./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn1f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn1f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 18b341884f23a5462ed7b5a2994c7faf53737afb439f1d86e003040fe93a66eb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:05:41,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:05:41,714 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:05:41,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:05:41,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:05:41,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:05:41,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:05:41,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:05:41,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:05:41,750 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:05:41,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:05:41,751 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:05:41,752 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:05:41,752 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:05:41,753 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:05:41,754 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:05:41,754 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:05:41,755 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:05:41,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:05:41,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:05:41,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:05:41,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:05:41,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:05:41,758 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:05:41,758 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:05:41,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:05:41,759 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:05:41,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:05:41,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:05:41,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:05:41,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:05:41,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:41,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:05:41,763 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:05:41,763 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:05:41,763 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:05:41,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:05:41,764 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:05:41,765 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:05:41,765 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:05:41,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:05:41,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:05:41,767 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_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b341884f23a5462ed7b5a2994c7faf53737afb439f1d86e003040fe93a66eb [2023-11-21 22:05:42,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:05:42,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:05:42,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:05:42,069 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:05:42,070 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:05:42,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/array-fpi/eqn1f.c [2023-11-21 22:05:45,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:05:45,608 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:05:45,611 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/sv-benchmarks/c/array-fpi/eqn1f.c [2023-11-21 22:05:45,622 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/data/66414a910/721070266df5459885ff89cb206f15b9/FLAG802e29b83 [2023-11-21 22:05:45,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/data/66414a910/721070266df5459885ff89cb206f15b9 [2023-11-21 22:05:45,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:05:45,655 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:05:45,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:45,658 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:05:45,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:05:45,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:45" (1/1) ... [2023-11-21 22:05:45,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368634e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:45, skipping insertion in model container [2023-11-21 22:05:45,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:45" (1/1) ... [2023-11-21 22:05:45,701 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:05:45,934 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_192f6238-a29e-454a-82af-2a9d684415c7/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2023-11-21 22:05:45,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:45,996 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:05:46,018 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_192f6238-a29e-454a-82af-2a9d684415c7/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2023-11-21 22:05:46,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:46,051 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:05:46,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46 WrapperNode [2023-11-21 22:05:46,052 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:46,053 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:46,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:05:46,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:05:46,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,112 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2023-11-21 22:05:46,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:46,114 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:05:46,114 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:05:46,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:05:46,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,130 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,144 INFO L187 HeapSplitter]: Split 18 memory accesses to 4 slices as follows [2, 4, 8, 4] [2023-11-21 22:05:46,145 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,158 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,160 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,164 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:05:46,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:05:46,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:05:46,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:05:46,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (1/1) ... [2023-11-21 22:05:46,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:46,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:05:46,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:05:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:05:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:05:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:05:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:05:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 22:05:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:05:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:05:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 22:05:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-21 22:05:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:05:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:05:46,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:05:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:05:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:05:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-21 22:05:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-21 22:05:46,371 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:05:46,374 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:05:46,571 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:05:46,646 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:05:46,647 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:05:46,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:46 BoogieIcfgContainer [2023-11-21 22:05:46,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:05:46,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:05:46,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:05:46,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:05:46,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:05:45" (1/3) ... [2023-11-21 22:05:46,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f561f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:46, skipping insertion in model container [2023-11-21 22:05:46,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:46" (2/3) ... [2023-11-21 22:05:46,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f561f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:46, skipping insertion in model container [2023-11-21 22:05:46,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:46" (3/3) ... [2023-11-21 22:05:46,657 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn1f.c [2023-11-21 22:05:46,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:05:46,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:05:46,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:46,784 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;@552de01c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:46,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:05:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:05:46,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:46,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:46,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:46,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1725211630, now seen corresponding path program 1 times [2023-11-21 22:05:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759673796] [2023-11-21 22:05:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:47,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:47,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105286005] [2023-11-21 22:05:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:47,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:47,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:05:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:05:47,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:47,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:47,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759673796] [2023-11-21 22:05:47,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:05:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105286005] [2023-11-21 22:05:47,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105286005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:47,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:05:47,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586345915] [2023-11-21 22:05:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:47,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:47,438 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:47,566 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-21 22:05:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:47,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:05:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:47,577 INFO L225 Difference]: With dead ends: 29 [2023-11-21 22:05:47,577 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 22:05:47,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:47,586 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:47,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 22:05:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-11-21 22:05:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-21 22:05:47,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2023-11-21 22:05:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:47,620 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-21 22:05:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-21 22:05:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:05:47,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:47,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:47,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:05:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:05:47,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:47,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:47,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1937272901, now seen corresponding path program 1 times [2023-11-21 22:05:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143741441] [2023-11-21 22:05:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:47,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:47,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:47,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278014462] [2023-11-21 22:05:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:47,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:47,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:47,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:47,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:05:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:47,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:05:47,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:48,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:48,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143741441] [2023-11-21 22:05:48,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:05:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278014462] [2023-11-21 22:05:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278014462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:48,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:05:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734687429] [2023-11-21 22:05:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:48,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:05:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:05:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:05:48,008 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:48,070 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-11-21 22:05:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:05:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:05:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:48,073 INFO L225 Difference]: With dead ends: 25 [2023-11-21 22:05:48,073 INFO L226 Difference]: Without dead ends: 19 [2023-11-21 22:05:48,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:48,078 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:48,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:05:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-21 22:05:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2023-11-21 22:05:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2023-11-21 22:05:48,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2023-11-21 22:05:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:48,102 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2023-11-21 22:05:48,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2023-11-21 22:05:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:05:48,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:48,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:48,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:48,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:48,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 752672381, now seen corresponding path program 1 times [2023-11-21 22:05:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336962912] [2023-11-21 22:05:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:48,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:48,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632842698] [2023-11-21 22:05:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:48,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:48,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:48,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:05:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:48,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:05:48,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:48,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:05:48,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-21 22:05:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:05:48,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:05:48,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:48,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336962912] [2023-11-21 22:05:48,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:05:48,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632842698] [2023-11-21 22:05:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632842698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:48,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:05:48,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-21 22:05:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604639788] [2023-11-21 22:05:48,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:48,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:05:48,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:05:48,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:05:48,754 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:48,821 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2023-11-21 22:05:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:05:48,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-21 22:05:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:48,822 INFO L225 Difference]: With dead ends: 19 [2023-11-21 22:05:48,822 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 22:05:48,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:05:48,825 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:48,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 7 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:05:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 22:05:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2023-11-21 22:05:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-21 22:05:48,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2023-11-21 22:05:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:48,833 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-21 22:05:48,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-21 22:05:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:05:48,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:48,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:48,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:49,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:49,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2088728520, now seen corresponding path program 1 times [2023-11-21 22:05:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:49,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761138389] [2023-11-21 22:05:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:49,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:49,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936420324] [2023-11-21 22:05:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:49,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:49,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:49,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:05:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:49,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:05:49,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:49,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:05:49,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761138389] [2023-11-21 22:05:49,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:05:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936420324] [2023-11-21 22:05:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936420324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:49,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:05:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515246096] [2023-11-21 22:05:49,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:49,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:49,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:49,255 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:49,335 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-21 22:05:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:05:49,335 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 22:05:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:49,337 INFO L225 Difference]: With dead ends: 24 [2023-11-21 22:05:49,337 INFO L226 Difference]: Without dead ends: 14 [2023-11-21 22:05:49,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:05:49,340 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:49,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:05:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-21 22:05:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-21 22:05:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-21 22:05:49,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-21 22:05:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:49,352 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-21 22:05:49,352 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-21 22:05:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:05:49,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:49,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:49,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:49,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:49,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:49,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1156116663, now seen corresponding path program 1 times [2023-11-21 22:05:49,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:49,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780188301] [2023-11-21 22:05:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:49,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:49,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974532492] [2023-11-21 22:05:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:49,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:49,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:49,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:05:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:49,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-21 22:05:49,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:49,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:49,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:05:49,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:05:49,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-21 22:05:49,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 22:05:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:50,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:05:50,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780188301] [2023-11-21 22:05:50,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:05:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974532492] [2023-11-21 22:05:50,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974532492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:50,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:05:50,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2023-11-21 22:05:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080214430] [2023-11-21 22:05:50,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:05:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:05:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:05:50,420 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:50,863 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-21 22:05:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:05:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 22:05:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:50,866 INFO L225 Difference]: With dead ends: 19 [2023-11-21 22:05:50,866 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 22:05:50,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:05:50,869 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:50,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 16 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:05:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 22:05:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-21 22:05:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-21 22:05:50,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2023-11-21 22:05:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:50,883 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-21 22:05:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-21 22:05:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:05:50,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:50,884 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:50,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:51,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:51,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:51,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash -523527427, now seen corresponding path program 2 times [2023-11-21 22:05:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:51,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449760733] [2023-11-21 22:05:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:51,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:51,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096964467] [2023-11-21 22:05:51,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:05:51,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:51,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:51,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:05:51,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:05:51,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:05:51,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:05:51,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:05:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:05:51,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:05:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:05:51,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:51,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449760733] [2023-11-21 22:05:51,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:05:51,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096964467] [2023-11-21 22:05:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096964467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:05:51,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:05:51,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-21 22:05:51,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185511532] [2023-11-21 22:05:51,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:05:51,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:05:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:05:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:05:51,417 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:05:51,554 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-21 22:05:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:05:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:05:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:05:51,555 INFO L225 Difference]: With dead ends: 39 [2023-11-21 22:05:51,556 INFO L226 Difference]: Without dead ends: 19 [2023-11-21 22:05:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:05:51,557 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:05:51,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:05:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-21 22:05:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-11-21 22:05:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-21 22:05:51,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2023-11-21 22:05:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:05:51,566 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-21 22:05:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-21 22:05:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 22:05:51,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:05:51,568 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:51,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:05:51,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:05:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 445514638, now seen corresponding path program 3 times [2023-11-21 22:05:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078604809] [2023-11-21 22:05:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:51,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:05:51,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493761908] [2023-11-21 22:05:51,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:05:51,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:05:51,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:51,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:05:51,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:05:51,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 22:05:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-21 22:05:51,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:05:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:05:52,018 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:05:52,018 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:05:52,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 22:05:52,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:05:52,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:05:52,226 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-11-21 22:05:52,230 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:05:52,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:05:52 BoogieIcfgContainer [2023-11-21 22:05:52,264 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:05:52,265 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:05:52,265 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:05:52,265 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:05:52,266 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:46" (3/4) ... [2023-11-21 22:05:52,267 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-21 22:05:52,320 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192f6238-a29e-454a-82af-2a9d684415c7/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 22:05:52,320 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:05:52,321 INFO L158 Benchmark]: Toolchain (without parser) took 6666.61ms. Allocated memory is still 167.8MB. Free memory was 125.0MB in the beginning and 59.0MB in the end (delta: 66.0MB). Peak memory consumption was 67.6MB. Max. memory is 16.1GB. [2023-11-21 22:05:52,322 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 121.6MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:05:52,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.01ms. Allocated memory is still 167.8MB. Free memory was 124.7MB in the beginning and 113.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 22:05:52,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.90ms. Allocated memory is still 167.8MB. Free memory was 113.7MB in the beginning and 112.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:05:52,323 INFO L158 Benchmark]: Boogie Preprocessor took 50.38ms. Allocated memory is still 167.8MB. Free memory was 112.0MB in the beginning and 110.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:05:52,323 INFO L158 Benchmark]: RCFGBuilder took 483.86ms. Allocated memory is still 167.8MB. Free memory was 110.0MB in the beginning and 94.6MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-21 22:05:52,324 INFO L158 Benchmark]: TraceAbstraction took 5613.02ms. Allocated memory is still 167.8MB. Free memory was 93.9MB in the beginning and 61.1MB in the end (delta: 32.8MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. [2023-11-21 22:05:52,324 INFO L158 Benchmark]: Witness Printer took 55.79ms. Allocated memory is still 167.8MB. Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:05:52,327 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 121.6MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 395.01ms. Allocated memory is still 167.8MB. Free memory was 124.7MB in the beginning and 113.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.90ms. Allocated memory is still 167.8MB. Free memory was 113.7MB in the beginning and 112.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 50.38ms. Allocated memory is still 167.8MB. Free memory was 112.0MB in the beginning and 110.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 483.86ms. Allocated memory is still 167.8MB. Free memory was 110.0MB in the beginning and 94.6MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5613.02ms. Allocated memory is still 167.8MB. Free memory was 93.9MB in the beginning and 61.1MB in the end (delta: 32.8MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. * Witness Printer took 55.79ms. Allocated memory is still 167.8MB. Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 VAL [N=3, a={-1:0}, b={-2:0}, i=1] [L33] COND TRUE i