./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/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_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/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_02318e53-5e7d-4e69-9533-ccb3790464c2/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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:01:32,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:01:32,220 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:01:32,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:01:32,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:01:32,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:01:32,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:01:32,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:01:32,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:01:32,256 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:01:32,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:01:32,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:01:32,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:01:32,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:01:32,259 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:01:32,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:01:32,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:01:32,261 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:01:32,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:01:32,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:01:32,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:01:32,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:01:32,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:01:32,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:01:32,264 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:01:32,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:01:32,265 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:01:32,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:01:32,266 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:01:32,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:01:32,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:01:32,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:01:32,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:01:32,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:01:32,269 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:01:32,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:01:32,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:01:32,270 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:01:32,270 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:01:32,271 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:01:32,271 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:01:32,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:01:32,272 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_02318e53-5e7d-4e69-9533-ccb3790464c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2023-11-26 12:01:32,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:01:32,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:01:32,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:01:32,539 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:01:32,540 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:01:32,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2023-11-26 12:01:35,741 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:01:36,057 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:01:36,059 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/sv-benchmarks/c/recursive/MultCommutative-2.c [2023-11-26 12:01:36,068 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/data/64fd3a3ec/d5b38bc06a204aaf957814d4742735e5/FLAG059b34b23 [2023-11-26 12:01:36,087 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/data/64fd3a3ec/d5b38bc06a204aaf957814d4742735e5 [2023-11-26 12:01:36,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:01:36,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:01:36,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:01:36,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:01:36,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:01:36,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,109 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59e5ef24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36, skipping insertion in model container [2023-11-26 12:01:36,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,137 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:01:36,296 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_02318e53-5e7d-4e69-9533-ccb3790464c2/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2023-11-26 12:01:36,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:01:36,315 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:01:36,343 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_02318e53-5e7d-4e69-9533-ccb3790464c2/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2023-11-26 12:01:36,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:01:36,367 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:01:36,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36 WrapperNode [2023-11-26 12:01:36,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:01:36,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:01:36,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:01:36,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:01:36,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,407 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2023-11-26 12:01:36,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:01:36,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:01:36,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:01:36,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:01:36,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,443 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 12:01:36,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,460 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:01:36,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:01:36,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:01:36,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:01:36,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (1/1) ... [2023-11-26 12:01:36,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:01:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:36,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:01:36,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:01:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:01:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2023-11-26 12:01:36,543 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2023-11-26 12:01:36,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:01:36,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:01:36,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:01:36,609 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:01:36,612 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:01:36,818 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:01:36,842 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:01:36,853 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 12:01:36,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:01:36 BoogieIcfgContainer [2023-11-26 12:01:36,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:01:36,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:01:36,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:01:36,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:01:36,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:01:36" (1/3) ... [2023-11-26 12:01:36,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30737b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:01:36, skipping insertion in model container [2023-11-26 12:01:36,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:36" (2/3) ... [2023-11-26 12:01:36,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30737b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:01:36, skipping insertion in model container [2023-11-26 12:01:36,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:01:36" (3/3) ... [2023-11-26 12:01:36,868 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2023-11-26 12:01:36,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:01:36,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:01:36,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:01:36,971 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;@57db9bfe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:01:36,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:01:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:01:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 12:01:36,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:36,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:36,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:36,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 647179642, now seen corresponding path program 1 times [2023-11-26 12:01:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:37,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216260036] [2023-11-26 12:01:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:37,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:37,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:01:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:01:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216260036] [2023-11-26 12:01:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216260036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:37,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:37,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:01:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036735372] [2023-11-26 12:01:37,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:37,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:01:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:01:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:01:37,630 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:01:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:37,803 