./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx --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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:56:59,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:56:59,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:56:59,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:56:59,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:56:59,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:56:59,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:56:59,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:56:59,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:56:59,419 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:56:59,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:56:59,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:56:59,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:56:59,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:56:59,422 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:56:59,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:56:59,426 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:56:59,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:56:59,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:56:59,431 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:56:59,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:56:59,432 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:56:59,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:56:59,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:56:59,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:56:59,440 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:56:59,440 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:56:59,441 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:56:59,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:56:59,442 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:56:59,442 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:56:59,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:56:59,443 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:56:59,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:56:59,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:56:59,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:56:59,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:56:59,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:56:59,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:56:59,447 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:56:59,448 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:56:59,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:56:59,448 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_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2023-11-21 20:56:59,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:56:59,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:56:59,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:56:59,808 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:56:59,808 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:56:59,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-11-21 20:57:03,031 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:03,252 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:03,252 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-11-21 20:57:03,260 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/data/36772687e/678f04cf18dc4a2dba92550fbba05019/FLAGc7c34b772 [2023-11-21 20:57:03,275 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/data/36772687e/678f04cf18dc4a2dba92550fbba05019 [2023-11-21 20:57:03,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:03,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:03,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:03,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:03,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:03,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba34fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03, skipping insertion in model container [2023-11-21 20:57:03,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,317 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:03,485 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_37f0138c-56c6-4b99-91cb-b72c8bfb9671/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2023-11-21 20:57:03,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:03,519 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:57:03,530 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_37f0138c-56c6-4b99-91cb-b72c8bfb9671/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2023-11-21 20:57:03,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:03,557 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:57:03,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03 WrapperNode [2023-11-21 20:57:03,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:03,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:03,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:57:03,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:57:03,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,597 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-11-21 20:57:03,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:03,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:57:03,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:57:03,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:57:03,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,613 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,623 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 20:57:03,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:57:03,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:57:03,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:57:03,638 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:57:03,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (1/1) ... [2023-11-21 20:57:03,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:03,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:57:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:57:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:57:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 20:57:03,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 20:57:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:57:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:57:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:57:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 20:57:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 20:57:03,777 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:57:03,780 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:57:03,967 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:57:04,046 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:57:04,054 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 20:57:04,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:04 BoogieIcfgContainer [2023-11-21 20:57:04,056 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:57:04,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:57:04,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:57:04,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:57:04,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:57:03" (1/3) ... [2023-11-21 20:57:04,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f431303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:04, skipping insertion in model container [2023-11-21 20:57:04,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:03" (2/3) ... [2023-11-21 20:57:04,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f431303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:04, skipping insertion in model container [2023-11-21 20:57:04,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:04" (3/3) ... [2023-11-21 20:57:04,074 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2023-11-21 20:57:04,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:57:04,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 20:57:04,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:57:04,177 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;@1c141bf4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:57:04,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 20:57:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 20:57:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 20:57:04,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:04,193 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:04,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:04,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2023-11-21 20:57:04,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:04,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030377499] [2023-11-21 20:57:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:04,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:04,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564062786] [2023-11-21 20:57:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:04,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:04,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:57:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:04,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 20:57:04,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 20:57:04,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:04,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:04,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030377499] [2023-11-21 20:57:04,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:04,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564062786] [2023-11-21 20:57:04,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564062786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:04,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:04,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:57:04,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180115756] [2023-11-21 20:57:04,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:04,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 20:57:04,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 20:57:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 20:57:04,653 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:57:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:04,694 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2023-11-21 20:57:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 20:57:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2023-11-21 20:57:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:04,706 INFO L225 Difference]: With dead ends: 49 [2023-11-21 20:57:04,706 INFO L226 Difference]: Without