./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:19,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:19,299 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:46:19,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:19,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:19,356 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:19,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:19,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:19,360 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:19,362 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:19,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:19,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:19,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:19,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:19,366 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:19,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:19,368 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:46:19,368 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:19,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:19,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:19,370 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:19,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:46:19,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:19,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:46:19,373 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:19,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:46:19,374 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:19,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:19,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:19,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:19,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:19,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:19,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:19,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:19,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:46:19,379 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:19,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:19,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:19,380 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:19,381 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:46:19,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:19,382 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:19,382 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 [2023-11-26 10:46:19,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:19,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:19,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:19,790 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:19,791 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:19,792 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2023-11-26 10:46:23,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:23,311 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:23,311 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2023-11-26 10:46:23,322 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data/194357a3e/75651bb585c34c31b79356e2defa84c6/FLAG2ea8d6979 [2023-11-26 10:46:23,341 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data/194357a3e/75651bb585c34c31b79356e2defa84c6 [2023-11-26 10:46:23,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:23,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:23,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:23,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:23,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:23,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4283dfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23, skipping insertion in model container [2023-11-26 10:46:23,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,391 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:23,572 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2023-11-26 10:46:23,603 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2023-11-26 10:46:23,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:23,638 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:23,672 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2023-11-26 10:46:23,686 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2023-11-26 10:46:23,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:23,707 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:23,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23 WrapperNode [2023-11-26 10:46:23,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:23,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:23,709 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:23,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:23,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,771 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 81 [2023-11-26 10:46:23,772 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:23,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:23,773 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:23,773 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:23,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,802 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-11-26 10:46:23,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:23,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:23,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:23,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:23,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (1/1) ... [2023-11-26 10:46:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:23,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:23,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-26 10:46:23,927 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-26 10:46:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-26 10:46:23,929 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-26 10:46:23,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:46:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:46:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:23,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:46:23,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:46:24,048 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:24,053 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:24,317 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:24,352 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:24,352 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:46:24,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:24 BoogieIcfgContainer [2023-11-26 10:46:24,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:24,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:24,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:24,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:24,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:23" (1/3) ... [2023-11-26 10:46:24,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6598e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:24, skipping insertion in model container [2023-11-26 10:46:24,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:23" (2/3) ... [2023-11-26 10:46:24,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6598e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:24, skipping insertion in model container [2023-11-26 10:46:24,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:24" (3/3) ... [2023-11-26 10:46:24,365 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_2.i [2023-11-26 10:46:24,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:24,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:46:24,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:24,462 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;@73d9f673, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:24,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 10:46:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.5) internal successors, (36), 26 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 10:46:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:46:24,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:24,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:24,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:24,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 531794030, now seen corresponding path program 1 times [2023-11-26 10:46:24,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:24,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769682642] [2023-11-26 10:46:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:24,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769682642] [2023-11-26 10:46:24,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:46:24,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343834687] [2023-11-26 10:46:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:24,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:24,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:24,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:24,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:24,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:24,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343834687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:24,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:24,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:24,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501435229] [2023-11-26 10:46:24,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:24,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:24,893 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.5) internal successors, (36), 26 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:24,966 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2023-11-26 10:46:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:46:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:24,979 INFO L225 Difference]: With dead ends: 72 [2023-11-26 10:46:24,979 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 10:46:24,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:24,988 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:24,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 10:46:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-11-26 10:46:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:46:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-26 10:46:25,038 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2023-11-26 10:46:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:25,039 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-26 10:46:25,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,039 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-26 10:46:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:46:25,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:25,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:25,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:46:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:46:25,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:25,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1988165904, now seen corresponding path program 1 times [2023-11-26 10:46:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869015212] [2023-11-26 10:46:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:25,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869015212] [2023-11-26 10:46:25,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:46:25,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457747052] [2023-11-26 10:46:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:25,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:25,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:25,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:25,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:25,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:25,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:25,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457747052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:25,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:25,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499605392] [2023-11-26 10:46:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:25,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:25,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:25,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:25,423 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:25,460 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2023-11-26 10:46:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:46:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:25,463 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:46:25,463 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 10:46:25,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:25,466 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:25,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 10:46:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-11-26 10:46:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:46:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-26 10:46:25,478 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 10 [2023-11-26 10:46:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:25,478 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-26 10:46:25,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-26 