./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:17,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:17,486 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:47:17,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:17,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:17,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:17,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:17,516 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:17,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:17,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:17,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:17,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:17,519 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:17,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:17,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:47:17,521 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:17,521 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:17,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:17,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:17,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:47:17,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:17,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:47:17,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:17,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:47:17,526 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:17,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:17,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:17,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:17,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:17,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:17,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:17,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:47:17,531 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:17,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:17,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:17,532 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:47:17,533 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:17,533 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:17,533 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:17,534 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2023-11-19 07:47:17,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:17,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:17,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:17,833 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:17,834 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:17,835 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-11-19 07:47:21,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:21,320 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:21,320 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-11-19 07:47:21,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/data/c12a3162b/ec1e9853e5b3478ebf17e6f477f1fe63/FLAG1238c2674 [2023-11-19 07:47:21,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/data/c12a3162b/ec1e9853e5b3478ebf17e6f477f1fe63 [2023-11-19 07:47:21,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:21,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:21,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:21,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:21,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:21,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f1b77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21, skipping insertion in model container [2023-11-19 07:47:21,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:21,538 WARN L240 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_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2023-11-19 07:47:21,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:21,568 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:21,581 WARN L240 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_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2023-11-19 07:47:21,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:21,605 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:21,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21 WrapperNode [2023-11-19 07:47:21,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:21,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:21,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:21,607 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:21,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,650 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2023-11-19 07:47:21,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:21,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:21,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:21,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:21,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,693 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:21,694 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:21,695 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:21,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:21,696 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (1/1) ... [2023-11-19 07:47:21,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:21,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:21,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:47:21,789 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:47:21,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:21,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:21,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:47:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:47:21,872 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:21,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:22,085 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:22,096 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:22,096 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:47:22,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:22 BoogieIcfgContainer [2023-11-19 07:47:22,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:22,102 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:22,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:22,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:22,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:21" (1/3) ... [2023-11-19 07:47:22,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d50b63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:22, skipping insertion in model container [2023-11-19 07:47:22,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:21" (2/3) ... [2023-11-19 07:47:22,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d50b63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:22, skipping insertion in model container [2023-11-19 07:47:22,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:22" (3/3) ... [2023-11-19 07:47:22,114 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2023-11-19 07:47:22,140 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:22,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:47:22,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:22,224 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e2dba37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:22,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:47:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:47:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:47:22,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:22,245 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:22,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:22,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-11-19 07:47:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:22,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83303253] [2023-11-19 07:47:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:22,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:22,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83303253] [2023-11-19 07:47:22,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:47:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593571725] [2023-11-19 07:47:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:22,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:22,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:22,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:22,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:47:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:22,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:47:22,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:47:22,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:22,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593571725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:22,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:22,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:22,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461097661] [2023-11-19 07:47:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:22,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:47:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:47:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:47:22,613 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:47:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:22,638 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-11-19 07:47:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:47:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-11-19 07:47:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:22,648 INFO L225 Difference]: With dead ends: 67 [2023-11-19 07:47:22,648 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 07:47:22,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:47:22,655 INFO L413 NwaCegarLoop]: 44 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, 44 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 [2023-11-19 07:47:22,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 07:47:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-19 07:47:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:47:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-11-19 07:47:22,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-11-19 