dead ends: 28 [2023-11-21 20:57:04,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 20:57:04,713 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:04,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-21 20:57:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-21 20:57:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 20:57:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2023-11-21 20:57:04,773 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2023-11-21 20:57:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:04,776 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2023-11-21 20:57:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:57:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2023-11-21 20:57:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 20:57:04,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:04,778 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:04,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 20:57:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 20:57:04,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2023-11-21 20:57:04,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:04,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801944475] [2023-11-21 20:57:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:05,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:05,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700252226] [2023-11-21 20:57:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:05,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:05,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:05,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:57:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:05,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 20:57:05,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 20:57:05,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:05,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801944475] [2023-11-21 20:57:05,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:05,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700252226] [2023-11-21 20:57:05,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700252226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:05,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:05,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-21 20:57:05,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836226202] [2023-11-21 20:57:05,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:05,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 20:57:05,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 20:57:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-21 20:57:05,577 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 20:57:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:05,766 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2023-11-21 20:57:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:57:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2023-11-21 20:57:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:05,769 INFO L225 Difference]: With dead ends: 45 [2023-11-21 20:57:05,769 INFO L226 Difference]: Without dead ends: 43 [2023-11-21 20:57:05,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-21 20:57:05,771 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:05,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 107 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-21 20:57:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-11-21 20:57:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-21 20:57:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2023-11-21 20:57:05,789 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 27 [2023-11-21 20:57:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:05,790 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-11-21 20:57:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 20:57:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2023-11-21 20:57:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 20:57:05,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:05,792 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:05,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:06,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:06,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:06,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2023-11-21 20:57:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760581686] [2023-11-21 20:57:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:06,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:06,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810729644] [2023-11-21 20:57:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:06,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:06,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:06,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:06,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:57:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:06,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 20:57:06,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 20:57:06,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:06,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760581686] [2023-11-21 20:57:06,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810729644] [2023-11-21 20:57:06,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810729644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:06,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:06,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:06,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416054483] [2023-11-21 20:57:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:06,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:06,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:06,207 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:57:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:06,297 INFO L93 Difference]: Finished difference Result 60 states and 86 transitions. [2023-11-21 20:57:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:06,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2023-11-21 20:57:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:06,304 INFO L225 Difference]: With dead ends: 60 [2023-11-21 20:57:06,305 INFO L226 Difference]: Without dead ends: 58 [2023-11-21 20:57:06,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:57:06,310 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:06,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-21 20:57:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-11-21 20:57:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.2) internal successors, (30), 29 states have internal predecessors, (30), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-21 20:57:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2023-11-21 20:57:06,339 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 28 [2023-11-21 20:57:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:06,340 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2023-11-21 20:57:06,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 20:57:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2023-11-21 20:57:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 20:57:06,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:06,342 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:06,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:06,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:06,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:06,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1653487282, now seen corresponding path program 1 times [2023-11-21 20:57:06,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:06,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726706232] [2023-11-21 20:57:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:06,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074830321] [2023-11-21 20:57:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:06,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:06,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:06,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:57:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:06,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 20:57:06,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 20:57:06,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 20:57:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:06,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726706232] [2023-11-21 20:57:06,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074830321] [2023-11-21 20:57:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074830321] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:06,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:06,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-21 20:57:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189451649] [2023-11-21 20:57:06,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:06,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:57:06,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:57:06,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-21 20:57:06,992 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 20:57:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:07,100 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-11-21 20:57:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:57:07,101 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 32 [2023-11-21 20:57:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:07,102 INFO L225 Difference]: With dead ends: 57 [2023-11-21 20:57:07,103 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 20:57:07,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:57:07,105 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:07,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 117 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 20:57:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-21 20:57:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-21 20:57:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2023-11-21 20:57:07,126 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 32 [2023-11-21 20:57:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:07,126 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2023-11-21 20:57:07,126 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 20:57:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2023-11-21 20:57:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 20:57:07,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:07,129 