,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:25,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-06 19:41:25,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423403885] [2021-12-06 19:41:25,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:25,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:41:25,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:41:25,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=988, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 19:41:25,965 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:41:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:26,258 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2021-12-06 19:41:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:41:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2021-12-06 19:41:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:26,259 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:26,259 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:26,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 19:41:26,260 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:26,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1024 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:41:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 192 transitions. [2021-12-06 19:41:26,268 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 192 transitions. Word has length 126 [2021-12-06 19:41:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:26,269 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 192 transitions. [2021-12-06 19:41:26,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:41:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 192 transitions. [2021-12-06 19:41:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 19:41:26,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:26,270 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:26,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 19:41:26,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:26,471 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2021-12-06 19:41:26,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:26,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009087301] [2021-12-06 19:41:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:26,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:26,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694023133] [2021-12-06 19:41:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:41:26,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:26,499 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:26,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:41:27,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-06 19:41:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 19:41:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 32 proven. 480 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 19:41:27,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:27,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009087301] [2021-12-06 19:41:27,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694023133] [2021-12-06 19:41:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694023133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:27,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-06 19:41:27,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147503585] [2021-12-06 19:41:27,859 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:27,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:41:27,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:41:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:41:27,860 INFO L87 Difference]: Start difference. First operand 185 states and 192 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 19:41:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:28,172 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2021-12-06 19:41:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 19:41:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 134 [2021-12-06 19:41:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:28,173 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:28,174 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:28,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:41:28,174 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:28,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1138 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:41:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 states have internal predecessors, (146), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 191 transitions. [2021-12-06 19:41:28,182 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 191 transitions. Word has length 134 [2021-12-06 19:41:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:28,183 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 191 transitions. [2021-12-06 19:41:28,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 19:41:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 191 transitions. [2021-12-06 19:41:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 19:41:28,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:28,184 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:28,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 19:41:28,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:28,385 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1347219516, now seen corresponding path program 16 times [2021-12-06 19:41:28,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573987626] [2021-12-06 19:41:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:28,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:28,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:28,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203433359] [2021-12-06 19:41:28,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:41:28,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:28,413 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 19:41:29,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:41:29,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 19:41:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-06 19:41:29,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:29,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:41:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573987626] [2021-12-06 19:41:29,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:41:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203433359] [2021-12-06 19:41:29,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203433359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:29,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:41:29,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-06 19:41:29,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010991649] [2021-12-06 19:41:29,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:29,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:41:29,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:41:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:41:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:41:29,741 INFO L87 Difference]: Start difference. First operand 185 states and 191 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 19:41:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:30,086 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2021-12-06 19:41:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:41:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 142 [2021-12-06 19:41:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:30,088 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:41:30,088 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:41:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:41:30,088 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:41:30,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1258 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:41:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:41:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:41:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0431654676258992) internal successors, (145), 139 states have internal predecessors, (145), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:41:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2021-12-06 19:41:30,096 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 142 [2021-12-06 19:41:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:41:30,097 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2021-12-06 19:41:30,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 19:41:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2021-12-06 19:41:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 19:41:30,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:41:30,098 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2021-12-06 19:41:30,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 19:41:30,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:30,299 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:41:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:41:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash 764197026, now seen corresponding path program 17 times [2021-12-06 19:41:30,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:41:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032925269] [2021-12-06 19:41:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:41:30,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:41:30,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:41:30,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875842495] [2021-12-06 19:41:30,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:41:30,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:41:30,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:41:30,328 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:41:30,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 19:41:31,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 19:41:31,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:41:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 19:41:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:41:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 86 proven. 613 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 19:41:31,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:38,335 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| Int)) (or (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|) (* (- 2) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|) (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|)) (- 4)) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|))))) is different from true [2021-12-06 19:43:05,243 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| Int)) (or (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|) (* (- 2) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|) (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|)) (- 4)) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_232|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2021-12-06 19:43:13,289 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* 2 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 1)) (<= |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~c~0#1|) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2021-12-06 19:43:15,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032925269] [2021-12-06 19:43:15,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875842495] [2021-12-06 19:43:15,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875842495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:15,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:15,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-06 19:43:15,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117373124] [2021-12-06 19:43:15,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:15,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:43:15,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:43:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=684, Unknown=13, NotChecked=162, Total=930 [2021-12-06 19:43:15,309 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 19:43:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:15,820 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2021-12-06 19:43:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:43:15,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 150 [2021-12-06 19:43:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:15,822 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:43:15,822 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:43:15,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=89, Invalid=840, Unknown=13, NotChecked=180, Total=1122 [2021-12-06 19:43:15,823 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:15,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1345 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:43:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:43:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:43:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:43:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2021-12-06 19:43:15,831 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 150 [2021-12-06 19:43:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:15,831 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2021-12-06 19:43:15,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 19:43:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2021-12-06 19:43:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 19:43:15,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:15,832 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:15,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 19:43:16,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 19:43:16,032 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash -439829752, now seen corresponding path program 18 times [2021-12-06 19:43:16,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117676009] [2021-12-06 19:43:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:16,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:16,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:16,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237354094] [2021-12-06 19:43:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:43:16,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:16,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:16,040 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:16,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 19:43:16,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 19:43:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 19:43:16,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 38 proven. 