07:47:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:22,693 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-11-19 07:47:22,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:47:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-11-19 07:47:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 07:47:22,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:22,696 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:22,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:47:22,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:22,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-11-19 07:47:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:22,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783829544] [2023-11-19 07:47:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:22,976 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:22,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235282711] [2023-11-19 07:47:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:22,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:22,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:22,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:23,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:23,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:47:23,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:47:23,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:23,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783829544] [2023-11-19 07:47:23,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235282711] [2023-11-19 07:47:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235282711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:23,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:23,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:47:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934962912] [2023-11-19 07:47:23,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:23,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:47:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:47:23,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:23,391 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:47:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:23,523 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-11-19 07:47:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:47:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-11-19 07:47:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:23,526 INFO L225 Difference]: With dead ends: 50 [2023-11-19 07:47:23,526 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:47:23,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:47:23,529 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:23,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:47:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-11-19 07:47:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:47:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-11-19 07:47:23,547 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 30 [2023-11-19 07:47:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:23,547 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-11-19 07:47:23,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:47:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-11-19 07:47:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 07:47:23,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:23,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:23,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:23,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:23,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:23,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-11-19 07:47:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340898247] [2023-11-19 07:47:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:23,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:23,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636535474] [2023-11-19 07:47:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:23,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:23,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:23,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:47:23,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:47:23,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:47:24,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340898247] [2023-11-19 07:47:24,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636535474] [2023-11-19 07:47:24,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636535474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:24,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:24,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-19 07:47:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851748942] [2023-11-19 07:47:24,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:47:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:47:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:47:24,174 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:47:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:24,412 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-11-19 07:47:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:47:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-19 07:47:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:24,416 INFO L225 Difference]: With dead ends: 99 [2023-11-19 07:47:24,416 INFO L226 Difference]: Without dead ends: 92 [2023-11-19 07:47:24,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:47:24,418 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 62 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:24,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 198 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-19 07:47:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-11-19 07:47:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 07:47:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-11-19 07:47:24,452 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-11-19 07:47:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:24,453 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-11-19 07:47:24,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:47:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-11-19 07:47:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:47:24,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:24,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:24,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:24,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:24,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-11-19 07:47:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725150460] [2023-11-19 07:47:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:24,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:24,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000166091] [2023-11-19 07:47:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:24,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:24,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:47:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:24,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:47:24,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:47:25,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:47:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:25,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725150460] [2023-11-19 07:47:25,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:25,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000166091] [2023-11-19 07:47:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000166091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:25,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2023-11-19 07:47:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108915079] [2023-11-19 07:47:25,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:47:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:47:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:47:25,678 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:47:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:26,742 INFO L93 Difference]: Finished difference Result 125 states and 174 transitions. [2023-11-19 07:47:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:47:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-11-19 07:47:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:26,750 INFO L225 Difference]: With dead ends: 125 [2023-11-19 07:47:26,750 INFO L226 Difference]: Without dead ends: 123 [2023-11-19 07:47:26,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-11-19 07:47:26,760 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 95 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:26,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 306 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:47:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-19 07:47:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2023-11-19 07:47:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 73 states have internal predecessors, (91), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-19 07:47:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2023-11-19 07:47:26,833 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 38 [2023-11-19 07:47:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:26,834 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2023-11-19 07:47:26,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:47:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2023-11-19 07:47:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:47:26,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:26,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:26,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:27,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:27,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-11-19 07:47:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:27,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805615768] [2023-11-19 07:47:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:27,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:27,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205582637] [2023-11-19 