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2023-11-26 12:01:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:01:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-26 12:01:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:37,813 INFO L225 Difference]: With dead ends: 37 [2023-11-26 12:01:37,813 INFO L226 Difference]: Without dead ends: 27 [2023-11-26 12:01:37,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:01:37,818 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:37,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-26 12:01:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-26 12:01:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-26 12:01:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-26 12:01:37,862 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 19 [2023-11-26 12:01:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:37,863 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-26 12:01:37,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:01:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-26 12:01:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 12:01:37,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:37,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:37,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:01:37,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:37,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1580415186, now seen corresponding path program 1 times [2023-11-26 12:01:37,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:37,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959477377] [2023-11-26 12:01:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:38,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:01:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:38,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:01:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:38,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959477377] [2023-11-26 12:01:38,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959477377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:38,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744491726] [2023-11-26 12:01:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:38,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:38,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:38,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:38,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:01:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:38,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:01:38,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:01:38,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:01:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744491726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:38,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-11-26 12:01:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593451103] [2023-11-26 12:01:38,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:38,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:01:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:01:38,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:01:38,489 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 12:01:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:38,704 INFO L93 Difference]: Finished difference Result 51 states and 82 transitions. [2023-11-26 12:01:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:01:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2023-11-26 12:01:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:38,706 INFO L225 Difference]: With dead ends: 51 [2023-11-26 12:01:38,707 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 12:01:38,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:01:38,710 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:38,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 12:01:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-26 12:01:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 12:01:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-26 12:01:38,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 25 [2023-11-26 12:01:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:38,725 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-26 12:01:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 12:01:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-26 12:01:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 12:01:38,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:38,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:38,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:38,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:38,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:38,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash -590605896, now seen corresponding path program 1 times [2023-11-26 12:01:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:38,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277815623] [2023-11-26 12:01:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:01:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 12:01:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277815623] [2023-11-26 12:01:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277815623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:01:39,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:01:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:01:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868367313] [2023-11-26 12:01:39,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:01:39,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:01:39,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:01:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:01:39,111 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 12:01:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:39,159 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-26 12:01:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:01:39,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-11-26 12:01:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:39,161 INFO L225 Difference]: With dead ends: 30 [2023-11-26 12:01:39,161 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 12:01:39,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 12:01:39,163 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:39,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:01:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 12:01:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-26 12:01:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 12:01:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-26 12:01:39,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 26 [2023-11-26 12:01:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:39,172 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-26 12:01:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 12:01:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-26 12:01:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:01:39,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:39,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:39,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:01:39,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:39,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 132154764, now seen corresponding path program 2 times [2023-11-26 12:01:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:39,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965629143] [2023-11-26 12:01:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:01:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 12:01:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:39,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965629143] [2023-11-26 12:01:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965629143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997978806] [2023-11-26 12:01:39,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:01:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:39,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:01:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:01:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:39,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 12:01:39,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:01:40,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:01:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997978806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:41,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:41,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2023-11-26 12:01:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727138142] [2023-11-26 12:01:41,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:41,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-26 12:01:41,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-26 12:01:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2023-11-26 12:01:41,714 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 40 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-26 12:01:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:42,319 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-11-26 12:01:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:01:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 33 [2023-11-26 12:01:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:42,321 INFO L225 Difference]: With dead ends: 39 [2023-11-26 12:01:42,321 INFO L226 Difference]: Without dead ends: 35 [2023-11-26 12:01:42,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2023-11-26 12:01:42,326 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:42,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 133 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:01:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-26 12:01:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-26 12:01:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-26 