10:46:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 10:46:25,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:25,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:25,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:25,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:25,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash -466694725, now seen corresponding path program 1 times [2023-11-26 10:46:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009994598] [2023-11-26 10:46:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:25,714 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:25,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801795579] [2023-11-26 10:46:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:25,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:25,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:25,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:25,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:46:25,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:25,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:25,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009994598] [2023-11-26 10:46:25,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801795579] [2023-11-26 10:46:25,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801795579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929913318] [2023-11-26 10:46:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:25,893 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:25,931 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2023-11-26 10:46:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 10:46:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:25,933 INFO L225 Difference]: With dead ends: 50 [2023-11-26 10:46:25,933 INFO L226 Difference]: Without dead ends: 37 [2023-11-26 10:46:25,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:25,936 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:25,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-26 10:46:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-26 10:46:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:46:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-26 10:46:25,964 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 14 [2023-11-26 10:46:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:25,965 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-26 10:46:25,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-26 10:46:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:46:25,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:25,967 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:25,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:26,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:26,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1903157512, now seen corresponding path program 1 times [2023-11-26 10:46:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:26,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541996592] [2023-11-26 10:46:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:26,231 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541767942] [2023-11-26 10:46:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:26,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:26,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:46:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:26,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:46:26,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:26,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:26,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541996592] [2023-11-26 10:46:26,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541767942] [2023-11-26 10:46:26,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541767942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:26,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:26,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-26 10:46:26,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776912756] [2023-11-26 10:46:26,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:26,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:46:26,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:26,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:46:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:46:26,593 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:26,727 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-11-26 10:46:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:46:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:26,734 INFO L225 Difference]: With dead ends: 54 [2023-11-26 10:46:26,735 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 10:46:26,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:26,740 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:26,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 130 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 10:46:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-26 10:46:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:46:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-26 10:46:26,770 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16 [2023-11-26 10:46:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:26,771 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-26 10:46:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-26 10:46:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:46:26,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:26,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:26,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:26,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:26,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1416757394, now seen corresponding path program 1 times [2023-11-26 10:46:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:26,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651431625] [2023-11-26 10:46:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:46:27,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:46:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:46:27,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:46:27,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:46:27,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-26 10:46:27,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-26 10:46:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:46:27,056 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-26 10:46:27,061 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:46:27,080 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-26 10:46:27,081 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-26 10:46:27,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated [2023-11-26 10:46:27,085 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-26 10:46:27,085 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-26 10:46:27,086 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-26 10:46:27,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:46:27 BoogieIcfgContainer [2023-11-26 10:46:27,095 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:46:27,096 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:46:27,096 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:46:27,096 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:46:27,097 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:24" (3/4) ... [2023-11-26 10:46:27,099 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-26 10:46:27,101 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:46:27,102 INFO L158 Benchmark]: Toolchain (without parser) took 3755.24ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 126.9MB in the beginning and 137.3MB in the end (delta: -10.4MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2023-11-26 10:46:27,102 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 121.6MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:46:27,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 359.56ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 128.4MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 10:46:27,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.32ms. Allocated memory is still 159.4MB. Free memory was 128.4MB in the beginning and 126.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:46:27,104 INFO L158 Benchmark]: Boogie Preprocessor took 48.63ms. Allocated memory is still 159.4MB. Free memory was 126.3MB in the beginning and 124.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:46:27,104 INFO L158 Benchmark]: RCFGBuilder took 528.52ms. Allocated memory is still 159.4MB. Free memory was 124.2MB in the beginning and 110.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 10:46:27,105 INFO L158 Benchmark]: TraceAbstraction took 2738.25ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 110.4MB in the beginning and 137.3MB in the end (delta: -26.9MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2023-11-26 10:46:27,105 INFO L158 Benchmark]: Witness Printer took 5.10ms. Allocated memory is still 192.9MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:46:27,107 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 121.6MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 359.56ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 128.4MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.32ms. Allocated memory is still 159.4MB. Free memory was 128.4MB in the beginning and 126.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.63ms. Allocated memory is still 159.4MB. Free memory was 126.3MB in the beginning and 124.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 528.52ms. Allocated memory is still 159.4MB. Free memory was 124.2MB in the beginning and 110.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2738.25ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 110.4MB in the beginning and 137.3MB in the end (delta: -26.9MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Witness Printer took 5.10ms. Allocated memory is still 192.9MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - UnprovableResult [Line: 109]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.4f && IN < 0.4f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.4f && IN < 0.4f) [L100] CALL, EXPR f(IN) VAL [\old(x)=110] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [IN=110] [L100] CALL, EXPR fp(IN) VAL [\old(x)=110] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [IN=110] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [IN=110, x=112] [L102] CALL, EXPR fp(x) VAL [\old(x)=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [IN=110, x=112] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=110] [L109] reach_error() VAL [IN=110] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 304 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 180 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 98 IncrementalHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 124 mSDtfsCounter, 98 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 167 SizeOfPredicates, 12 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 5/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-26 10:46:27,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:30,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:30,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-26 10:46:30,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:30,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:30,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:30,252 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:30,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:30,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:30,260 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:30,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:30,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:30,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:30,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:30,265 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:30,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:30,267 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:46:30,267 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:30,268 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:30,268 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:30,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:46:30,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:30,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:46:30,271 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:46:30,271 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 10:46:30,272 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 10:46:30,272 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:30,272 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:46:30,273 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:30,273 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:30,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:30,275 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:30,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:30,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:30,276 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:30,277 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:30,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:46:30,278 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 10:46:30,278 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 