07:47:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:27,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:27,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:27,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:47:27,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 07:47:27,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805615768] [2023-11-19 07:47:27,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205582637] [2023-11-19 07:47:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205582637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:27,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:27,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504171404] [2023-11-19 07:47:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:27,236 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:47:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:27,362 INFO L93 Difference]: Finished difference Result 148 states and 212 transitions. [2023-11-19 07:47:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-11-19 07:47:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:27,366 INFO L225 Difference]: With dead ends: 148 [2023-11-19 07:47:27,366 INFO L226 Difference]: Without dead ends: 146 [2023-11-19 07:47:27,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:27,368 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:27,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-19 07:47:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2023-11-19 07:47:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 90 states have internal predecessors, (115), 45 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-19 07:47:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 204 transitions. [2023-11-19 07:47:27,449 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 204 transitions. Word has length 43 [2023-11-19 07:47:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:27,450 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 204 transitions. [2023-11-19 07:47:27,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:47:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 204 transitions. [2023-11-19 07:47:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:47:27,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:27,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:27,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:27,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:27,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:27,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-11-19 07:47:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107036148] [2023-11-19 07:47:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:27,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:27,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603221404] [2023-11-19 07:47:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:27,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:27,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:27,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:27,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:47:27,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:47:28,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:47:28,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107036148] [2023-11-19 07:47:28,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603221404] [2023-11-19 07:47:28,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603221404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:28,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:28,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2023-11-19 07:47:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592755093] [2023-11-19 07:47:28,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:28,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:47:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:47:28,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:47:28,498 INFO L87 Difference]: Start difference. First operand 140 states and 204 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 07:47:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:30,333 INFO L93 Difference]: Finished difference Result 276 states and 413 transitions. [2023-11-19 07:47:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:47:30,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-11-19 07:47:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:30,337 INFO L225 Difference]: With dead ends: 276 [2023-11-19 07:47:30,338 INFO L226 Difference]: Without dead ends: 274 [2023-11-19 07:47:30,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:47:30,340 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 173 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:30,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 260 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:47:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-19 07:47:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 208. [2023-11-19 07:47:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 139 states have (on average 1.2949640287769784) internal successors, (180), 140 states have internal predecessors, (180), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-19 07:47:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 301 transitions. [2023-11-19 07:47:30,459 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 301 transitions. Word has length 43 [2023-11-19 07:47:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:30,461 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 301 transitions. [2023-11-19 07:47:30,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 07:47:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 301 transitions. [2023-11-19 07:47:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:47:30,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:30,464 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:30,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:47:30,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-11-19 07:47:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:30,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831123848] [2023-11-19 07:47:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:30,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:30,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756617730] [2023-11-19 07:47:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:30,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:30,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:30,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:30,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:47:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:30,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:47:30,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 07:47:30,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831123848] [2023-11-19 07:47:30,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756617730] [2023-11-19 07:47:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756617730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:30,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238481194] [2023-11-19 07:47:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:30,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:30,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:30,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:30,827 INFO L87 Difference]: Start difference. First operand 208 states and 301 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:47:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:31,035 INFO L93 Difference]: Finished difference Result 305 states and 467 transitions. [2023-11-19 07:47:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:31,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-11-19 07:47:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:31,039 INFO L225 Difference]: With dead ends: 305 [2023-11-19 07:47:31,040 INFO L226 Difference]: Without dead ends: 303 [2023-11-19 07:47:31,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:31,042 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 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 [2023-11-19 07:47:31,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-19 07:47:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 282. [2023-11-19 07:47:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 156 states have (on average 1.2628205128205128) internal successors, (197), 171 states have internal predecessors, (197), 117 states have call successors, (117), 8 states have call predecessors, (117), 8 states have return successors, (116), 102 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-19 07:47:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 430 transitions. [2023-11-19 07:47:31,212 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 430 transitions. Word has length 48 [2023-11-19 07:47:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:31,212 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 430 transitions. [2023-11-19 07:47:31,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:47:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 430 transitions. [2023-11-19 07:47:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:47:31,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:31,214 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:31,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:47:31,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:31,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1930446133, now seen corresponding path program 2 times [2023-11-19 07:47:31,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:31,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017718413] [2023-11-19 07:47:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:31,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:31,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46455430] [2023-11-19 07:47:31,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:31,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:31,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:47:31,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:47:31,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:31,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:31,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 07:47:31,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:31,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017718413] [2023-11-19 07:47:31,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:31,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46455430] [2023-11-19 07:47:31,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46455430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:31,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56623497] [2023-11-19 07:47:31,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:31,574 INFO L87 Difference]: Start difference. First operand 282 states and 430 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:47:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:31,749 INFO L93 Difference]: Finished difference Result 368 states and 553 transitions. [2023-11-19 07:47:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:47:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-11-19 07:47:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:31,753 INFO L225 Difference]: With dead ends: 368 [2023-11-19 07:47:31,753 INFO L226 Difference]: Without dead ends: 170 [2023-11-19 07:47:31,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:31,757 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:31,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 143 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-19 07:47:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 162. [2023-11-19 07:47:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 93 states have internal predecessors, (100), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-19 07:47:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 237 transitions. [2023-11-19 07:47:31,857 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 237 transitions. Word has length 48 [2023-11-19 07:47:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:31,857 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 237 transitions. [2023-11-19 07:47:31,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 07:47:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 237 transitions. [2023-11-19 07:47:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 07:47:31,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:31,859 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:31,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:32,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:32,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:32,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-11-19 07:47:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720111440] [2023-11-19 07:47:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:32,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:32,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998667174] [2023-11-19 07:47:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:32,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:32,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:32,097 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:32,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:47:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:32,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-19 07:47:32,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 07:47:32,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 07:47:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720111440] [2023-11-19 07:47:33,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998667174] [2023-11-19 07:47:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998667174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:33,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:33,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-11-19 07:47:33,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057707046] [2023-11-19 07:47:33,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:33,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:47:33,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:47:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:47:33,871 INFO L87 Difference]: Start difference. First operand 162 states and 237 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 07:47:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:41,046 INFO L93 Difference]: Finished difference Result 386 states and 595 transitions. [2023-11-19 07:47:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-19 07:47:41,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 60 [2023-11-19 07:47:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:41,051 INFO L225 Difference]: With dead ends: 386 [2023-11-19 07:47:41,051 INFO L226 Difference]: Without dead ends: 378 [2023-11-19 07:47:41,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=578, Invalid=2728, Unknown=0, NotChecked=0, Total=3306 [2023-11-19 07:47:41,054 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 217 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:41,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 718 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-19 07:47:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-19 07:47:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 227. [2023-11-19 07:47:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 128 states have (on average 1.2265625) internal successors, (157), 135 states have internal predecessors, (157), 89 states have call successors, (89), 9 states have call predecessors, (89), 9 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-19 07:47:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2023-11-19 07:47:41,243 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 60 [2023-11-19 07:47:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:41,243 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2023-11-19 07:47:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 07:47:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2023-11-19 07:47:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 07:47:41,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:41,245 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:41,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:47:41,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:41,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash -492391883, now seen corresponding path program 1 times [2023-11-19 07:47:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430974093] [2023-11-19 07:47:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:41,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:41,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:41,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33926840] [2023-11-19 07:47:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:41,477 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:41,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:47:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:41,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:41,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 07:47:41,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430974093] [2023-11-19 07:47:41,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33926840] [2023-11-19 07:47:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33926840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:41,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:41,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471793883] [2023-11-19 07:47:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:41,577 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 07:47:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:41,752 INFO L93 Difference]: Finished difference Result 388 states and 571 transitions. [2023-11-19 07:47:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2023-11-19 07:47:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:41,755 INFO L225 Difference]: With dead ends: 388 [2023-11-19 07:47:41,755 INFO L226 Difference]: Without dead ends: 236 [2023-11-19 07:47:41,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:41,757 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:41,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-19 07:47:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 221. [2023-11-19 07:47:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 127 states have internal predecessors, (155), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-19 07:47:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 324 transitions. [2023-11-19 07:47:41,899 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 324 transitions. Word has length 68 [2023-11-19 07:47:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:41,899 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 324 transitions. [2023-11-19 07:47:41,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 07:47:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 324 transitions. [2023-11-19 07:47:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 07:47:41,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:41,901 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:41,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:42,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:47:42,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:42,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1382204855, now seen corresponding path program 1 times [2023-11-19 07:47:42,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:42,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553449907] [2023-11-19 07:47:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:42,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:42,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235419099] [2023-11-19 07:47:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:42,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:42,135 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:42,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:47:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:42,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 07:47:42,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 07:47:42,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 07:47:43,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:43,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553449907] [2023-11-19 07:47:43,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:43,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235419099] [2023-11-19 07:47:43,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235419099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:43,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:43,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-11-19 07:47:43,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536573882] [2023-11-19 07:47:43,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:43,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:47:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:47:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:47:43,555 INFO L87 Difference]: Start difference. First operand 221 states and 324 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-19 07:47:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:48,990 INFO L93 Difference]: Finished difference Result 339 states and 495 transitions. [2023-11-19 07:47:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:47:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 68 [2023-11-19 07:47:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:48,994 INFO L225 Difference]: With dead ends: 339 [2023-11-19 07:47:48,994 INFO L226 Difference]: Without dead ends: 337 [2023-11-19 07:47:48,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=446, Invalid=1810, Unknown=0, NotChecked=0, Total=2256 [2023-11-19 07:47:48,997 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 508 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 07:47:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-19 07:47:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 314. [2023-11-19 07:47:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 181 states have (on average 1.2375690607734806) internal successors, (224), 182 states have internal predecessors, (224), 121 states have call successors, (121), 11 states have call predecessors, (121), 11 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-19 07:47:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 465 transitions. [2023-11-19 07:47:49,239 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 465 transitions. Word has length 68 [2023-11-19 07:47:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:49,239 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 465 transitions. [2023-11-19 07:47:49,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-19 07:47:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 465 transitions. [2023-11-19 07:47:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 07:47:49,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:49,241 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:49,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:49,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:49,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2023-11-19 07:47:49,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:49,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002798914] [2023-11-19 07:47:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:49,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:49,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331447235] [2023-11-19 07:47:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:49,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:49,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:49,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:49,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:47:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:49,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:47:49,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-19 07:47:49,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-19 07:47:49,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:49,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002798914] [2023-11-19 07:47:49,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:49,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331447235] [2023-11-19 07:47:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331447235] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:49,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:49,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 07:47:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953018630] [2023-11-19 07:47:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:49,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:49,718 INFO L87 Difference]: Start difference. First operand 314 states and 465 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:47:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:50,031 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2023-11-19 07:47:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:50,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2023-11-19 07:47:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:50,034 INFO L225 Difference]: With dead ends: 320 [2023-11-19 07:47:50,035 INFO L226 Difference]: Without dead ends: 318 [2023-11-19 07:47:50,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:47:50,036 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:50,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-19 07:47:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2023-11-19 07:47:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 184 states have (on average 1.233695652173913) internal successors, (227), 185 states have internal predecessors, (227), 121 states have call successors, (121), 12 states have call predecessors, (121), 12 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-19 07:47:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 468 transitions. [2023-11-19 07:47:50,265 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 468 transitions. Word has length 70 [2023-11-19 07:47:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:50,265 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 468 transitions. [2023-11-19 07:47:50,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:47:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 468 transitions. [2023-11-19 07:47:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 07:47:50,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:50,267 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:50,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:50,488 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:50,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 2 times [2023-11-19 07:47:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:50,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380448270] [2023-11-19 07:47:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:50,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:50,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:50,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938362626] [2023-11-19 07:47:50,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:50,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:50,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:50,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:50,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:47:50,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:47:50,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:50,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:47:50,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 07:47:50,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:50,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:50,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380448270] [2023-11-19 07:47:50,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:50,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938362626] [2023-11-19 07:47:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938362626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:50,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:50,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-19 07:47:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774847298] [2023-11-19 07:47:50,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:50,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:47:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:47:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:47:50,918 INFO L87 Difference]: Start difference. First operand 318 states and 468 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:47:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:51,455 INFO L93 Difference]: Finished difference Result 407 states and 598 transitions. [2023-11-19 07:47:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:47:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2023-11-19 07:47:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:51,460 INFO L225 Difference]: With dead ends: 407 [2023-11-19 07:47:51,460 INFO L226 Difference]: Without dead ends: 405 [2023-11-19 07:47:51,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:47:51,461 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 30 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:51,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 261 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-19 07:47:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 396. [2023-11-19 07:47:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 228 states have (on average 1.236842105263158) internal successors, (282), 229 states have internal predecessors, (282), 153 states have call successors, (153), 14 states have call predecessors, (153), 14 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-19 07:47:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 587 transitions. [2023-11-19 07:47:51,768 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 587 transitions. Word has length 68 [2023-11-19 07:47:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:51,768 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 587 transitions. [2023-11-19 07:47:51,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:47:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 587 transitions. [2023-11-19 07:47:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-19 07:47:51,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:51,770 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:51,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:51,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:47:51,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:51,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash 593432004, now seen corresponding path program 1 times [2023-11-19 07:47:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747976033] [2023-11-19 07:47:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:51,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:52,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688204042] [2023-11-19 07:47:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:52,008 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:52,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:47:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:52,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-19 07:47:52,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-19 07:47:53,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-19 07:47:54,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747976033] [2023-11-19 07:47:54,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:54,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688204042] [2023-11-19 07:47:54,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688204042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:54,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:54,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-11-19 07:47:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285796977] [2023-11-19 07:47:54,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:47:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:47:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:47:54,578 INFO L87 Difference]: Start difference. First operand 396 states and 587 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-19 07:48:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:02,682 INFO L93 Difference]: Finished difference Result 585 states and 879 transitions. [2023-11-19 07:48:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-19 07:48:02,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 82 [2023-11-19 07:48:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:02,687 INFO L225 Difference]: With dead ends: 585 [2023-11-19 07:48:02,687 INFO L226 Difference]: Without dead ends: 577 [2023-11-19 07:48:02,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=805, Invalid=4307, Unknown=0, NotChecked=0, Total=5112 [2023-11-19 07:48:02,690 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 200 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:02,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 785 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-19 07:48:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-19 07:48:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 429. [2023-11-19 07:48:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 249 states have (on average 1.2409638554216869) internal successors, (309), 250 states have internal predecessors, (309), 165 states have call successors, (165), 14 states have call predecessors, (165), 14 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-19 07:48:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 638 transitions. [2023-11-19 07:48:03,049 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 638 transitions. Word has length 82 [2023-11-19 07:48:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:03,049 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 638 transitions. [2023-11-19 07:48:03,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-19 07:48:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 638 transitions. [2023-11-19 07:48:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 07:48:03,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:03,051 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:03,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:03,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:03,251 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:03,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2023-11-19 07:48:03,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:03,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577784968] [2023-11-19 07:48:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:03,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:03,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:03,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571749142] [2023-11-19 07:48:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:03,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:03,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:03,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:03,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:48:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:03,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:48:03,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-11-19 07:48:03,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 07:48:04,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:04,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577784968] [2023-11-19 07:48:04,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:04,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571749142] [2023-11-19 07:48:04,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571749142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:04,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:04,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-19 07:48:04,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059751392] [2023-11-19 07:48:04,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:04,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:48:04,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:48:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:48:04,045 INFO L87 Difference]: Start difference. First operand 429 states and 638 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-19 07:48:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:06,805 INFO L93 Difference]: Finished difference Result 1054 states and 1697 transitions. [2023-11-19 07:48:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:48:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2023-11-19 07:48:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:06,816 INFO L225 Difference]: With dead ends: 1054 [2023-11-19 07:48:06,816 INFO L226 Difference]: Without dead ends: 1052 [2023-11-19 07:48:06,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=2073, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 07:48:06,819 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 160 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:06,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 436 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:48:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-11-19 07:48:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 883. [2023-11-19 07:48:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 436 states have (on average 1.3188073394495412) internal successors, (575), 437 states have internal predecessors, (575), 429 states have call successors, (429), 17 states have call predecessors, (429), 17 states have return successors, (428), 428 states have call predecessors, (428), 428 states have call successors, (428) [2023-11-19 07:48:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1432 transitions. [2023-11-19 07:48:07,762 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1432 transitions. Word has length 90 [2023-11-19 07:48:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:07,763 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1432 transitions. [2023-11-19 07:48:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-19 07:48:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1432 transitions. [2023-11-19 07:48:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-19 07:48:07,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:07,766 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:07,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:07,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:07,983 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:07,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1420613103, now seen corresponding path program 3 times [2023-11-19 07:48:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934009635] [2023-11-19 07:48:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,996 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118511489] [2023-11-19 07:48:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:48:07,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:07,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:08,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c84ceed0-f79a-4ea8-85b4-a068a44e68bb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:48:08,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:48:08,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:08,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-19 07:48:08,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-19 07:48:08,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-19 07:48:09,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934009635] [2023-11-19 07:48:09,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118511489] [2023-11-19 07:48:09,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118511489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:09,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:09,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2023-11-19 07:48:09,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644251337] [2023-11-19 07:48:09,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:09,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:48:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:48:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:48:09,785 INFO L87 Difference]: Start difference. First operand 883 states and 1432 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20)