684 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-12-06 19:43:17,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:17,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:17,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117676009] [2021-12-06 19:43:17,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:17,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237354094] [2021-12-06 19:43:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237354094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:17,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:17,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-06 19:43:17,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630484832] [2021-12-06 19:43:17,205 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:17,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:43:17,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:43:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:43:17,206 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 19:43:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:17,655 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2021-12-06 19:43:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 19:43:17,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 158 [2021-12-06 19:43:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:17,656 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:43:17,656 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:43:17,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:43:17,657 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 2 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:17,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:43:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:43:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:43:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:43:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2021-12-06 19:43:17,666 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 158 [2021-12-06 19:43:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:17,666 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2021-12-06 19:43:17,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 19:43:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2021-12-06 19:43:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 19:43:17,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:17,671 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:17,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 19:43:17,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 19:43:17,871 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1042741102, now seen corresponding path program 19 times [2021-12-06 19:43:17,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913574198] [2021-12-06 19:43:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:17,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:17,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:17,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541209695] [2021-12-06 19:43:17,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:43:17,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:17,879 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:17,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 19:43:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 19:43:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 40 proven. 760 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-06 19:43:19,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:19,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:19,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913574198] [2021-12-06 19:43:19,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:19,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541209695] [2021-12-06 19:43:19,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541209695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:19,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:19,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-06 19:43:19,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746469118] [2021-12-06 19:43:19,173 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:19,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:43:19,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:43:19,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:43:19,175 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 19:43:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:19,622 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-12-06 19:43:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:43:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 166 [2021-12-06 19:43:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:19,624 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:43:19,624 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:43:19,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:43:19,624 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:19,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1654 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:43:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:43:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:43:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:43:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2021-12-06 19:43:19,632 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 166 [2021-12-06 19:43:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:19,633 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2021-12-06 19:43:19,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 19:43:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2021-12-06 19:43:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 19:43:19,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:19,634 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:19,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 19:43:19,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 19:43:19,835 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1976397268, now seen corresponding path program 20 times [2021-12-06 19:43:19,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427192613] [2021-12-06 19:43:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:19,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:19,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872271750] [2021-12-06 19:43:19,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:43:19,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:19,863 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:19,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 19:43:20,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:43:20,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 19:43:20,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 42 proven. 840 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-06 19:43:21,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:21,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427192613] [2021-12-06 19:43:21,249 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872271750] [2021-12-06 19:43:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872271750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:21,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:21,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-06 19:43:21,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541146676] [2021-12-06 19:43:21,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:21,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:43:21,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:43:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:43:21,250 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 19:43:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:21,792 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2021-12-06 19:43:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:43:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 174 [2021-12-06 19:43:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:21,794 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:43:21,794 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:43:21,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-12-06 19:43:21,794 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:21,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1798 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:43:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:43:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-06 19:43:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:43:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-12-06 19:43:21,802 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2021-12-06 19:43:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-12-06 19:43:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 19:43:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-12-06 19:43:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 19:43:21,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:21,803 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:21,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 19:43:22,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 19:43:22,004 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1172446778, now seen corresponding path program 21 times [2021-12-06 19:43:22,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:22,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842723817] [2021-12-06 19:43:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:22,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:22,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:22,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426165810] [2021-12-06 19:43:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:43:22,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:22,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:22,011 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:22,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 19:43:22,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 19:43:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 19:43:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 44 proven. 924 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-06 19:43:23,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:23,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842723817] [2021-12-06 19:43:23,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426165810] [2021-12-06 19:43:23,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426165810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:23,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:23,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-12-06 19:43:23,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050660525] [2021-12-06 19:43:23,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:23,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:43:23,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:43:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:43:23,476 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:43:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:24,035 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2021-12-06 19:43:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 19:43:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 182 [2021-12-06 19:43:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:24,036 INFO L225 Difference]: With dead ends: 192 [2021-12-06 19:43:24,037 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 19:43:24,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:43:24,037 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:24,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1948 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:43:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 19:43:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-12-06 19:43:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 24 states have call successors, (24), 23 states have call predecessors, (24), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 19:43:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2021-12-06 19:43:24,045 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2021-12-06 19:43:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:24,046 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2021-12-06 19:43:24,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:43:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2021-12-06 19:43:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-06 19:43:24,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:24,047 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:24,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 19:43:24,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:24,247 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2069758241, now seen corresponding path program 4 times [2021-12-06 19:43:24,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:24,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085044340] [2021-12-06 19:43:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:24,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:24,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63449328] [2021-12-06 19:43:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:43:24,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:24,255 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:24,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 19:43:25,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:43:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 19:43:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:43:25,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-06 19:43:26,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085044340] [2021-12-06 19:43:26,221 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63449328] [2021-12-06 19:43:26,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63449328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:26,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:43:26,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-06 19:43:26,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126335430] [2021-12-06 19:43:26,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:26,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 19:43:26,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 19:43:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:43:26,223 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-06 19:43:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:27,089 INFO L93 Difference]: Finished difference Result 497 states and 521 transitions. [2021-12-06 19:43:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-06 19:43:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 184 [2021-12-06 19:43:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:27,091 INFO L225 Difference]: With dead ends: 497 [2021-12-06 19:43:27,091 INFO L226 Difference]: Without dead ends: 492 [2021-12-06 19:43:27,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 19:43:27,097 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 673 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:27,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 398 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:43:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-06 19:43:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 377. [2021-12-06 19:43:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.088339222614841) internal successors, (308), 283 states have internal predecessors, (308), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:43:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 401 transitions. [2021-12-06 19:43:27,111 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 401 transitions. Word has length 184 [2021-12-06 19:43:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:27,111 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 401 transitions. [2021-12-06 19:43:27,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-06 19:43:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 401 transitions. [2021-12-06 19:43:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 19:43:27,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:27,113 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:27,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 19:43:27,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 19:43:27,313 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash -510981984, now seen corresponding path program 22 times [2021-12-06 19:43:27,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956950678] [2021-12-06 19:43:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:27,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:27,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223424752] [2021-12-06 19:43:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:43:27,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:27,321 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:27,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 19:43:28,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:43:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 19:43:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 46 proven. 1012 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-12-06 19:43:29,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:29,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956950678] [2021-12-06 19:43:29,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223424752] [2021-12-06 19:43:29,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223424752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:29,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:29,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-06 19:43:29,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353687570] [2021-12-06 19:43:29,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:29,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 19:43:29,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 19:43:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-12-06 19:43:29,457 INFO L87 Difference]: Start difference. First operand 377 states and 401 transitions. Second operand has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 19:43:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:30,054 INFO L93 Difference]: Finished difference Result 382 states and 405 transitions. [2021-12-06 19:43:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:43:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 190 [2021-12-06 19:43:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:30,056 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:43:30,056 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:43:30,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:43:30,057 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:30,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2104 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:43:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:43:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:43:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0848056537102473) internal successors, (307), 283 states have internal predecessors, (307), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:43:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 400 transitions. [2021-12-06 19:43:30,070 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 400 transitions. Word has length 190 [2021-12-06 19:43:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:30,071 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 400 transitions. [2021-12-06 19:43:30,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 19:43:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 400 transitions. [2021-12-06 19:43:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-06 19:43:30,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:30,072 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:30,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 19:43:30,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:30,272 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash -168940282, now seen corresponding path program 23 times [2021-12-06 19:43:30,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651912848] [2021-12-06 19:43:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:30,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:30,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:30,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072624286] [2021-12-06 19:43:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:43:30,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:30,280 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:30,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 19:43:32,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 19:43:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 19:43:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 48 proven. 1104 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-06 19:43:32,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:32,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651912848] [2021-12-06 19:43:32,661 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072624286] [2021-12-06 19:43:32,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072624286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:32,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:32,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-06 19:43:32,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215146576] [2021-12-06 19:43:32,661 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:32,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:43:32,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:32,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:43:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:43:32,662 INFO L87 Difference]: Start difference. First operand 377 states and 400 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 19:43:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:33,291 INFO L93 Difference]: Finished difference Result 382 states and 404 transitions. [2021-12-06 19:43:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 19:43:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 198 [2021-12-06 19:43:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:33,293 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:43:33,293 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:43:33,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:43:33,293 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:33,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2266 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:43:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:43:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:43:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0812720848056536) internal successors, (306), 283 states have internal predecessors, (306), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:43:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 399 transitions. [2021-12-06 19:43:33,307 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 399 transitions. Word has length 198 [2021-12-06 19:43:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:33,307 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 399 transitions. [2021-12-06 19:43:33,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 19:43:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 399 transitions. [2021-12-06 19:43:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-06 19:43:33,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:33,308 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:33,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 19:43:33,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:33,509 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1439593620, now seen corresponding path program 24 times [2021-12-06 19:43:33,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56798432] [2021-12-06 19:43:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:33,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:33,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:33,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221737184] [2021-12-06 19:43:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:43:33,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:33,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:33,516 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 19:43:44,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-06 19:43:44,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:44,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 19:43:44,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 50 proven. 