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:07,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:07,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:07,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:07,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2023-11-21 20:57:07,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:07,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889610560] [2023-11-21 20:57:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:07,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:07,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:07,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406694712] [2023-11-21 20:57:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:07,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:07,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:07,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:07,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 20:57:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:07,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 20:57:07,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-21 20:57:07,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:07,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889610560] [2023-11-21 20:57:07,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406694712] [2023-11-21 20:57:07,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406694712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:07,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:07,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:07,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322216772] [2023-11-21 20:57:07,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:07,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:07,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:07,627 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 20:57:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:07,709 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-11-21 20:57:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2023-11-21 20:57:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:07,711 INFO L225 Difference]: With dead ends: 59 [2023-11-21 20:57:07,711 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 20:57:07,712 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 [2023-11-21 20:57:07,712 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:07,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 20:57:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-21 20:57:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-21 20:57:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-11-21 20:57:07,732 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 43 [2023-11-21 20:57:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:07,732 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-11-21 20:57:07,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 20:57:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-11-21 20:57:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 20:57:07,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:07,735 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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] [2023-11-21 20:57:07,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:07,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:07,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:07,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2137702023, now seen corresponding path program 1 times [2023-11-21 20:57:07,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:07,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743847464] [2023-11-21 20:57:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:07,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:07,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725560956] [2023-11-21 20:57:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:07,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:07,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:07,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:08,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 20:57:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:08,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 20:57:08,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-21 20:57:08,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-21 20:57:08,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:08,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743847464] [2023-11-21 20:57:08,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725560956] [2023-11-21 20:57:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725560956] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:08,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:08,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-21 20:57:08,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952021511] [2023-11-21 20:57:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:08,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:57:08,208 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 20:57:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:08,268 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-11-21 20:57:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:08,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 50 [2023-11-21 20:57:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:08,271 INFO L225 Difference]: With dead ends: 62 [2023-11-21 20:57:08,271 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 20:57:08,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:08,272 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:08,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 20:57:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2023-11-21 20:57:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-21 20:57:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2023-11-21 20:57:08,291 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2023-11-21 20:57:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:08,292 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2023-11-21 20:57:08,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 20:57:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2023-11-21 20:57:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 20:57:08,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:08,294 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:08,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:08,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:08,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:08,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2023-11-21 20:57:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:08,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98570932] [2023-11-21 20:57:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:08,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945017608] [2023-11-21 20:57:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:08,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:08,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:08,539 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:08,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 20:57:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:08,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:57:08,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-21 20:57:08,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-21 20:57:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98570932] [2023-11-21 20:57:08,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:08,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945017608] [2023-11-21 20:57:08,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945017608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:08,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-11-21 20:57:08,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040013744] [2023-11-21 20:57:08,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:08,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:57:08,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:57:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:57:08,813 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-21 20:57:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:09,030 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-11-21 20:57:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:57:09,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2023-11-21 20:57:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:09,035 INFO L225 Difference]: With dead ends: 99 [2023-11-21 20:57:09,035 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 20:57:09,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-21 20:57:09,037 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:09,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 203 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 20:57:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-11-21 20:57:09,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-21 20:57:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2023-11-21 20:57:09,099 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 52 [2023-11-21 20:57:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:09,101 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2023-11-21 20:57:09,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-21 20:57:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2023-11-21 20:57:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 20:57:09,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:09,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:09,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 20:57:09,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:09,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2023-11-21 20:57:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:09,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778498599] [2023-11-21 20:57:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:09,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:09,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:09,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768516810] [2023-11-21 20:57:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:09,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:09,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:09,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 20:57:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:09,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 20:57:09,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-21 20:57:09,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-21 20:57:10,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778498599] [2023-11-21 20:57:10,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768516810] [2023-11-21 20:57:10,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768516810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:10,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:10,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2023-11-21 20:57:10,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886614323] [2023-11-21 20:57:10,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:10,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 20:57:10,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 20:57:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-21 20:57:10,203 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 20:57:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:10,910 INFO L93 Difference]: Finished difference Result 117 states and 166 transitions. [2023-11-21 20:57:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 20:57:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 58 [2023-11-21 20:57:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:10,913 INFO L225 Difference]: With dead ends: 117 [2023-11-21 20:57:10,914 INFO L226 Difference]: Without dead ends: 114 [2023-11-21 20:57:10,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-11-21 20:57:10,915 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:10,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 263 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:57:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-21 20:57:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2023-11-21 20:57:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 60 states have internal predecessors, (71), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-21 20:57:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2023-11-21 20:57:10,968 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 58 [2023-11-21 20:57:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:10,968 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2023-11-21 20:57:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 20:57:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2023-11-21 20:57:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 20:57:10,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:10,970 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:10,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:11,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 20:57:11,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:11,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1216164650, now seen corresponding path program 2 times [2023-11-21 20:57:11,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:11,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454693983] [2023-11-21 20:57:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:11,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:11,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820242767] [2023-11-21 20:57:11,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:57:11,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:11,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:11,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 20:57:11,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:57:11,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:11,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-21 20:57:11,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-21 20:57:11,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 20:57:12,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:12,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454693983] [2023-11-21 20:57:12,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:12,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820242767] [2023-11-21 20:57:12,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820242767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:12,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:12,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2023-11-21 20:57:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231223368] [2023-11-21 20:57:12,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:12,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 20:57:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 20:57:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-21 20:57:12,116 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 20:57:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:13,948 INFO L93 Difference]: Finished difference Result 255 states and 392 transitions. [2023-11-21 20:57:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 20:57:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 63 [2023-11-21 20:57:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:13,956 INFO L225 Difference]: With dead ends: 255 [2023-11-21 20:57:13,956 INFO L226 Difference]: Without dead ends: 253 [2023-11-21 20:57:13,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-11-21 20:57:13,961 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 135 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:13,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 214 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 20:57:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-21 20:57:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 221. [2023-11-21 20:57:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 114 states have (on average 1.2719298245614035) internal successors, (145), 116 states have internal predecessors, (145), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-21 20:57:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 337 transitions. [2023-11-21 20:57:14,156 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 337 transitions. Word has length 63 [2023-11-21 20:57:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:14,157 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 337 transitions. [2023-11-21 20:57:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 20:57:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 337 transitions. [2023-11-21 20:57:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 20:57:14,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:14,161 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:14,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 20:57:14,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:14,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -491172873, now seen corresponding path program 3 times [2023-11-21 20:57:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:14,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579183152] [2023-11-21 20:57:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:14,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:14,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:14,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327358497] [2023-11-21 20:57:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 20:57:14,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:14,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 20:57:29,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 20:57:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:29,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-21 20:57:29,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-21 20:57:30,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579183152] [2023-11-21 20:57:30,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327358497] [2023-11-21 20:57:30,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327358497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:30,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:30,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-21 20:57:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927622515] [2023-11-21 20:57:30,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 20:57:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 20:57:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-21 20:57:30,256 INFO L87 Difference]: Start difference. First operand 221 states and 337 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-21 20:57:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:30,886 INFO L93 Difference]: Finished difference Result 233 states and 347 transitions. [2023-11-21 20:57:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 20:57:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 68 [2023-11-21 20:57:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:30,890 INFO L225 Difference]: With dead ends: 233 [2023-11-21 20:57:30,890 INFO L226 Difference]: Without dead ends: 231 [2023-11-21 20:57:30,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-21 20:57:30,892 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:30,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 139 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:57:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-21 20:57:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2023-11-21 20:57:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 120 states have (on average 1.2583333333333333) internal successors, (151), 122 states have internal predecessors, (151), 97 states have call successors, (97), 11 states have call predecessors, (97), 11 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-21 20:57:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 343 transitions. [2023-11-21 20:57:31,002 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 343 transitions. Word has length 68 [2023-11-21 20:57:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:31,003 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 343 transitions. [2023-11-21 20:57:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-21 20:57:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 343 transitions. [2023-11-21 20:57:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-21 20:57:31,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:31,004 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:31,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:31,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 20:57:31,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:31,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2023-11-21 20:57:31,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:31,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027669456] [2023-11-21 20:57:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:31,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:31,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986331929] [2023-11-21 