12:01:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-11-26 12:01:42,346 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 33 [2023-11-26 12:01:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:42,347 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-11-26 12:01:42,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-26 12:01:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-11-26 12:01:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:01:42,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:42,359 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:42,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:42,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:42,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:42,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:42,570 INFO L85 PathProgramCache]: Analyzing trace with hash 735115528, now seen corresponding path program 3 times [2023-11-26 12:01:42,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:42,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055519361] [2023-11-26 12:01:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:42,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:43,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:01:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:43,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-26 12:01:43,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055519361] [2023-11-26 12:01:43,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055519361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311350065] [2023-11-26 12:01:43,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:01:43,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:43,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:43,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:43,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:01:43,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-26 12:01:43,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:43,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-26 12:01:43,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 12:01:43,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 12:01:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311350065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:45,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:45,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 47 [2023-11-26 12:01:45,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864909095] [2023-11-26 12:01:45,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-26 12:01:45,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:45,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-26 12:01:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1990, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 12:01:45,518 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 47 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 32 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-26 12:01:47,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:47,138 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2023-11-26 12:01:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 12:01:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 32 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) Word has length 40 [2023-11-26 12:01:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:47,142 INFO L225 Difference]: With dead ends: 67 [2023-11-26 12:01:47,142 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 12:01:47,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=485, Invalid=3937, Unknown=0, NotChecked=0, Total=4422 [2023-11-26 12:01:47,146 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:47,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 272 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 12:01:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 12:01:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2023-11-26 12:01:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 8 states have return successors, (29), 11 states have call predecessors, (29), 7 states have call successors, (29) [2023-11-26 12:01:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2023-11-26 12:01:47,185 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 40 [2023-11-26 12:01:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:47,187 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2023-11-26 12:01:47,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 32 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-26 12:01:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2023-11-26 12:01:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:01:47,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:47,189 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:47,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:47,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:47,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:47,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2110838554, now seen corresponding path program 4 times [2023-11-26 12:01:47,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:47,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432846714] [2023-11-26 12:01:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:47,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:01:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:47,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-26 12:01:48,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432846714] [2023-11-26 12:01:48,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432846714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:48,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440140939] [2023-11-26 12:01:48,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:01:48,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:48,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:48,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:48,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:01:48,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:01:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:48,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-26 12:01:48,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 12:01:48,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 12:01:49,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440140939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:49,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:49,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 46 [2023-11-26 12:01:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38165680] [2023-11-26 12:01:49,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:49,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-26 12:01:49,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-26 12:01:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2023-11-26 12:01:49,832 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 31 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-26 12:01:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:51,111 INFO L93 Difference]: Finished difference Result 80 states and 124 transitions. [2023-11-26 12:01:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 12:01:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 31 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) Word has length 40 [2023-11-26 12:01:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:51,116 INFO L225 Difference]: With dead ends: 80 [2023-11-26 12:01:51,116 INFO L226 Difference]: Without dead ends: 70 [2023-11-26 12:01:51,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=494, Invalid=3928, Unknown=0, NotChecked=0, Total=4422 [2023-11-26 12:01:51,120 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:51,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 285 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:01:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-26 12:01:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2023-11-26 12:01:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) [2023-11-26 12:01:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 94 transitions. [2023-11-26 12:01:51,149 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 94 transitions. Word has length 40 [2023-11-26 12:01:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:51,149 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 94 transitions. [2023-11-26 12:01:51,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 31 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-26 12:01:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 94 transitions. [2023-11-26 12:01:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 12:01:51,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:51,153 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:51,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:51,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 12:01:51,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:51,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -577127850, now seen corresponding path program 1 times [2023-11-26 12:01:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:51,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694563024] [2023-11-26 12:01:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 12:01:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:01:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-26 12:01:51,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694563024] [2023-11-26 12:01:51,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694563024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:51,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171920157] [2023-11-26 12:01:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:51,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:51,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:51,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:01:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:51,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:01:51,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-26 