./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-invariants/recursified_eq1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-invariants/recursified_eq1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccc7a7f0e01a15625c463b7f9ff86edec643fb5abfd6d827cfe7837ab94b8fae --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:09:26,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:09:26,981 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:09:26,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:09:26,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:09:27,038 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:09:27,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:09:27,039 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:09:27,040 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:09:27,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:09:27,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:09:27,047 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:09:27,048 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:09:27,049 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:09:27,050 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:09:27,050 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:09:27,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:09:27,051 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:09:27,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:09:27,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:09:27,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:09:27,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:09:27,053 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:09:27,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:09:27,054 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:09:27,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:09:27,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:09:27,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:09:27,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:09:27,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:09:27,058 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:09:27,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:09:27,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:09:27,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:09:27,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:09:27,059 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:09:27,059 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:09:27,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:09:27,060 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:09:27,060 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_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccc7a7f0e01a15625c463b7f9ff86edec643fb5abfd6d827cfe7837ab94b8fae [2023-11-19 07:09:27,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:09:27,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:09:27,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:09:27,386 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:09:27,387 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:09:27,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursified_loop-invariants/recursified_eq1.c [2023-11-19 07:09:30,418 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:09:30,589 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:09:30,590 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/sv-benchmarks/c/recursified_loop-invariants/recursified_eq1.c [2023-11-19 07:09:30,598 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/data/1df8ba360/4877f75a2e8146a0b5640f99af497ec8/FLAGac91e0d13 [2023-11-19 07:09:30,611 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/data/1df8ba360/4877f75a2e8146a0b5640f99af497ec8 [2023-11-19 07:09:30,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:09:30,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:09:30,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:09:30,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:09:30,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:09:30,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7662240b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30, skipping insertion in model container [2023-11-19 07:09:30,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,645 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:09:30,783 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_9c4b64be-ff25-469f-8fc0-3e79b34c41af/sv-benchmarks/c/recursified_loop-invariants/recursified_eq1.c[973,986] [2023-11-19 07:09:30,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:09:30,809 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:09:30,819 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_9c4b64be-ff25-469f-8fc0-3e79b34c41af/sv-benchmarks/c/recursified_loop-invariants/recursified_eq1.c[973,986] [2023-11-19 07:09:30,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:09:30,840 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:09:30,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30 WrapperNode [2023-11-19 07:09:30,841 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:09:30,842 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:09:30,842 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:09:30,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:09:30,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,860 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,889 INFO L138 Inliner]: procedures = 15, calls = 46, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-19 07:09:30,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:09:30,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:09:30,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:09:30,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:09:30,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,918 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,923 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,927 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:09:30,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:09:30,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:09:30,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:09:30,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (1/1) ... [2023-11-19 07:09:30,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:09:30,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:30,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:09:31,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:09:31,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:09:31,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:09:31,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:09:31,032 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_16_to_20_0 [2023-11-19 07:09:31,032 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_16_to_20_0 [2023-11-19 07:09:31,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:09:31,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:09:31,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:09:31,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:09:31,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:09:31,133 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:09:31,135 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:09:31,324 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:09:31,332 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:09:31,332 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:09:31,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:09:31 BoogieIcfgContainer [2023-11-19 07:09:31,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:09:31,339 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:09:31,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:09:31,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:09:31,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:09:30" (1/3) ... [2023-11-19 07:09:31,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff0c6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:09:31, skipping insertion in model container [2023-11-19 07:09:31,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:30" (2/3) ... [2023-11-19 07:09:31,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff0c6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:09:31, skipping insertion in model container [2023-11-19 07:09:31,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:09:31" (3/3) ... [2023-11-19 07:09:31,346 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_eq1.c [2023-11-19 07:09:31,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:09:31,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:09:31,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:09:31,413 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;@7aca4a28, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:09:31,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:09:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-19 07:09:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:09:31,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:31,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:31,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:31,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1045429526, now seen corresponding path program 1 times [2023-11-19 07:09:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:31,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465677535] [2023-11-19 07:09:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:31,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:32,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:32,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465677535] [2023-11-19 07:09:32,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465677535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:32,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:32,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:09:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592401725] [2023-11-19 07:09:32,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:09:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:09:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:09:32,281 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 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) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:32,416 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-11-19 07:09:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:09:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 07:09:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:32,427 INFO L225 Difference]: With dead ends: 37 [2023-11-19 07:09:32,427 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 07:09:32,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:09:32,433 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:32,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:09:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 07:09:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-11-19 07:09:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:09:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-19 07:09:32,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-11-19 07:09:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:32,479 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-19 07:09:32,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-19 07:09:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:09:32,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:32,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:09:32,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:32,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1045489108, now seen corresponding path program 1 times [2023-11-19 07:09:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:32,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407092730] [2023-11-19 07:09:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:32,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:32,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:32,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:32,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407092730] [2023-11-19 07:09:32,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407092730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:32,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:32,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:09:32,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321444032] [2023-11-19 07:09:32,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:09:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:09:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:09:32,721 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:32,773 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-19 07:09:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:09:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 07:09:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:32,775 INFO L225 Difference]: With dead ends: 23 [2023-11-19 07:09:32,775 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 07:09:32,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:09:32,778 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:32,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:09:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 07:09:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 07:09:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:09:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-19 07:09:32,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2023-11-19 07:09:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:32,784 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-19 07:09:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:09:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-19 07:09:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:09:32,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:32,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:32,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:09:32,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:32,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1415668676, now seen corresponding path program 1 times [2023-11-19 07:09:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:32,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083096000] [2023-11-19 07:09:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:33,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:09:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:33,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083096000] [2023-11-19 07:09:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083096000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469013101] [2023-11-19 07:09:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:33,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:33,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:33,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:33,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:09:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:33,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:09:33,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:34,036 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:09:34,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-11-19 07:09:36,552 WARN L854 $PredicateComparison]: unable to prove that (and (or (exists ((|v_old(#memory_int)_AFTER_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_2| |c_#memory_int|))) (let ((.cse1 (store |v_old(#memory_int)_AFTER_CALL_2| .cse0 (select |c_#memory_int| .cse0)))) (let ((.cse2 (@diff .cse1 |c_#memory_int|))) (and (not (= .cse0 |c_ULTIMATE.start_main_~#y~0#1.base|)) (= |c_#memory_int| (store .cse1 .cse2 (select |c_#memory_int| .cse2))) (not (= .cse0 |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#z~0#1.base|)) (= (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|))))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|))) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|))) is different from false [2023-11-19 07:09:36,557 WARN L876 $PredicateComparison]: unable to prove that (and (or (exists ((|v_old(#memory_int)_AFTER_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_2| |c_#memory_int|))) (let ((.cse1 (store |v_old(#memory_int)_AFTER_CALL_2| .cse0 (select |c_#memory_int| .cse0)))) (let ((.cse2 (@diff .cse1 |c_#memory_int|))) (and (not (= .cse0 |c_ULTIMATE.start_main_~#y~0#1.base|)) (= |c_#memory_int| (store .cse1 .cse2 (select |c_#memory_int| .cse2))) (not (= .cse0 |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#z~0#1.base|)) (= (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|))))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|))) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|))) is different from true [2023-11-19 07:09:36,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-19 07:09:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:36,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:36,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469013101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:36,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:09:36,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2023-11-19 07:09:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887861959] [2023-11-19 07:09:36,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:36,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:09:36,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:36,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:09:36,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=189, Unknown=5, NotChecked=28, Total=272 [2023-11-19 07:09:36,822 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:09:36,930 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|)))) (and (not (= |c_ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#w~0#1.base|)) (or (exists ((|v_old(#memory_int)_AFTER_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_2| |c_#memory_int|))) (let ((.cse1 (store |v_old(#memory_int)_AFTER_CALL_2| .cse0 (select |c_#memory_int| .cse0)))) (let ((.cse2 (@diff .cse1 |c_#memory_int|))) (and (not (= .cse0 |c_ULTIMATE.start_main_~#y~0#1.base|)) (= |c_#memory_int| (store .cse1 .cse2 (select |c_#memory_int| .cse2))) (not (= .cse0 |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#z~0#1.base|)) (= (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|))))))) .cse3) (not (= |c_ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#w~0#1.base| |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#w~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|)) .cse3)) is different from false [2023-11-19 07:09:37,042 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse3 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|)))) (and (not (= |c_ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#w~0#1.base|)) (or (exists ((|v_old(#memory_int)_AFTER_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_2| |c_#memory_int|))) (let ((.cse1 (store |v_old(#memory_int)_AFTER_CALL_2| .cse0 (select |c_#memory_int| .cse0)))) (let ((.cse2 (@diff .cse1 |c_#memory_int|))) (and (not (= .cse0 |c_ULTIMATE.start_main_~#y~0#1.base|)) (= |c_#memory_int| (store .cse1 .cse2 (select |c_#memory_int| .cse2))) (not (= .cse0 |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_main_~#z~0#1.base|)) (= (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) (select (select |v_old(#memory_int)_AFTER_CALL_2| |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|))))))) .cse3) (not (= |c_ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#w~0#1.base| |c_ULTIMATE.start_main_~#y~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#w~0#1.base| |c_ULTIMATE.start_main_~#z~0#1.base|)) .cse3)) is different from true [2023-11-19 07:09:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:37,123 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-19 07:09:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:09:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-11-19 07:09:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:37,125 INFO L225 Difference]: With dead ends: 30 [2023-11-19 07:09:37,125 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 07:09:37,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=76, Invalid=267, Unknown=7, NotChecked=70, Total=420 [2023-11-19 07:09:37,127 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:37,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 98 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2023-11-19 07:09:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 07:09:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2023-11-19 07:09:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 07:09:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-19 07:09:37,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 18 [2023-11-19 07:09:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:37,136 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-19 07:09:37,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:09:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-19 07:09:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:09:37,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:37,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:37,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:09:37,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:37,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:37,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1415728258, now seen corresponding path program 1 times [2023-11-19 07:09:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:37,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625792727] [2023-11-19 07:09:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:37,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:09:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625792727] [2023-11-19 07:09:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625792727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:38,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175731053] [2023-11-19 07:09:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:38,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:38,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:38,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:09:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:38,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:09:38,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:38,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:09:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:09:38,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 22 [2023-11-19 07:09:38,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-19 07:09:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:38,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:38,869 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:09:38,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 07:09:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:39,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175731053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:09:39,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:09:39,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-11-19 07:09:39,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583623112] [2023-11-19 07:09:39,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:39,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:09:39,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:09:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:09:39,182 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:09:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:40,393 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-11-19 07:09:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:09:40,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 18 [2023-11-19 07:09:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:40,395 INFO L225 Difference]: With dead ends: 30 [2023-11-19 07:09:40,396 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 07:09:40,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:09:40,397 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:40,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 81 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:09:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 07:09:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-11-19 07:09:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:09:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-11-19 07:09:40,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 18 [2023-11-19 07:09:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:40,411 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-11-19 07:09:40,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:09:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-11-19 07:09:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:09:40,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:40,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:40,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:09:40,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:40,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:40,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash 828862662, now seen corresponding path program 1 times [2023-11-19 07:09:40,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:40,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572983413] [2023-11-19 07:09:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:41,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:41,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:09:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:41,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:41,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572983413] [2023-11-19 07:09:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572983413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322367262] [2023-11-19 07:09:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:41,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:41,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:41,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:09:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:41,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-19 07:09:41,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:41,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 73 [2023-11-19 07:09:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:09:41,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 22 [2023-11-19 07:09:41,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-19 07:09:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:41,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:41,993 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:09:41,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 07:09:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:42,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322367262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:09:42,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:09:42,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2023-11-19 07:09:42,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438322675] [2023-11-19 07:09:42,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:42,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:09:42,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:09:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:09:42,316 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:09:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:43,354 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-11-19 07:09:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:09:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 18 [2023-11-19 07:09:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:43,357 INFO L225 Difference]: With dead ends: 36 [2023-11-19 07:09:43,357 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 07:09:43,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:09:43,358 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:43,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:09:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 07:09:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2023-11-19 07:09:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 07:09:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-11-19 07:09:43,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2023-11-19 07:09:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:43,376 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-11-19 07:09:43,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:09:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-11-19 07:09:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:09:43,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:43,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:43,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:09:43,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:43,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:43,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 828922244, now seen corresponding path program 1 times [2023-11-19 07:09:43,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:43,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448465875] [2023-11-19 07:09:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:43,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:09:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:44,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:44,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448465875] [2023-11-19 07:09:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448465875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:44,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586605415] [2023-11-19 07:09:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:44,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:44,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:44,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:09:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:44,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:09:44,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:44,365 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:09:44,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-11-19 07:09:44,423 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_159 Int) (func_to_recursive_line_16_to_20_0_~y.offset Int)) (= |c_#memory_int| (store (store |c_old(#memory_int)| |c_func_to_recursive_line_16_to_20_0_#in~y.base| (store (select |c_old(#memory_int)| |c_func_to_recursive_line_16_to_20_0_#in~y.base|) func_to_recursive_line_16_to_20_0_~y.offset v_ArrVal_159)) |c_func_to_recursive_line_16_to_20_0_#in~z.base| (select |c_#memory_int| |c_func_to_recursive_line_16_to_20_0_#in~z.base|)))) is different from true [2023-11-19 07:09:44,457 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:09:44,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2023-11-19 07:09:44,486 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:09:44,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-19 07:09:44,514 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:09:44,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2023-11-19 07:09:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-19 07:09:44,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586605415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:44,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:09:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-19 07:09:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748524086] [2023-11-19 07:09:44,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:44,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:09:44,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:44,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:09:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=117, Unknown=3, NotChecked=22, Total=182 [2023-11-19 07:09:44,727 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:09:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:09:44,882 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-11-19 07:09:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:09:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-11-19 07:09:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:09:44,884 INFO L225 Difference]: With dead ends: 30 [2023-11-19 07:09:44,884 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 07:09:44,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=178, Unknown=3, NotChecked=28, Total=272 [2023-11-19 07:09:44,885 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:09:44,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 47 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2023-11-19 07:09:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 07:09:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-19 07:09:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 07:09:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-19 07:09:44,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 18 [2023-11-19 07:09:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:09:44,895 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-19 07:09:44,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:09:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-19 07:09:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:09:44,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:09:44,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:44,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:09:45,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:09:45,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:09:45,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1748923148, now seen corresponding path program 1 times [2023-11-19 07:09:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717167000] [2023-11-19 07:09:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:09:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:09:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:09:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:09:47,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717167000] [2023-11-19 07:09:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717167000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445463666] [2023-11-19 07:09:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:47,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:47,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:47,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:09:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:47,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-19 07:09:47,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:47,525 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:09:47,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-11-19 07:09:47,733 WARN L876 $PredicateComparison]: unable to prove that (exists ((func_to_recursive_line_16_to_20_0_~w.offset Int)) (= |c_#memory_int| (store (store |c_old(#memory_int)| |c_func_to_recursive_line_16_to_20_0_#in~w.base| (let ((.cse0 (select |c_old(#memory_int)| |c_func_to_recursive_line_16_to_20_0_#in~w.base|))) (store .cse0 func_to_recursive_line_16_to_20_0_~w.offset (+ (select .cse0 func_to_recursive_line_16_to_20_0_~w.offset) 1)))) |c_func_to_recursive_line_16_to_20_0_#in~x.base| (select |c_#memory_int| |c_func_to_recursive_line_16_to_20_0_#in~x.base|)))) is different from true [2023-11-19 07:09:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:09:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:09:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:09:47,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 39 [2023-11-19 07:09:47,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-19 07:09:47,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-19 07:09:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 5 not checked. [2023-11-19 07:09:47,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:50,347 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_232 (Array Int Int)) (v_func_to_recursive_line_16_to_20_0_~w.offset_50 Int)) (let ((.cse0 (store (let ((.cse1 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base| (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base|))) (store .cse5 |c_ULTIMATE.start_main_~#y~0#1.offset| (+ (- 1) (select .cse5 |c_ULTIMATE.start_main_~#y~0#1.offset|))))))) (store .cse3 |c_ULTIMATE.start_main_~#z~0#1.base| (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#z~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~#z~0#1.offset| (+ (- 1) (select .cse4 |c_ULTIMATE.start_main_~#z~0#1.offset|)))))))) (store .cse1 |c_ULTIMATE.start_main_~#w~0#1.base| (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#w~0#1.base|))) (store .cse2 v_func_to_recursive_line_16_to_20_0_~w.offset_50 (+ (select .cse2 v_func_to_recursive_line_16_to_20_0_~w.offset_50) 1))))) |c_ULTIMATE.start_main_~#x~0#1.base| v_ArrVal_232))) (= (mod (select (select .cse0 |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) 4294967296) (mod (select (select .cse0 |c_ULTIMATE.start_main_~#z~0#1.base|) |c_ULTIMATE.start_main_~#z~0#1.offset|) 4294967296)))) is different from false [2023-11-19 07:09:50,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445463666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:50,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:09:50,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2023-11-19 07:09:50,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637487032] [2023-11-19 07:09:50,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:09:50,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:09:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:09:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=386, Unknown=2, NotChecked=82, Total=552 [2023-11-19 07:09:50,354 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 21 states have internal predecessors, (31), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 07:09:52,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:09:56,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:09:58,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:00,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:02,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:07,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:09,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:11,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:13,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:15,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:17,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:10:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:10:17,788 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-11-19 07:10:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:10:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 21 states have internal predecessors, (31), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 24 [2023-11-19 07:10:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:10:17,790 INFO L225 Difference]: With dead ends: 46 [2023-11-19 07:10:17,790 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 07:10:17,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=144, Invalid=730, Unknown=4, NotChecked=114, Total=992 [2023-11-19 07:10:17,792 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 17 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:10:17,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 149 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 257 Invalid, 11 Unknown, 50 Unchecked, 22.9s Time] [2023-11-19 07:10:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 07:10:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-11-19 07:10:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (16), 8 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 07:10:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-11-19 07:10:17,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 24 [2023-11-19 07:10:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:10:17,802 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-11-19 07:10:17,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 21 states have internal predecessors, (31), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 07:10:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-11-19 07:10:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:10:17,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:10:17,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:10:17,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:10:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:10:18,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:10:18,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:10:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1339843084, now seen corresponding path program 2 times [2023-11-19 07:10:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:10:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185761167] [2023-11-19 07:10:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:10:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:10:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:10:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:19,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:10:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:10:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:10:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:10:19,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185761167] [2023-11-19 07:10:19,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185761167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:10:19,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17183076] [2023-11-19 07:10:19,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:10:19,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:10:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:10:19,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:10:19,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c4b64be-ff25-469f-8fc0-3e79b34c41af/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:10:20,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:10:20,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:10:20,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-19 07:10:20,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:10:20,200 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-19 07:10:20,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2023-11-19 07:10:20,620 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_1 (Array Int Int)) (func_to_recursive_line_16_to_20_0_~w.offset Int)) (= (let ((.cse0 (let ((.cse2 (store (store |c_old(#memory_int)| |c_func_to_recursive_line_16_to_20_0_#in~w.base| (let ((.cse4 (select |c_old(#memory_int)| |c_func_to_recursive_line_16_to_20_0_#in~w.base|))) (store .cse4 func_to_recursive_line_16_to_20_0_~w.offset (+ (select .cse4 func_to_recursive_line_16_to_20_0_~w.offset) 1)))) |c_func_to_recursive_line_16_to_20_0_#in~x.base| v_DerPreprocessor_1))) (store .cse2 |c_func_to_recursive_line_16_to_20_0_#in~y.base| (let ((.cse3 (select .cse2 |c_func_to_recursive_line_16_to_20_0_#in~y.base|))) (store .cse3 |c_func_to_recursive_line_16_to_20_0_#in~y.offset| (+ (- 1) (select .cse3 |c_func_to_recursive_line_16_to_20_0_#in~y.offset|)))))))) (store .cse0 |c_func_to_recursive_line_16_to_20_0_#in~z.base| (let ((.cse1 (select .cse0 |c_func_to_recursive_line_16_to_20_0_#in~z.base|))) (store .cse1 |c_func_to_recursive_line_16_to_20_0_#in~z.offset| (+ (- 1) (select .cse1 |c_func_to_recursive_line_16_to_20_0_#in~z.offset|)))))) |c_#memory_int|)) is different from true [2023-11-19 07:10:20,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 113 [2023-11-19 07:10:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:10:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:10:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:10:20,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2023-11-19 07:10:20,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 07:10:20,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-19 07:10:20,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-19 07:10:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-11-19 07:10:20,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:10:23,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17183076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:10:23,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:10:23,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2023-11-19 07:10:23,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34216907] [2023-11-19 07:10:23,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:10:23,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:10:23,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:10:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:10:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=423, Unknown=2, NotChecked=42, Total=552 [2023-11-19 07:10:23,919 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)