20:57:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:31,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:31,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:31,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 20:57:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:31,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-21 20:57:31,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-21 20:57:31,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-21 20:57:32,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027669456] [2023-11-21 20:57:32,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986331929] [2023-11-21 20:57:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986331929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:32,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:32,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-11-21 20:57:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614354765] [2023-11-21 20:57:32,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 20:57:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 20:57:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-21 20:57:32,623 INFO L87 Difference]: Start difference. First operand 229 states and 343 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 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) [2023-11-21 20:57:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:35,815 INFO L93 Difference]: Finished difference Result 346 states and 529 transitions. [2023-11-21 20:57:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 20:57:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 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 74 [2023-11-21 20:57:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:35,819 INFO L225 Difference]: With dead ends: 346 [2023-11-21 20:57:35,820 INFO L226 Difference]: Without dead ends: 342 [2023-11-21 20:57:35,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 20:57:35,822 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 94 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:35,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 408 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 20:57:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-21 20:57:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2023-11-21 20:57:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 173 states have (on average 1.2716763005780347) internal successors, (220), 176 states have internal predecessors, (220), 150 states have call successors, (150), 14 states have call predecessors, (150), 14 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-21 20:57:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 518 transitions. [2023-11-21 20:57:36,061 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 518 transitions. Word has length 74 [2023-11-21 20:57:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:36,061 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 518 transitions. [2023-11-21 20:57:36,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 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) [2023-11-21 20:57:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 518 transitions. [2023-11-21 20:57:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-21 20:57:36,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:36,063 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 3, 3, 3, 3, 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] [2023-11-21 20:57:36,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-21 20:57:36,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 20:57:36,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:36,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2021661415, now seen corresponding path program 4 times [2023-11-21 20:57:36,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:36,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104061669] [2023-11-21 20:57:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:36,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:36,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132505612] [2023-11-21 20:57:36,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 20:57:36,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:36,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:36,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:36,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 20:57:36,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 20:57:36,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:36,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 20:57:36,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-21 20:57:36,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:36,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:36,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104061669] [2023-11-21 20:57:36,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:36,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132505612] [2023-11-21 20:57:36,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132505612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:36,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:36,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339790913] [2023-11-21 20:57:36,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:36,415 INFO L87 Difference]: Start difference. First operand 338 states and 518 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-21 20:57:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:36,646 INFO L93 Difference]: Finished difference Result 407 states and 616 transitions. [2023-11-21 20:57:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:57:36,647 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 83 [2023-11-21 20:57:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:36,653 INFO L225 Difference]: With dead ends: 407 [2023-11-21 20:57:36,654 INFO L226 Difference]: Without dead ends: 236 [2023-11-21 20:57:36,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:57:36,661 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-21 20:57:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2023-11-21 20:57:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 78 states have call successors, (78), 13 states have call predecessors, (78), 13 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-21 20:57:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2023-11-21 20:57:36,786 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 83 [2023-11-21 20:57:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:36,786 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2023-11-21 20:57:36,786 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-21 20:57:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2023-11-21 20:57:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-21 20:57:36,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:36,789 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:36,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:37,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:37,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2023-11-21 20:57:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:37,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294545699] [2023-11-21 20:57:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:37,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:37,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079270396] [2023-11-21 20:57:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:37,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:37,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:37,038 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:37,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 20:57:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-21 20:57:37,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2023-11-21 20:57:38,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:38,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:38,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294545699] [2023-11-21 20:57:38,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:38,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079270396] [2023-11-21 20:57:38,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079270396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:38,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:38,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-21 20:57:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358981762] [2023-11-21 20:57:38,836 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:38,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 20:57:38,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 20:57:38,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-21 20:57:38,837 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-21 20:57:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:39,869 INFO L93 Difference]: Finished difference Result 220 states and 311 transitions. [2023-11-21 20:57:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 20:57:39,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 90 [2023-11-21 20:57:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:39,872 INFO L225 Difference]: With dead ends: 220 [2023-11-21 20:57:39,872 INFO L226 Difference]: Without dead ends: 218 [2023-11-21 20:57:39,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-21 20:57:39,873 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:39,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 293 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 20:57:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-21 20:57:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2023-11-21 20:57:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 113 states have internal predecessors, (129), 90 states have call successors, (90), 15 states have call predecessors, (90), 15 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-21 20:57:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 307 transitions. [2023-11-21 20:57:39,997 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 307 transitions. Word has length 90 [2023-11-21 20:57:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:39,997 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 307 transitions. [2023-11-21 20:57:39,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-21 20:57:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 307 transitions. [2023-11-21 20:57:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-21 20:57:39,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:40,000 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:40,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:40,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 20:57:40,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:40,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2012729071, now seen corresponding path program 1 times [2023-11-21 20:57:40,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:40,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678345381] [2023-11-21 20:57:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:40,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:40,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:40,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428990532] [2023-11-21 20:57:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:40,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:40,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:40,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 20:57:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:40,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 20:57:40,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-11-21 20:57:40,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-21 20:57:40,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678345381] [2023-11-21 20:57:40,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428990532] [2023-11-21 20:57:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428990532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:40,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:40,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-11-21 20:57:40,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785873678] [2023-11-21 20:57:40,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:40,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:57:40,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:57:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:57:40,501 INFO L87 Difference]: Start difference. First operand 216 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-21 20:57:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:40,849 INFO L93 Difference]: Finished difference Result 242 states and 346 transitions. [2023-11-21 20:57:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 20:57:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 104 [2023-11-21 20:57:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:40,854 INFO L225 Difference]: With dead ends: 242 [2023-11-21 20:57:40,854 INFO L226 Difference]: Without dead ends: 230 [2023-11-21 20:57:40,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-21 20:57:40,856 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:40,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 294 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-21 20:57:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 211. [2023-11-21 20:57:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 states have internal predecessors, (125), 89 states have call successors, (89), 14 states have call predecessors, (89), 14 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-21 20:57:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 301 transitions. [2023-11-21 20:57:40,998 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 301 transitions. Word has length 104 [2023-11-21 20:57:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:40,999 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 301 transitions. [2023-11-21 20:57:40,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-21 20:57:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 301 transitions. [2023-11-21 20:57:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-21 20:57:41,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:41,001 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:41,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:41,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:41,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:41,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash 173280102, now seen corresponding path program 2 times [2023-11-21 20:57:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:41,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042776855] [2023-11-21 20:57:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:41,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:41,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107014446] [2023-11-21 20:57:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:57:41,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:41,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:41,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 20:57:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:57:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:41,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-21 20:57:41,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2023-11-21 20:57:42,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:42,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042776855] [2023-11-21 20:57:42,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107014446] [2023-11-21 20:57:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107014446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:42,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-21 20:57:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635724355] [2023-11-21 20:57:42,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:42,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 20:57:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 20:57:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-11-21 20:57:42,378 INFO L87 Difference]: Start difference. First operand 211 states and 301 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-21 20:57:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:43,208 INFO L93 Difference]: Finished difference Result 241 states and 344 transitions. [2023-11-21 20:57:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 20:57:43,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 105 [2023-11-21 20:57:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:43,211 INFO L225 Difference]: With dead ends: 241 [2023-11-21 20:57:43,211 INFO L226 Difference]: Without dead ends: 239 [2023-11-21 20:57:43,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2023-11-21 20:57:43,213 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 32 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:43,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 354 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 20:57:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-21 20:57:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2023-11-21 20:57:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 121 states have internal predecessors, (139), 101 states have call successors, (101), 15 states have call predecessors, (101), 15 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-21 20:57:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 339 transitions. [2023-11-21 20:57:43,367 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 339 transitions. Word has length 105 [2023-11-21 20:57:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:43,368 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 339 transitions. [2023-11-21 20:57:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-21 20:57:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 339 transitions. [2023-11-21 20:57:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 20:57:43,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:43,371 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:43,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:43,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 20:57:43,573 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:43,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash -743497349, now seen corresponding path program 3 times [2023-11-21 20:57:43,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:43,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650929389] [2023-11-21 20:57:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:43,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:43,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802972667] [2023-11-21 20:57:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 20:57:43,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:43,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:43,588 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:43,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-21 20:57:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 20:57:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:44,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-21 20:57:44,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 57 proven. 47 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-21 20:57:45,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 63 proven. 41 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-21 20:57:46,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650929389] [2023-11-21 20:57:46,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802972667] [2023-11-21 20:57:46,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802972667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:46,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:46,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-11-21 20:57:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096113678] [2023-11-21 20:57:46,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:46,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 20:57:46,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 20:57:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-21 20:57:46,923 INFO L87 Difference]: Start difference. First operand 236 states and 339 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 23 states have internal predecessors, (48), 13 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2023-11-21 20:57:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:51,273 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2023-11-21 20:57:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-21 20:57:51,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 23 states have internal predecessors, (48), 13 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 110 [2023-11-21 20:57:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:51,276 INFO L225 Difference]: With dead ends: 269 [2023-11-21 20:57:51,277 INFO L226 Difference]: Without dead ends: 267 [2023-11-21 20:57:51,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=460, Invalid=2090, Unknown=0, NotChecked=0, Total=2550 [2023-11-21 20:57:51,279 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 96 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:51,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 562 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-21 20:57:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-21 20:57:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 263. [2023-11-21 20:57:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 141 states have internal predecessors, (159), 104 states have call successors, (104), 20 states have call predecessors, (104), 20 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-21 20:57:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 365 transitions. [2023-11-21 20:57:51,556 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 365 transitions. Word has length 110 [2023-11-21 20:57:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:51,557 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 365 transitions. [2023-11-21 20:57:51,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 23 states have internal predecessors, (48), 13 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2023-11-21 20:57:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 365 transitions. [2023-11-21 20:57:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-21 20:57:51,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:51,561 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:51,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-21 20:57:51,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 20:57:51,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:51,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1680324149, now seen corresponding path program 4 times [2023-11-21 20:57:51,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:51,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745898724] [2023-11-21 20:57:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:51,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:51,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489784524] [2023-11-21 20:57:51,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 20:57:51,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:51,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:51,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:51,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-21 20:57:51,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 20:57:51,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:51,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-21 20:57:51,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 71 proven. 41 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-11-21 20:57:53,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:53,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745898724] [2023-11-21 20:57:53,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489784524] [2023-11-21 20:57:53,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489784524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:53,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:53,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-21 20:57:53,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742968440] [2023-11-21 20:57:53,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:53,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 20:57:53,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 20:57:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-21 20:57:53,958 INFO L87 Difference]: Start difference. First operand 263 states and 365 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-21 20:57:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:55,308 INFO L93 Difference]: Finished difference Result 275 states and 375 transitions. [2023-11-21 20:57:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 20:57:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 112 [2023-11-21 20:57:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:55,311 INFO L225 Difference]: With dead ends: 275 [2023-11-21 20:57:55,311 INFO L226 Difference]: Without dead ends: 273 [2023-11-21 20:57:55,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-11-21 20:57:55,313 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 44 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:55,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 243 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 20:57:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-21 20:57:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 238. [2023-11-21 20:57:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 129 states have internal predecessors, (145), 92 states have call successors, (92), 19 states have call predecessors, (92), 19 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-21 20:57:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 327 transitions. [2023-11-21 20:57:55,467 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 327 transitions. Word has length 112 [2023-11-21 20:57:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:55,467 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 327 transitions. [2023-11-21 20:57:55,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-21 20:57:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 327 transitions. [2023-11-21 20:57:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-21 20:57:55,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:55,470 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:55,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:55,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 20:57:55,691 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1506060358, now seen corresponding path program 5 times [2023-11-21 20:57:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:55,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713494271] [2023-11-21 20:57:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:55,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:57:55,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196659615] [2023-11-21 20:57:55,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 20:57:55,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:55,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:55,707 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:55,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-21 20:57:55,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-21 20:57:55,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:55,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-21 20:57:55,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 79 proven. 77 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-21 20:57:58,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713494271] [2023-11-21 20:57:58,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:57:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196659615] [2023-11-21 20:57:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196659615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:58,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-21 20:57:58,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022773046] [2023-11-21 20:57:58,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:58,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 20:57:58,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:58,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 20:57:58,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-21 20:57:58,579 INFO L87 Difference]: Start difference. First operand 238 states and 327 transitions. Second operand has 19 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 10 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-21 20:57:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:59,827 INFO L93 Difference]: Finished difference Result 255 states and 341 transitions. [2023-11-21 20:57:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 20:57:59,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 10 states have call predecessors, (21), 7 states have call successors, (21) Word has length 115 [2023-11-21 20:57:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:59,830 INFO L225 Difference]: With dead ends: 255 [2023-11-21 20:57:59,830 INFO L226 Difference]: Without dead ends: 253 [2023-11-21 20:57:59,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-11-21 20:57:59,832 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:59,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 338 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 20:57:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-21 20:57:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2023-11-21 20:57:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 138 states have internal predecessors, (154), 92 states have call successors, (92), 22 states have call predecessors, (92), 22 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-21 20:57:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 336 transitions. [2023-11-21 20:57:59,982 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 336 transitions. Word has length 115 [2023-11-21 20:57:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:59,982 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 336 transitions. [2023-11-21 20:57:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 10 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-21 20:57:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 336 transitions. [2023-11-21 20:57:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 20:57:59,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:59,985 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:59,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:00,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 20:58:00,191 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:00,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1538893617, now seen corresponding path program 2 times [2023-11-21 20:58:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:00,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026466497] [2023-11-21 20:58:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:00,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:58:00,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718367225] [2023-11-21 20:58:00,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:58:00,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:00,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:00,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:00,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f0138c-56c6-4b99-91cb-b72c8bfb9671/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-21 20:58:00,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:58:00,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:00,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-21 20:58:00,300 INFO L285 TraceCheckSpWp]: Computing forward predicates...