12:01:51,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 35 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 12:01:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171920157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:51,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:51,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-11-26 12:01:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450896974] [2023-11-26 12:01:51,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:01:51,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:01:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:01:51,922 INFO L87 Difference]: Start difference. First operand 55 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-26 12:01:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:52,020 INFO L93 Difference]: Finished difference Result 78 states and 127 transitions. [2023-11-26 12:01:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:01:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2023-11-26 12:01:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:52,026 INFO L225 Difference]: With dead ends: 78 [2023-11-26 12:01:52,027 INFO L226 Difference]: Without dead ends: 43 [2023-11-26 12:01:52,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:01:52,034 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:52,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:01:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-26 12:01:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-26 12:01:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-26 12:01:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2023-11-26 12:01:52,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 60 [2023-11-26 12:01:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:52,057 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2023-11-26 12:01:52,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-26 12:01:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2023-11-26 12:01:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 12:01:52,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:52,060 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:52,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:01:52,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:52,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:52,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash 396340908, now seen corresponding path program 5 times [2023-11-26 12:01:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260007690] [2023-11-26 12:01:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:52,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:52,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-26 12:01:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-26 12:01:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260007690] [2023-11-26 12:01:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260007690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299215275] [2023-11-26 12:01:53,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:01:53,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:53,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:53,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:01:53,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-26 12:01:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:53,456 WARN L260 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-26 12:01:53,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-26 12:01:53,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:01:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-26 12:01:55,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299215275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:01:55,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:01:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 42 [2023-11-26 12:01:55,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018678921] [2023-11-26 12:01:55,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:01:55,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-26 12:01:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:01:55,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-26 12:01:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 12:01:55,538 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 42 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 27 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-26 12:01:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:01:56,526 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2023-11-26 12:01:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 12:01:56,527 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 27 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2023-11-26 12:01:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:01:56,529 INFO L225 Difference]: With dead ends: 62 [2023-11-26 12:01:56,529 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 12:01:56,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=366, Invalid=3174, Unknown=0, NotChecked=0, Total=3540 [2023-11-26 12:01:56,531 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:01:56,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 256 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:01:56,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 12:01:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-11-26 12:01:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (19), 10 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-26 12:01:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-11-26 12:01:56,554 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 61 [2023-11-26 12:01:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:01:56,554 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-11-26 12:01:56,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 27 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-26 12:01:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-11-26 12:01:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 12:01:56,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:01:56,556 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:01:56,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 12:01:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:56,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:01:56,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:01:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash 834620298, now seen corresponding path program 6 times [2023-11-26 12:01:56,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:01:56,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249469039] [2023-11-26 12:01:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:01:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:01:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:01:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:57,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:01:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:01:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-26 12:01:58,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:01:58,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249469039] [2023-11-26 12:01:58,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249469039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:01:58,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458565010] [2023-11-26 12:01:58,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:01:58,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:01:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:01:58,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:01:58,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:01:58,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-26 12:01:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:01:58,179 WARN L260 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-26 12:01:58,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:01:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-26 12:01:58,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 115 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-26 12:02:01,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458565010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:01,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:01,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 27] total 56 [2023-11-26 12:02:01,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858329238] [2023-11-26 12:02:01,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:01,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-26 12:02:01,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:01,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-26 12:02:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2876, Unknown=0, NotChecked=0, Total=3080 [2023-11-26 12:02:01,021 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 56 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 35 states have internal predecessors, (74), 12 states have call successors, (12), 1 states have call predecessors, (12), 15 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-26 12:02:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:02,395 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-11-26 12:02:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 12:02:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 35 states have internal predecessors, (74), 12 states have call successors, (12), 1 states have call predecessors, (12), 15 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) Word has length 61 [2023-11-26 12:02:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:02,397 INFO L225 Difference]: With dead ends: 65 [2023-11-26 12:02:02,397 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 12:02:02,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=540, Invalid=5312, Unknown=0, NotChecked=0, Total=5852 [2023-11-26 12:02:02,401 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:02,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 388 