10:46:30,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:30,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:30,279 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:46:30,279 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:30,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:30,280 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 10:46:30,280 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 [2023-11-26 10:46:30,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:30,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:30,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:30,812 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:30,812 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:30,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2023-11-26 10:46:34,287 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:34,646 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:34,647 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2023-11-26 10:46:34,660 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data/b9fcf8ea5/5b8f6b4c1b1c489d9abcdaa926f87da6/FLAG14eb0fb0c [2023-11-26 10:46:34,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/data/b9fcf8ea5/5b8f6b4c1b1c489d9abcdaa926f87da6 [2023-11-26 10:46:34,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:34,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:34,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:34,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:34,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:34,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:34" (1/1) ... [2023-11-26 10:46:34,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b29d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:34, skipping insertion in model container [2023-11-26 10:46:34,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:34" (1/1) ... [2023-11-26 10:46:34,750 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:34,992 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2023-11-26 10:46:35,033 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2023-11-26 10:46:35,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:35,070 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:35,101 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2023-11-26 10:46:35,134 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_682ab3fc-fcfc-4bb4-9455-808032e6612f/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2023-11-26 10:46:35,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:35,157 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:35,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35 WrapperNode [2023-11-26 10:46:35,158 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:35,159 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:35,159 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:35,159 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:35,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,194 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,230 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 78 [2023-11-26 10:46:35,231 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:35,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:35,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:35,232 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:35,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,260 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,304 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-11-26 10:46:35,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,345 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:35,346 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:35,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:35,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:35,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:35,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:35,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 10:46:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 10:46:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-26 10:46:35,437 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-26 10:46:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-26 10:46:35,437 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-26 10:46:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:35,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:46:35,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:46:35,531 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:35,534 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:48,842 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:48,924 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:48,924 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:46:48,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:48 BoogieIcfgContainer [2023-11-26 10:46:48,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:48,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:48,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:48,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:48,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:34" (1/3) ... [2023-11-26 10:46:48,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ec58df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:48, skipping insertion in model container [2023-11-26 10:46:48,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35" (2/3) ... [2023-11-26 10:46:48,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ec58df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:48, skipping insertion in model container [2023-11-26 10:46:48,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:48" (3/3) ... [2023-11-26 10:46:48,946 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_2.i [2023-11-26 10:46:48,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:48,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:46:49,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:49,049 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;@ee55339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:49,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 10:46:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.5) internal successors, (36), 26 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 10:46:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:46:49,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:49,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:49,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:49,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:49,073 INFO L85 PathProgramCache]: Analyzing trace with hash 531794030, now seen corresponding path program 1 times [2023-11-26 10:46:49,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:49,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455377131] [2023-11-26 10:46:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:49,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:49,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:49,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:49,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-26 10:46:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:49,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:49,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:49,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:49,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455377131] [2023-11-26 10:46:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455377131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:49,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249017160] [2023-11-26 10:46:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:49,417 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.5) internal successors, (36), 26 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:46:58,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:04,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:08,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:08,369 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2023-11-26 10:47:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:47:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:08,380 INFO L225 Difference]: With dead ends: 74 [2023-11-26 10:47:08,380 INFO L226 Difference]: Without dead ends: 37 [2023-11-26 10:47:08,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:08,387 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:08,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 18.9s Time] [2023-11-26 10:47:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-26 10:47:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-11-26 10:47:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:47:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-26 10:47:08,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2023-11-26 10:47:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:08,424 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-26 10:47:08,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-26 10:47:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:47:08,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:08,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:08,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:08,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:08,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:08,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2010454398, now seen corresponding path program 1 times [2023-11-26 10:47:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784702930] [2023-11-26 10:47:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:08,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:08,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:08,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:08,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-26 10:47:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:08,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:47:08,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:08,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:08,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784702930] [2023-11-26 10:47:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784702930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:08,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914574800] [2023-11-26 10:47:08,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:08,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:08,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:08,793 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:14,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:18,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:20,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:20,838 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-11-26 10:47:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 10:47:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:20,841 INFO L225 Difference]: With dead ends: 49 [2023-11-26 10:47:20,841 INFO L226 Difference]: Without dead ends: 35 [2023-11-26 10:47:20,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:20,843 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:20,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 2 Unknown, 0 Unchecked, 12.0s Time] [2023-11-26 10:47:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-26 10:47:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-26 10:47:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:47:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-26 10:47:20,859 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 12 [2023-11-26 10:47:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:20,859 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-26 10:47:20,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-26 10:47:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 10:47:20,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:20,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:20,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:21,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:21,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:21,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash -466694725, now seen corresponding path program 1 times [2023-11-26 10:47:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486745286] [2023-11-26 10:47:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:21,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:21,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:21,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_682ab3fc-fcfc-4bb4-9455-808032e6612f/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-26 10:47:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:21,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:47:21,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:21,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:21,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486745286] [2023-11-26 10:47:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486745286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:21,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:21,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130416225] [2023-11-26 10:47:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:21,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:21,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:21,503 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers []