./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme --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 cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:44:54,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:44:54,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:44:54,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:44:54,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:44:54,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:44:54,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:44:54,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:44:54,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:44:54,453 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:44:54,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:44:54,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:44:54,455 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:44:54,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:44:54,457 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:44:54,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:44:54,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:44:54,458 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:44:54,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:44:54,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:44:54,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:44:54,460 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:44:54,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:44:54,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:44:54,461 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:44:54,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:44:54,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:44:54,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:44:54,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:44:54,464 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:44:54,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:44:54,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:54,465 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:44:54,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:44:54,466 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:44:54,466 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:44:54,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:44:54,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:44:54,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:44:54,467 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:44:54,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:44:54,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:44:54,468 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_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed [2023-11-26 11:44:54,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:44:54,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:44:54,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:44:54,761 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:44:54,762 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:44:54,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2023-11-26 11:44:58,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:44:58,292 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:44:58,292 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2023-11-26 11:44:58,301 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/data/7df94c744/48ce7d15be0347a29e3808d29f513d9e/FLAG9483a8ee8 [2023-11-26 11:44:58,317 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/data/7df94c744/48ce7d15be0347a29e3808d29f513d9e [2023-11-26 11:44:58,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:44:58,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:44:58,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:58,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:44:58,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:44:58,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1a1cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58, skipping insertion in model container [2023-11-26 11:44:58,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,363 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:44:58,515 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_4d224b74-6ea4-4f61-8414-079b05daf6f3/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2023-11-26 11:44:58,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:58,549 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:44:58,562 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_4d224b74-6ea4-4f61-8414-079b05daf6f3/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2023-11-26 11:44:58,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:58,591 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:44:58,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58 WrapperNode [2023-11-26 11:44:58,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:58,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:58,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:44:58,601 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:44:58,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,614 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,637 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-11-26 11:44:58,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:58,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:44:58,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:44:58,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:44:58,649 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,651 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,664 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:44:58,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,673 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,676 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:44:58,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:44:58,677 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:44:58,677 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:44:58,678 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:58,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:44:58,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:44:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:44:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:44:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:44:58,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:44:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:44:58,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:44:58,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:44:58,841 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:44:59,078 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:44:59,116 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:44:59,116 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:44:59,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:59 BoogieIcfgContainer [2023-11-26 11:44:59,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:44:59,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:44:59,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:44:59,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:44:59,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:44:58" (1/3) ... [2023-11-26 11:44:59,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400e0217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:59, skipping insertion in model container [2023-11-26 11:44:59,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (2/3) ... [2023-11-26 11:44:59,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400e0217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:59, skipping insertion in model container [2023-11-26 11:44:59,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:59" (3/3) ... [2023-11-26 11:44:59,132 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound50.c [2023-11-26 11:44:59,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:44:59,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:44:59,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:44:59,204 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;@4d36e278, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:44:59,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:44:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:44:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:44:59,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:59,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:44:59,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:59,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:59,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1379524608, now seen corresponding path program 1 times [2023-11-26 11:44:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753856295] [2023-11-26 11:44:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:59,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753856295] [2023-11-26 11:44:59,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753856295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:59,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:59,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329104260] [2023-11-26 11:44:59,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:59,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:44:59,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:44:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:44:59,529 INFO L87 Difference]: Start difference. First operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:59,604 INFO L93 Difference]: Finished difference Result 45 states and 82 transitions. [2023-11-26 11:44:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:44:59,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-26 11:44:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:59,616 INFO L225 Difference]: With dead ends: 45 [2023-11-26 11:44:59,616 INFO L226 Difference]: Without dead ends: 21 [2023-11-26 11:44:59,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:44:59,624 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:59,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-26 11:44:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-26 11:44:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 11:44:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2023-11-26 11:44:59,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 6 [2023-11-26 11:44:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:59,685 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2023-11-26 11:44:59,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2023-11-26 11:44:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:44:59,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:59,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:44:59,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:59,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash -345068235, now seen corresponding path program 1 times [2023-11-26 11:44:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:59,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650092843] [2023-11-26 11:44:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:59,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:59,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:59,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650092843] [2023-11-26 11:44:59,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650092843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:59,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:59,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:59,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045863004] [2023-11-26 11:44:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:59,903 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:59,951 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2023-11-26 11:44:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:59,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 11:44:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:59,957 INFO L225 Difference]: With dead ends: 35 [2023-11-26 11:44:59,957 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 11:44:59,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:59,960 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:59,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 11:44:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-26 11:44:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 11:44:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2023-11-26 11:44:59,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 7 [2023-11-26 11:44:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:59,983 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2023-11-26 11:44:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2023-11-26 11:44:59,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:44:59,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:59,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:44:59,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:44:59,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash -343519103, now seen corresponding path program 1 times [2023-11-26 11:44:59,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:59,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034019211] [2023-11-26 11:44:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:00,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:00,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034019211] [2023-11-26 11:45:00,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034019211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:00,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:00,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542785997] [2023-11-26 11:45:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:00,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:00,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:00,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:00,237 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:00,364 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-26 11:45:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 11:45:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:00,367 INFO L225 Difference]: With dead ends: 29 [2023-11-26 11:45:00,367 INFO L226 Difference]: Without dead ends: 27 [2023-11-26 11:45:00,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:45:00,377 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:00,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:45:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-26 11:45:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-26 11:45:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 11:45:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-26 11:45:00,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2023-11-26 11:45:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:00,406 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-26 11:45:00,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-26 11:45:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:45:00,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:00,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:00,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:45:00,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:00,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:00,410 INFO L85 PathProgramCache]: Analyzing trace with hash -875596316, now seen corresponding path program 1 times [2023-11-26 11:45:00,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:00,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572567813] [2023-11-26 11:45:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:00,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:00,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730778383] [2023-11-26 11:45:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:00,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:00,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:00,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:45:00,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:00,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:00,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572567813] [2023-11-26 11:45:00,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730778383] [2023-11-26 11:45:00,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730778383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:00,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:00,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-26 11:45:00,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925731684] [2023-11-26 11:45:00,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:00,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:45:00,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:45:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:45:00,891 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:45:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:01,304 INFO L93 Difference]: Finished difference Result 53 states and 75 transitions. [2023-11-26 11:45:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2023-11-26 11:45:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:01,309 INFO L225 Difference]: With dead ends: 53 [2023-11-26 11:45:01,309 INFO L226 Difference]: Without dead ends: 51 [2023-11-26 11:45:01,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:01,311 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:01,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:45:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-26 11:45:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2023-11-26 11:45:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 11:45:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2023-11-26 11:45:01,353 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 12 [2023-11-26 11:45:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:01,354 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2023-11-26 11:45:01,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:45:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2023-11-26 11:45:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:45:01,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:01,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:01,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:45:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:01,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:01,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2105691681, now seen corresponding path program 1 times [2023-11-26 11:45:01,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:01,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884783879] [2023-11-26 11:45:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:01,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:01,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:01,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039104937] [2023-11-26 11:45:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:01,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:01,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:01,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:45:01,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:01,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884783879] [2023-11-26 11:45:01,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039104937] [2023-11-26 11:45:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039104937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:01,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:01,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-26 11:45:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126316717] [2023-11-26 11:45:01,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:01,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:45:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:45:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:45:01,926 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:45:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:02,349 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2023-11-26 11:45:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:45:02,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-11-26 11:45:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:02,351 INFO L225 Difference]: With dead ends: 59 [2023-11-26 11:45:02,352 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 11:45:02,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:02,353 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:02,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 95 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:45:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 11:45:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2023-11-26 11:45:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 11:45:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2023-11-26 11:45:02,377 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 17 [2023-11-26 11:45:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:02,378 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2023-11-26 11:45:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:45:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2023-11-26 11:45:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 11:45:02,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:02,387 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:02,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:02,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:02,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:02,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 168504260, now seen corresponding path program 1 times [2023-11-26 11:45:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:02,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942739440] [2023-11-26 11:45:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:02,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:02,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:02,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943118290] [2023-11-26 11:45:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:02,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:02,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:02,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:45:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:02,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:45:02,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:45:02,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:45:03,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:03,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942739440] [2023-11-26 11:45:03,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:03,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943118290] [2023-11-26 11:45:03,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943118290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:03,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:03,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-26 11:45:03,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393334252] [2023-11-26 11:45:03,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:03,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:45:03,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:45:03,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:45:03,678 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:45:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:04,633 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-11-26 11:45:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:45:04,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 22 [2023-11-26 11:45:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:04,635 INFO L225 Difference]: With dead ends: 73 [2023-11-26 11:45:04,635 INFO L226 Difference]: Without dead ends: 64 [2023-11-26 11:45:04,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:04,637 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:04,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:45:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-26 11:45:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-26 11:45:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-26 11:45:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2023-11-26 11:45:04,662 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 22 [2023-11-26 11:45:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:04,663 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2023-11-26 11:45:04,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:45:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2023-11-26 11:45:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 11:45:04,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:04,665 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:04,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:04,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:04,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:04,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1666200982, now seen corresponding path program 1 times [2023-11-26 11:45:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010165364] [2023-11-26 11:45:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:04,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:04,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079699518] [2023-11-26 11:45:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:04,890 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:04,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:45:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:45:04,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-26 11:45:05,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-26 11:45:05,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:05,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010165364] [2023-11-26 11:45:05,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:05,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079699518] [2023-11-26 11:45:05,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079699518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:05,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:05,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-26 11:45:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095770817] [2023-11-26 11:45:05,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:45:05,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:45:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:45:05,080 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-26 11:45:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:05,261 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2023-11-26 11:45:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:45:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 40 [2023-11-26 11:45:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:05,264 INFO L225 Difference]: With dead ends: 139 [2023-11-26 11:45:05,264 INFO L226 Difference]: Without dead ends: 118 [2023-11-26 11:45:05,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:45:05,266 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:05,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:45:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-26 11:45:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2023-11-26 11:45:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 62 states have internal predecessors, (65), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-26 11:45:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2023-11-26 11:45:05,308 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 40 [2023-11-26 11:45:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:05,308 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2023-11-26 11:45:05,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-26 11:45:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2023-11-26 11:45:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-26 11:45:05,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:05,311 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:05,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:05,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:05,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:05,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1054982331, now seen corresponding path program 1 times [2023-11-26 11:45:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:05,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561093529] [2023-11-26 11:45:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:05,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737677867] [2023-11-26 11:45:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:05,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:05,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:05,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:45:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:05,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:45:05,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-26 11:45:05,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-26 11:45:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561093529] [2023-11-26 11:45:05,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737677867] [2023-11-26 11:45:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737677867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:05,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:05,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-26 11:45:05,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120873802] [2023-11-26 11:45:05,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:45:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:45:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:05,992 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-26 11:45:10,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:45:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:10,734 INFO L93 Difference]: Finished difference Result 128 states and 156 transitions. [2023-11-26 11:45:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:45:10,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 45 [2023-11-26 11:45:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:10,738 INFO L225 Difference]: With dead ends: 128 [2023-11-26 11:45:10,738 INFO L226 Difference]: Without dead ends: 126 [2023-11-26 11:45:10,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:45:10,739 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:10,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 157 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-11-26 11:45:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-26 11:45:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-26 11:45:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-26 11:45:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2023-11-26 11:45:10,784 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 45 [2023-11-26 11:45:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:10,784 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2023-11-26 11:45:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-26 11:45:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2023-11-26 11:45:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:45:10,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:10,786 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:45:10,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:10,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:10,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2020348453, now seen corresponding path program 2 times [2023-11-26 11:45:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:10,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768856717] [2023-11-26 11:45:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:11,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273087351] [2023-11-26 11:45:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:45:11,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:11,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:11,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:11,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:45:11,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:45:11,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:11,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:45:11,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-26 11:45:11,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-26 11:45:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:11,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768856717] [2023-11-26 11:45:11,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:11,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273087351] [2023-11-26 11:45:11,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273087351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:11,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:11,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-26 11:45:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108913402] [2023-11-26 11:45:11,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:11,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:45:11,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:45:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:45:11,514 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-26 11:45:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:11,768 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2023-11-26 11:45:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 55 [2023-11-26 11:45:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:11,771 INFO L225 Difference]: With dead ends: 140 [2023-11-26 11:45:11,772 INFO L226 Difference]: Without dead ends: 134 [2023-11-26 11:45:11,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:11,773 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:11,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 99 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:45:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-26 11:45:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-11-26 11:45:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-26 11:45:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2023-11-26 11:45:11,837 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 55 [2023-11-26 11:45:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:11,839 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2023-11-26 11:45:11,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-26 11:45:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2023-11-26 11:45:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 11:45:11,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:11,846 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:11,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:45:12,047 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:12,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1733391679, now seen corresponding path program 1 times [2023-11-26 11:45:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:12,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007417858] [2023-11-26 11:45:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:12,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:12,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650619548] [2023-11-26 11:45:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:12,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:12,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:12,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:12,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:45:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:12,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 11:45:12,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-26 11:45:12,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-26 11:45:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007417858] [2023-11-26 11:45:13,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650619548] [2023-11-26 11:45:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650619548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:13,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-26 11:45:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208502549] [2023-11-26 11:45:13,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:13,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:45:13,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:13,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:45:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:13,051 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-26 11:45:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:13,929 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2023-11-26 11:45:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:45:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 66 [2023-11-26 11:45:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:13,931 INFO L225 Difference]: With dead ends: 148 [2023-11-26 11:45:13,931 INFO L226 Difference]: Without dead ends: 144 [2023-11-26 11:45:13,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:45:13,933 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:13,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 150 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:45:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-26 11:45:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-26 11:45:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 87 states have internal predecessors, (90), 37 states have call successors, (37), 23 states have call predecessors, (37), 22 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-26 11:45:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2023-11-26 11:45:14,039 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 66 [2023-11-26 11:45:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:14,042 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2023-11-26 11:45:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-26 11:45:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2023-11-26 11:45:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 11:45:14,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:14,047 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:14,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:45:14,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:45:14,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:14,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2124427812, now seen corresponding path program 1 times [2023-11-26 11:45:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584910739] [2023-11-26 11:45:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:14,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444631534] [2023-11-26 11:45:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:14,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:14,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:14,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:14,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:45:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:14,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 