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 12:02:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 12:02:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-11-26 12:02:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (22), 11 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-26 12:02:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-26 12:02:02,411 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 61 [2023-11-26 12:02:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:02,411 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-26 12:02:02,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 35 states have internal predecessors, (74), 12 states have call successors, (12), 1 states have call predecessors, (12), 15 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-26 12:02:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-26 12:02:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 12:02:02,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:02,413 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:02,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:02,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:02,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1250404822, now seen corresponding path program 7 times [2023-11-26 12:02:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:02,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327326496] [2023-11-26 12:02:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:02,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 12:02:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-26 12:02:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327326496] [2023-11-26 12:02:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327326496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973727240] [2023-11-26 12:02:03,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 12:02:03,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:03,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:03,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:03,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:02:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:03,804 WARN L260 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-26 12:02:03,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-26 12:02:04,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-26 12:02:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973727240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:06,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 21] total 51 [2023-11-26 12:02:06,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450663471] [2023-11-26 12:02:06,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-26 12:02:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-26 12:02:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2023-11-26 12:02:06,155 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-26 12:02:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:07,666 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2023-11-26 12:02:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 12:02:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) Word has length 61 [2023-11-26 12:02:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:07,669 INFO L225 Difference]: With dead ends: 70 [2023-11-26 12:02:07,669 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 12:02:07,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=556, Invalid=4846, Unknown=0, NotChecked=0, Total=5402 [2023-11-26 12:02:07,672 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:07,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 12:02:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 12:02:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2023-11-26 12:02:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (21), 11 states have call predecessors, (21), 7 states have call successors, (21) [2023-11-26 12:02:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-11-26 12:02:07,697 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 61 [2023-11-26 12:02:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:07,698 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-11-26 12:02:07,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-26 12:02:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-11-26 12:02:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-26 12:02:07,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:07,701 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:07,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:07,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:02:07,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:07,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1515345786, now seen corresponding path program 8 times [2023-11-26 12:02:07,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:07,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437329167] [2023-11-26 12:02:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:07,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:02:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:08,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:09,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-26 12:02:09,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:09,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437329167] [2023-11-26 12:02:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437329167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595216641] [2023-11-26 12:02:09,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:02:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:09,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:09,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:09,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:02:09,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:02:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:02:09,382 WARN L260 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjunts are in the unsatisfiable core [2023-11-26 12:02:09,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-26 12:02:10,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-26 12:02:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595216641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:12,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 30] total 62 [2023-11-26 12:02:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161709836] [2023-11-26 12:02:12,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-26 12:02:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-26 12:02:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3556, Unknown=0, NotChecked=0, Total=3782 [2023-11-26 12:02:12,753 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 62 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2023-11-26 12:02:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:14,283 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2023-11-26 12:02:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-26 12:02:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 68 [2023-11-26 12:02:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:14,285 INFO L225 Difference]: With dead ends: 70 [2023-11-26 12:02:14,285 INFO L226 Difference]: Without dead ends: 63 [2023-11-26 12:02:14,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=616, Invalid=6356, Unknown=0, NotChecked=0, Total=6972 [2023-11-26 12:02:14,289 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:14,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 386 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 12:02:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-26 12:02:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2023-11-26 12:02:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (24), 12 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-26 12:02:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2023-11-26 12:02:14,300 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 68 [2023-11-26 12:02:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:14,301 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2023-11-26 12:02:14,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2023-11-26 12:02:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2023-11-26 12:02:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-26 12:02:14,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:14,303 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:14,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:14,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 12:02:14,509 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:14,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash -335813798, now seen corresponding path program 9 times [2023-11-26 12:02:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:14,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572260213] [2023-11-26 12:02:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:14,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 12:02:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:15,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 12:02:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-26 12:02:16,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572260213] [2023-11-26 12:02:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572260213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954661980] [2023-11-26 12:02:16,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:02:16,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:16,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:16,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02318e53-5e7d-4e69-9533-ccb3790464c2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:02:16,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-26 12:02:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:02:16,266 WARN L260 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-26 12:02:16,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 18 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-26 12:02:17,330 INFO L327 TraceCheckSpWp]: Computing backward predicates...