1200 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2021-12-06 19:43:45,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:47,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:47,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56798432] [2021-12-06 19:43:47,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:47,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221737184] [2021-12-06 19:43:47,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221737184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:47,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-12-06 19:43:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226989300] [2021-12-06 19:43:47,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:47,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:43:47,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:43:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 19:43:47,313 INFO L87 Difference]: Start difference. First operand 377 states and 399 transitions. Second operand has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-06 19:43:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:48,066 INFO L93 Difference]: Finished difference Result 382 states and 403 transitions. [2021-12-06 19:43:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:43:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 206 [2021-12-06 19:43:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:48,068 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:43:48,068 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:43:48,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=702, Invalid=2604, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 19:43:48,070 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2434 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:48,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2434 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:43:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:43:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:43:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0777385159010602) internal successors, (305), 283 states have internal predecessors, (305), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:43:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 398 transitions. [2021-12-06 19:43:48,083 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 398 transitions. Word has length 206 [2021-12-06 19:43:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:48,084 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 398 transitions. [2021-12-06 19:43:48,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-06 19:43:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 398 transitions. [2021-12-06 19:43:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 19:43:48,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:48,085 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:48,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 19:43:48,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 19:43:48,286 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1619319854, now seen corresponding path program 25 times [2021-12-06 19:43:48,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:48,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796444352] [2021-12-06 19:43:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:48,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:48,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098285411] [2021-12-06 19:43:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:43:48,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:48,298 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:48,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 19:43:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 19:43:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 52 proven. 1300 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2021-12-06 19:43:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:50,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796444352] [2021-12-06 19:43:50,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098285411] [2021-12-06 19:43:50,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098285411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:50,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:50,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-06 19:43:50,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833485288] [2021-12-06 19:43:50,045 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:50,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 19:43:50,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 19:43:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:43:50,046 INFO L87 Difference]: Start difference. First operand 377 states and 398 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 19:43:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:50,822 INFO L93 Difference]: Finished difference Result 382 states and 402 transitions. [2021-12-06 19:43:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:43:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 214 [2021-12-06 19:43:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:50,824 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:43:50,824 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:43:50,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 19:43:50,825 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 2 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:50,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2608 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:43:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:43:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:43:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0742049469964665) internal successors, (304), 283 states have internal predecessors, (304), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:43:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 397 transitions. [2021-12-06 19:43:50,838 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 397 transitions. Word has length 214 [2021-12-06 19:43:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:50,838 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 397 transitions. [2021-12-06 19:43:50,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 19:43:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 397 transitions. [2021-12-06 19:43:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 19:43:50,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:50,840 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:50,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 19:43:51,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 19:43:51,041 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash -252643784, now seen corresponding path program 26 times [2021-12-06 19:43:51,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:51,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645935047] [2021-12-06 19:43:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:51,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:51,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:51,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82549733] [2021-12-06 19:43:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:43:51,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:51,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:51,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 19:43:52,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:43:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-06 19:43:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 54 proven. 1404 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2021-12-06 19:43:52,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:52,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645935047] [2021-12-06 19:43:52,795 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82549733] [2021-12-06 19:43:52,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82549733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:52,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:52,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-06 19:43:52,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169799545] [2021-12-06 19:43:52,795 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:52,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:43:52,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:43:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 19:43:52,797 INFO L87 Difference]: Start difference. First operand 377 states and 397 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-06 19:43:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:53,575 INFO L93 Difference]: Finished difference Result 382 states and 401 transitions. [2021-12-06 19:43:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:43:53,576 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 222 [2021-12-06 19:43:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:53,577 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:43:53,577 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:43:53,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:43:53,578 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2670 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:53,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2788 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:43:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:43:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:43:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0706713780918728) internal successors, (303), 283 states have internal predecessors, (303), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:43:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 396 transitions. [2021-12-06 19:43:53,591 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 396 transitions. Word has length 222 [2021-12-06 19:43:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:53,591 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 396 transitions. [2021-12-06 19:43:53,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-06 19:43:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 396 transitions. [2021-12-06 19:43:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 19:43:53,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:53,592 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:53,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 19:43:53,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 19:43:53,793 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash 867762846, now seen corresponding path program 27 times [2021-12-06 19:43:53,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:53,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781123112] [2021-12-06 19:43:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:53,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:53,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:43:53,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73124725] [2021-12-06 19:43:53,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:43:53,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:53,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:53,806 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:53,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 19:43:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-06 19:43:56,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 19:43:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 56 proven. 1512 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2021-12-06 19:43:57,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:59,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781123112] [2021-12-06 19:43:59,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:43:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73124725] [2021-12-06 19:43:59,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73124725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:59,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:43:59,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-12-06 19:43:59,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430909154] [2021-12-06 19:43:59,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:59,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:43:59,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:43:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=2925, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 19:43:59,713 INFO L87 Difference]: Start difference. First operand 377 states and 396 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-06 19:44:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:00,641 INFO L93 Difference]: Finished difference Result 382 states and 400 transitions. [2021-12-06 19:44:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 19:44:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 230 [2021-12-06 19:44:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:00,643 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:44:00,643 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:44:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=867, Invalid=3165, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 19:44:00,644 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 2 mSDsluCounter, 2852 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:00,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2974 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:44:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:44:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:44:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0671378091872792) internal successors, (302), 283 states have internal predecessors, (302), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:44:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 395 transitions. [2021-12-06 19:44:00,657 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 395 transitions. Word has length 230 [2021-12-06 19:44:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:00,657 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 395 transitions. [2021-12-06 19:44:00,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-06 19:44:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 395 transitions. [2021-12-06 19:44:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 19:44:00,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:00,659 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:00,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 19:44:00,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 19:44:00,860 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1996048644, now seen corresponding path program 28 times [2021-12-06 19:44:00,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:00,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526377296] [2021-12-06 19:44:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:00,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:00,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:44:00,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558226338] [2021-12-06 19:44:00,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:44:00,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:00,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:00,877 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:00,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 19:44:07,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:44:07,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 19:44:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 58 proven. 1624 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2021-12-06 19:44:07,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:08,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526377296] [2021-12-06 19:44:08,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:44:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558226338] [2021-12-06 19:44:08,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558226338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:08,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:44:08,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-12-06 19:44:08,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588645767] [2021-12-06 19:44:08,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:08,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:44:08,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:44:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:44:08,068 INFO L87 Difference]: Start difference. First operand 377 states and 395 transitions. Second operand has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 19:44:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:08,963 INFO L93 Difference]: Finished difference Result 382 states and 399 transitions. [2021-12-06 19:44:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:44:08,963 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 238 [2021-12-06 19:44:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:08,965 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:44:08,965 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:44:08,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:44:08,966 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 2 mSDsluCounter, 3040 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:08,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3166 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:44:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:44:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:44:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0636042402826855) internal successors, (301), 283 states have internal predecessors, (301), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:44:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 394 transitions. [2021-12-06 19:44:08,983 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 394 transitions. Word has length 238 [2021-12-06 19:44:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:08,983 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 394 transitions. [2021-12-06 19:44:08,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 19:44:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 394 transitions. [2021-12-06 19:44:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-06 19:44:08,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:08,985 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:08,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 19:44:09,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:09,186 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1138215274, now seen corresponding path program 29 times [2021-12-06 19:44:09,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065613890] [2021-12-06 19:44:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:09,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:09,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:44:09,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262056327] [2021-12-06 19:44:09,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:44:09,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:09,216 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:09,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 19:44:11,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-12-06 19:44:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:11,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-06 19:44:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 60 proven. 1740 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2021-12-06 19:44:12,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:12,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065613890] [2021-12-06 19:44:12,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:44:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262056327] [2021-12-06 19:44:12,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262056327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:12,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:44:12,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-12-06 19:44:12,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454381431] [2021-12-06 19:44:12,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:12,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 19:44:12,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 19:44:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 19:44:12,423 INFO L87 Difference]: Start difference. First operand 377 states and 394 transitions. Second operand has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-06 19:44:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:13,339 INFO L93 Difference]: Finished difference Result 382 states and 398 transitions. [2021-12-06 19:44:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 19:44:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 246 [2021-12-06 19:44:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:13,341 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:44:13,341 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:44:13,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 19:44:13,342 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3234 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:13,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3364 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 19:44:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:44:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:44:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0600706713780919) internal successors, (300), 283 states have internal predecessors, (300), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:44:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 393 transitions. [2021-12-06 19:44:13,355 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 393 transitions. Word has length 246 [2021-12-06 19:44:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:13,355 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 393 transitions. [2021-12-06 19:44:13,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-06 19:44:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 393 transitions. [2021-12-06 19:44:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-06 19:44:13,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:13,357 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:13,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 19:44:13,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 19:44:13,557 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:13,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1652915248, now seen corresponding path program 30 times [2021-12-06 19:44:13,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:13,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34324136] [2021-12-06 19:44:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:13,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:13,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:44:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235299665] [2021-12-06 19:44:13,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:44:13,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:13,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:13,568 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:13,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 19:44:51,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-12-06 19:44:51,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:51,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-06 19:44:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 62 proven. 1860 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-12-06 19:44:52,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:52,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34324136] [2021-12-06 19:44:52,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:44:52,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235299665] [2021-12-06 19:44:52,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235299665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:52,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:44:52,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-12-06 19:44:52,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433235092] [2021-12-06 19:44:52,562 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:52,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 19:44:52,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 19:44:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:44:52,563 INFO L87 Difference]: Start difference. First operand 377 states and 393 transitions. Second operand has 36 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 19:44:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:53,522 INFO L93 Difference]: Finished difference Result 382 states and 397 transitions. [2021-12-06 19:44:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:44:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 254 [2021-12-06 19:44:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:53,523 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:44:53,523 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:44:53,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 19:44:53,524 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:53,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3568 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 19:44:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:44:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:44:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0565371024734982) internal successors, (299), 283 states have internal predecessors, (299), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:44:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 392 transitions. [2021-12-06 19:44:53,542 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 392 transitions. Word has length 254 [2021-12-06 19:44:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:53,543 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 392 transitions. [2021-12-06 19:44:53,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 19:44:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 392 transitions. [2021-12-06 19:44:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-06 19:44:53,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:53,544 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:53,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 19:44:53,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 19:44:53,745 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash 17266742, now seen corresponding path program 31 times [2021-12-06 19:44:53,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:53,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2374586] [2021-12-06 19:44:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:53,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:53,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:44:53,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124812692] [2021-12-06 19:44:53,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:44:53,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:53,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:53,782 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:53,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 19:44:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-06 19:44:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 64 proven. 1984 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2021-12-06 19:44:55,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:55,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:55,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2374586] [2021-12-06 19:44:55,725 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:44:55,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124812692] [2021-12-06 19:44:55,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124812692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:55,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:44:55,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-12-06 19:44:55,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872379332] [2021-12-06 19:44:55,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:55,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 19:44:55,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 19:44:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 19:44:55,726 INFO L87 Difference]: Start difference. First operand 377 states and 392 transitions. Second operand has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 36 states have internal predecessors, (104), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 19:44:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:56,740 INFO L93 Difference]: Finished difference Result 382 states and 396 transitions. [2021-12-06 19:44:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 19:44:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 36 states have internal predecessors, (104), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 262 [2021-12-06 19:44:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:56,743 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:44:56,743 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:44:56,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:44:56,743 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 2 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:56,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3778 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 19:44:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:44:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:44:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0530035335689045) internal successors, (298), 283 states have internal predecessors, (298), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:44:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 391 transitions. [2021-12-06 19:44:56,757 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 391 transitions. Word has length 262 [2021-12-06 19:44:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:56,757 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 391 transitions. [2021-12-06 19:44:56,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 36 states have internal predecessors, (104), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 19:44:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 391 transitions. [2021-12-06 19:44:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-06 19:44:56,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:56,758 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:56,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 19:44:56,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 19:44:56,959 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1705289372, now seen corresponding path program 32 times [2021-12-06 19:44:56,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:56,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299905136] [2021-12-06 19:44:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:56,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:56,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:44:56,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349551311] [2021-12-06 19:44:56,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:44:56,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:56,971 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:56,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 19:44:58,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:44:58,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-06 19:44:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 66 proven. 2112 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2021-12-06 19:44:58,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:59,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299905136] [2021-12-06 19:44:59,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:44:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349551311] [2021-12-06 19:44:59,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349551311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:59,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:44:59,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-12-06 19:44:59,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485734519] [2021-12-06 19:44:59,110 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:59,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 19:44:59,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 19:44:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 19:44:59,111 INFO L87 Difference]: Start difference. First operand 377 states and 391 transitions. Second operand has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 19:45:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:00,233 INFO L93 Difference]: Finished difference Result 382 states and 395 transitions. [2021-12-06 19:45:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 19:45:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 270 [2021-12-06 19:45:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:00,234 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:45:00,235 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:45:00,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:45:00,235 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 3852 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3994 SdHoareTripleChecker+Invalid, 2421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:00,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3994 Invalid, 2421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:45:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:45:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:45:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0494699646643109) internal successors, (297), 283 states have internal predecessors, (297), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:45:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 390 transitions. [2021-12-06 19:45:00,252 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 390 transitions. Word has length 270 [2021-12-06 19:45:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:00,253 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 390 transitions. [2021-12-06 19:45:00,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 19:45:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 390 transitions. [2021-12-06 19:45:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-06 19:45:00,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:00,254 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:00,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-06 19:45:00,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 19:45:00,455 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1014501122, now seen corresponding path program 33 times [2021-12-06 19:45:00,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:00,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85401529] [2021-12-06 19:45:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:00,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:00,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:45:00,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569264560] [2021-12-06 19:45:00,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:45:00,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:00,463 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:00,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 19:46:33,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-06 19:46:33,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:46:33,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 19:46:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:46:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 68 proven. 2244 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2021-12-06 19:46:34,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:46:34,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85401529] [2021-12-06 19:46:34,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:46:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569264560] [2021-12-06 19:46:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569264560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:46:34,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:46:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-12-06 19:46:34,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096730832] [2021-12-06 19:46:34,906 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:46:34,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 19:46:34,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 19:46:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:46:34,907 INFO L87 Difference]: Start difference. First operand 377 states and 390 transitions. Second operand has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-06 19:46:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:36,050 INFO L93 Difference]: Finished difference Result 382 states and 394 transitions. [2021-12-06 19:46:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 19:46:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 278 [2021-12-06 19:46:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:36,052 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:46:36,052 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:46:36,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 19:46:36,053 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2 mSDsluCounter, 4070 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:36,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4216 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:46:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:46:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:46:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0459363957597174) internal successors, (296), 283 states have internal predecessors, (296), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:46:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 389 transitions. [2021-12-06 19:46:36,065 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 389 transitions. Word has length 278 [2021-12-06 19:46:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:36,065 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 389 transitions. [2021-12-06 19:46:36,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-06 19:46:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 389 transitions. [2021-12-06 19:46:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-12-06 19:46:36,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:36,067 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:36,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-06 19:46:36,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 19:46:36,268 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038120, now seen corresponding path program 34 times [2021-12-06 19:46:36,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:36,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151763953] [2021-12-06 19:46:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:36,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:36,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:46:36,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646964499] [2021-12-06 19:46:36,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:46:36,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:46:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:46:36,300 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:46:36,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 19:46:52,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:46:52,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:46:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-06 19:46:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:46:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 70 proven. 