11:45:14,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-26 11:45:14,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-26 11:45:15,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584910739] [2023-11-26 11:45:15,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444631534] [2023-11-26 11:45:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444631534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:15,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:15,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-26 11:45:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381177081] [2023-11-26 11:45:15,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:45:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:45:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:45:15,160 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-26 11:45:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:15,981 INFO L93 Difference]: Finished difference Result 163 states and 187 transitions. [2023-11-26 11:45:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:45:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 71 [2023-11-26 11:45:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:15,990 INFO L225 Difference]: With dead ends: 163 [2023-11-26 11:45:15,990 INFO L226 Difference]: Without dead ends: 152 [2023-11-26 11:45:15,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:45:15,992 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:15,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 130 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:45:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-26 11:45:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-26 11:45:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 86 states have (on average 1.069767441860465) internal successors, (92), 90 states have internal predecessors, (92), 42 states have call successors, (42), 23 states have call predecessors, (42), 23 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-26 11:45:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 173 transitions. [2023-11-26 11:45:16,090 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 173 transitions. Word has length 71 [2023-11-26 11:45:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:16,091 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 173 transitions. [2023-11-26 11:45:16,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-26 11:45:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 173 transitions. [2023-11-26 11:45:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-26 11:45:16,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:16,093 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2023-11-26 11:45:16,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:45:16,299 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:16,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -331345392, now seen corresponding path program 3 times [2023-11-26 11:45:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86825930] [2023-11-26 11:45:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:16,325 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698548712] [2023-11-26 11:45:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:45:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:16,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:16,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:45:16,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:45:16,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:16,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 11:45:16,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-26 11:45:16,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-26 11:45:19,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86825930] [2023-11-26 11:45:19,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698548712] [2023-11-26 11:45:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698548712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:19,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:19,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-26 11:45:19,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484451930] [2023-11-26 11:45:19,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:19,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:45:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:45:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:45:19,157 INFO L87 Difference]: Start difference. First operand 152 states and 173 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-26 11:45:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:21,222 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2023-11-26 11:45:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:45:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 78 [2023-11-26 11:45:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:21,224 INFO L225 Difference]: With dead ends: 158 [2023-11-26 11:45:21,225 INFO L226 Difference]: Without dead ends: 142 [2023-11-26 11:45:21,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:45:21,226 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:21,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 216 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 11:45:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-26 11:45:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-26 11:45:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 86 states have internal predecessors, (87), 34 states have call successors, (34), 22 states have call predecessors, (34), 22 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-26 11:45:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2023-11-26 11:45:21,283 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 78 [2023-11-26 11:45:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:21,284 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2023-11-26 11:45:21,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-26 11:45:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2023-11-26 11:45:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:45:21,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:21,286 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:21,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:21,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:45:21,493 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:21,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:21,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1753860344, now seen corresponding path program 2 times [2023-11-26 11:45:21,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:21,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391738328] [2023-11-26 11:45:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:21,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:21,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505225060] [2023-11-26 11:45:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:45:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:21,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:45:21,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:45:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:21,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:45:21,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-26 11:45:21,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:45:22,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391738328] [2023-11-26 11:45:22,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505225060] [2023-11-26 11:45:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505225060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:22,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-26 11:45:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652236397] [2023-11-26 11:45:22,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:45:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:45:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:22,012 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-11-26 11:45:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:22,552 INFO L93 Difference]: Finished difference Result 397 states and 421 transitions. [2023-11-26 11:45:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:45:22,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 124 [2023-11-26 11:45:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:22,556 INFO L225 Difference]: With dead ends: 397 [2023-11-26 11:45:22,557 INFO L226 Difference]: Without dead ends: 381 [2023-11-26 11:45:22,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:45:22,559 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 131 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:22,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 132 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:45:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-26 11:45:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 325. [2023-11-26 11:45:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 201 states have (on average 1.0497512437810945) internal successors, (211), 208 states have internal predecessors, (211), 68 states have call successors, (68), 56 states have call predecessors, (68), 55 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:45:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 344 transitions. [2023-11-26 11:45:22,716 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 344 transitions. Word has length 124 [2023-11-26 11:45:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:22,717 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 344 transitions. [2023-11-26 11:45:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-11-26 11:45:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 344 transitions. [2023-11-26 11:45:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-26 11:45:22,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:22,719 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:22,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:22,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:45:22,925 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash 109149613, now seen corresponding path program 1 times [2023-11-26 11:45:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:22,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881682518] [2023-11-26 11:45:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:22,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:22,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999308223] [2023-11-26 11:45:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:22,939 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:22,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:45:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:23,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-26 11:45:23,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-11-26 11:45:23,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:23,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881682518] [2023-11-26 11:45:23,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999308223] [2023-11-26 11:45:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999308223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:23,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:45:23,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-26 11:45:23,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830345680] [2023-11-26 11:45:23,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:23,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:45:23,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:45:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:23,644 INFO L87 Difference]: Start difference. First operand 325 states and 344 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-26 11:45:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:24,123 INFO L93 Difference]: Finished difference Result 327 states and 345 transitions. [2023-11-26 11:45:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:45:24,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 5 states have call successors, (23) Word has length 132 [2023-11-26 11:45:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:24,127 INFO L225 Difference]: With dead ends: 327 [2023-11-26 11:45:24,127 INFO L226 Difference]: Without dead ends: 311 [2023-11-26 11:45:24,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:45:24,134 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:24,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 274 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:45:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-26 11:45:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2023-11-26 11:45:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 193 states have (on average 1.0466321243523315) internal successors, (202), 200 states have internal predecessors, (202), 64 states have call successors, (64), 53 states have call predecessors, (64), 53 states have return successors, (62), 57 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 11:45:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 328 transitions. [2023-11-26 11:45:24,259 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 328 transitions. Word has length 132 [2023-11-26 11:45:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:24,259 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 328 transitions. [2023-11-26 11:45:24,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-26 11:45:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 328 transitions. [2023-11-26 11:45:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-26 11:45:24,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:24,262 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:24,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:45:24,468 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:24,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:24,469 INFO L85 PathProgramCache]: Analyzing trace with hash 460751474, now seen corresponding path program 2 times [2023-11-26 11:45:24,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:24,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760472338] [2023-11-26 11:45:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:24,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:24,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675036068] [2023-11-26 11:45:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:45:24,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:24,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:45:24,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:45:24,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:24,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-26 11:45:24,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 128 proven. 84 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-11-26 11:45:25,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 128 proven. 76 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2023-11-26 11:45:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760472338] [2023-11-26 11:45:26,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675036068] [2023-11-26 11:45:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675036068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:26,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-26 11:45:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983877796] [2023-11-26 11:45:26,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:26,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:45:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:45:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:45:26,434 INFO L87 Difference]: Start difference. First operand 311 states and 328 transitions. Second operand has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 13 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (49), 11 states have call predecessors, (49), 13 states have call successors, (49) [2023-11-26 11:45:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:27,442 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2023-11-26 11:45:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:45:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 13 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (49), 11 states have call predecessors, (49), 13 states have call successors, (49) Word has length 155 [2023-11-26 11:45:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:27,446 INFO L225 Difference]: With dead ends: 329 [2023-11-26 11:45:27,446 INFO L226 Difference]: Without dead ends: 325 [2023-11-26 11:45:27,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:45:27,447 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:27,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 352 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:45:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-26 11:45:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 318. [2023-11-26 11:45:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 198 states have (on average 1.0404040404040404) internal successors, (206), 204 states have internal predecessors, (206), 65 states have call successors, (65), 55 states have call predecessors, (65), 54 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-26 11:45:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 334 transitions. [2023-11-26 11:45:27,561 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 334 transitions. Word has length 155 [2023-11-26 11:45:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:27,562 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 334 transitions. [2023-11-26 11:45:27,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 13 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (49), 11 states have call predecessors, (49), 13 states have call successors, (49) [2023-11-26 11:45:27,562 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 334 transitions. [2023-11-26 11:45:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-26 11:45:27,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:27,565 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:27,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:27,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:45:27,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:27,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1264679123, now seen corresponding path program 2 times [2023-11-26 11:45:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:27,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505882619] [2023-11-26 11:45:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:27,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:27,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:27,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439626731] [2023-11-26 11:45:27,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:45:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:27,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:27,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d224b74-6ea4-4f61-8414-079b05daf6f3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:45:27,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:45:27,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:27,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-26 11:45:27,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 204 proven. 88 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2023-11-26 11:45:29,111 INFO L327 TraceCheckSpWp]: Computing backward predicates...