2380 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2021-12-06 19:46:52,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:46:53,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151763953] [2021-12-06 19:46:53,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:46:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646964499] [2021-12-06 19:46:53,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646964499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:46:53,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:46:53,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-12-06 19:46:53,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660046176] [2021-12-06 19:46:53,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:46:53,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 19:46:53,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 19:46:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:46:53,218 INFO L87 Difference]: Start difference. First operand 377 states and 389 transitions. Second operand has 40 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 19:46:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:54,390 INFO L93 Difference]: Finished difference Result 382 states and 393 transitions. [2021-12-06 19:46:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 19:46:54,390 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 286 [2021-12-06 19:46:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:54,392 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:46:54,392 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:46:54,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 19:46:54,392 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 2 mSDsluCounter, 4294 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4444 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:54,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4444 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:46:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:46:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:46:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0424028268551238) internal successors, (295), 283 states have internal predecessors, (295), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:46:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 388 transitions. [2021-12-06 19:46:54,405 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 388 transitions. Word has length 286 [2021-12-06 19:46:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:54,405 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 388 transitions. [2021-12-06 19:46:54,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 19:46:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 388 transitions. [2021-12-06 19:46:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-06 19:46:54,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:54,407 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:54,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-06 19:46:54,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 19:46:54,608 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1733922254, now seen corresponding path program 35 times [2021-12-06 19:46:54,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:54,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935864373] [2021-12-06 19:46:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:54,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:54,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:46:54,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186653370] [2021-12-06 19:46:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:46:54,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:46:54,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:46:54,646 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:46:54,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 19:49:02,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-12-06 19:49:02,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:49:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-06 19:49:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:49:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 72 proven. 2520 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2021-12-06 19:49:03,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:49:03,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:49:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935864373] [2021-12-06 19:49:03,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:49:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186653370] [2021-12-06 19:49:03,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186653370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:49:03,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:49:03,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-12-06 19:49:03,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950290509] [2021-12-06 19:49:03,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:49:03,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 19:49:03,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:49:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 19:49:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 19:49:03,849 INFO L87 Difference]: Start difference. First operand 377 states and 388 transitions. Second operand has 41 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-06 19:49:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:49:05,292 INFO L93 Difference]: Finished difference Result 382 states and 392 transitions. [2021-12-06 19:49:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 19:49:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 294 [2021-12-06 19:49:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:49:05,294 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:49:05,294 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:49:05,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 19:49:05,294 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4678 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:49:05,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4678 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 19:49:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:49:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:49:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.03886925795053) internal successors, (294), 283 states have internal predecessors, (294), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:49:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 387 transitions. [2021-12-06 19:49:05,306 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 387 transitions. Word has length 294 [2021-12-06 19:49:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:49:05,307 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 387 transitions. [2021-12-06 19:49:05,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-06 19:49:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 387 transitions. [2021-12-06 19:49:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-06 19:49:05,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:49:05,308 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1] [2021-12-06 19:49:05,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 19:49:05,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:05,510 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:49:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:49:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash -5004236, now seen corresponding path program 36 times [2021-12-06 19:49:05,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:49:05,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803580142] [2021-12-06 19:49:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:49:05,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:49:05,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:49:05,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856393311] [2021-12-06 19:49:05,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:49:05,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:05,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:49:05,543 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:49:05,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 19:49:15,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-12-06 19:49:15,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:49:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-06 19:49:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:49:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 74 proven. 2664 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2021-12-06 19:49:16,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:49:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:49:17,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803580142] [2021-12-06 19:49:17,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:49:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856393311] [2021-12-06 19:49:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856393311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:49:17,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:49:17,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-12-06 19:49:17,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114735358] [2021-12-06 19:49:17,045 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:49:17,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:49:17,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:49:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:49:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 19:49:17,047 INFO L87 Difference]: Start difference. First operand 377 states and 387 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 38 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 19:49:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:49:18,466 INFO L93 Difference]: Finished difference Result 382 states and 391 transitions. [2021-12-06 19:49:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 19:49:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 38 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 302 [2021-12-06 19:49:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:49:18,468 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:49:18,468 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:49:18,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:49:18,469 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2 mSDsluCounter, 4760 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4918 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:49:18,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4918 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 19:49:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:49:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:49:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0353356890459364) internal successors, (293), 283 states have internal predecessors, (293), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:49:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 386 transitions. [2021-12-06 19:49:18,485 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 386 transitions. Word has length 302 [2021-12-06 19:49:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:49:18,485 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 386 transitions. [2021-12-06 19:49:18,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 38 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 19:49:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 386 transitions. [2021-12-06 19:49:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-06 19:49:18,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:49:18,487 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1] [2021-12-06 19:49:18,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 19:49:18,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:18,688 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:49:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:49:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1831078758, now seen corresponding path program 37 times [2021-12-06 19:49:18,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:49:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273569851] [2021-12-06 19:49:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:49:18,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:49:18,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:49:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879948944] [2021-12-06 19:49:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:49:18,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:49:18,723 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:49:18,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 19:49:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:49:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 19:49:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:49:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 76 proven. 2812 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2021-12-06 19:49:21,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:49:26,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:49:26,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273569851] [2021-12-06 19:49:26,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:49:26,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879948944] [2021-12-06 19:49:26,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879948944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:49:26,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:49:26,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-12-06 19:49:26,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332406365] [2021-12-06 19:49:26,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:49:26,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 19:49:26,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:49:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 19:49:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1537, Invalid=5105, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 19:49:26,091 INFO L87 Difference]: Start difference. First operand 377 states and 386 transitions. Second operand has 43 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 39 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-06 19:49:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:49:27,670 INFO L93 Difference]: Finished difference Result 382 states and 390 transitions. [2021-12-06 19:49:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 19:49:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 39 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 310 [2021-12-06 19:49:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:49:27,672 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:49:27,672 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:49:27,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1547, Invalid=5425, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 19:49:27,673 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 2 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 3166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5164 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:49:27,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5164 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3166 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:49:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:49:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:49:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0318021201413428) internal successors, (292), 283 states have internal predecessors, (292), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:49:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 385 transitions. [2021-12-06 19:49:27,685 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 385 transitions. Word has length 310 [2021-12-06 19:49:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:49:27,685 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 385 transitions. [2021-12-06 19:49:27,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 39 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-06 19:49:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 385 transitions. [2021-12-06 19:49:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-12-06 19:49:27,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:49:27,687 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1] [2021-12-06 19:49:27,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 19:49:27,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:27,888 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:49:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:49:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -201818368, now seen corresponding path program 38 times [2021-12-06 19:49:27,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:49:27,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394127020] [2021-12-06 19:49:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:49:27,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:49:27,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:49:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101825677] [2021-12-06 19:49:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:49:27,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:49:27,922 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:49:27,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 19:49:29,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:49:29,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:49:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-06 19:49:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:49:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 78 proven. 2964 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2021-12-06 19:49:30,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:49:30,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:49:30,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394127020] [2021-12-06 19:49:30,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:49:30,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101825677] [2021-12-06 19:49:30,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101825677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:49:30,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:49:30,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-12-06 19:49:30,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756115318] [2021-12-06 19:49:30,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:49:30,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 19:49:30,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:49:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 19:49:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:49:30,532 INFO L87 Difference]: Start difference. First operand 377 states and 385 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 40 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-06 19:49:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:49:32,064 INFO L93 Difference]: Finished difference Result 382 states and 389 transitions. [2021-12-06 19:49:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:49:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 40 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Word has length 318 [2021-12-06 19:49:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:49:32,066 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:49:32,066 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:49:32,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 19:49:32,067 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 2 mSDsluCounter, 5250 mSDsCounter, 0 mSdLazyCounter, 3327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:49:32,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5416 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3327 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:49:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:49:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:49:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.028268551236749) internal successors, (291), 283 states have internal predecessors, (291), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:49:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 384 transitions. [2021-12-06 19:49:32,079 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 384 transitions. Word has length 318 [2021-12-06 19:49:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:49:32,079 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 384 transitions. [2021-12-06 19:49:32,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 40 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-06 19:49:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 384 transitions. [2021-12-06 19:49:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-06 19:49:32,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:49:32,081 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1] [2021-12-06 19:49:32,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 19:49:32,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:32,282 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:49:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:49:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1882145638, now seen corresponding path program 39 times [2021-12-06 19:49:32,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:49:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869515774] [2021-12-06 19:49:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:49:32,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:49:32,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:49:32,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794263514] [2021-12-06 19:49:32,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:49:32,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:32,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:49:32,316 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:49:32,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 19:49:47,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-12-06 19:49:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:49:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 164 conjunts are in the unsatisfiable core [2021-12-06 19:49:47,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:49:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 80 proven. 3120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2021-12-06 19:49:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:49:48,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:49:48,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869515774] [2021-12-06 19:49:48,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:49:48,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794263514] [2021-12-06 19:49:48,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794263514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:49:48,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:49:48,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-12-06 19:49:48,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54204446] [2021-12-06 19:49:48,550 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:49:48,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 19:49:48,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:49:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 19:49:48,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 19:49:48,551 INFO L87 Difference]: Start difference. First operand 377 states and 384 transitions. Second operand has 45 states, 44 states have (on average 2.909090909090909) internal successors, (128), 44 states have internal predecessors, (128), 41 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 19:49:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:49:50,140 INFO L93 Difference]: Finished difference Result 382 states and 388 transitions. [2021-12-06 19:49:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 19:49:50,140 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.909090909090909) internal successors, (128), 44 states have internal predecessors, (128), 41 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 326 [2021-12-06 19:49:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:49:50,142 INFO L225 Difference]: With dead ends: 382 [2021-12-06 19:49:50,142 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 19:49:50,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:49:50,142 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 2 mSDsluCounter, 5504 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5674 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:49:50,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5674 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3492 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:49:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 19:49:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-06 19:49:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0247349823321554) internal successors, (290), 283 states have internal predecessors, (290), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 19:49:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 383 transitions. [2021-12-06 19:49:50,155 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 383 transitions. Word has length 326 [2021-12-06 19:49:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:49:50,155 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 383 transitions. [2021-12-06 19:49:50,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.909090909090909) internal successors, (128), 44 states have internal predecessors, (128), 41 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 19:49:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 383 transitions. [2021-12-06 19:49:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-06 19:49:50,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:49:50,157 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1] [2021-12-06 19:49:50,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 19:49:50,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 19:49:50,358 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:49:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:49:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash -827964980, now seen corresponding path program 40 times [2021-12-06 19:49:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:49:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015726407] [2021-12-06 19:49:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:49:50,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:49:50,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:49:50,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941996761] [2021-12-06 19:49:50,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:49:50,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:49:50,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:49:50,367 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:49:50,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d195a08-122f-4d59-84ff-20d34e067bf3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process