./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ --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 8f745b16f6c25c5a9ff69a5e07a8fa4db5c31a6fdae6ec4e6a2aab4d04fe5214 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:33:43,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:33:43,778 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:33:43,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:33:43,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:33:43,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:33:43,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:33:43,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:33:43,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:33:43,841 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:33:43,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:33:43,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:33:43,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:33:43,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:33:43,845 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:33:43,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:33:43,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:33:43,846 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:33:43,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:33:43,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:33:43,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:33:43,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:33:43,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:33:43,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:33:43,850 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:33:43,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:33:43,851 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:33:43,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:33:43,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:33:43,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:33:43,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:33:43,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:43,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:33:43,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:33:43,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:33:43,855 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:33:43,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:33:43,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:33:43,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:33:43,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:33:43,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:33:43,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:33:43,857 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_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f745b16f6c25c5a9ff69a5e07a8fa4db5c31a6fdae6ec4e6a2aab4d04fe5214 [2023-11-23 22:33:44,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:33:44,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:33:44,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:33:44,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:33:44,244 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:33:44,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/combinations/gcd_2+newton_3_8.i [2023-11-23 22:33:47,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:33:47,833 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:33:47,835 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/sv-benchmarks/c/combinations/gcd_2+newton_3_8.i [2023-11-23 22:33:47,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/data/746d93826/7598840f6ef14e78b4c9a681fc74bce6/FLAGf54942b69 [2023-11-23 22:33:47,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/data/746d93826/7598840f6ef14e78b4c9a681fc74bce6 [2023-11-23 22:33:47,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:33:47,867 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:33:47,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:33:47,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:33:47,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:33:47,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:33:47" (1/1) ... [2023-11-23 22:33:47,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e31fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:47, skipping insertion in model container [2023-11-23 22:33:47,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:33:47" (1/1) ... [2023-11-23 22:33:47,911 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:33:48,193 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_6f28705b-1f38-4a60-a743-f177e5b3556e/sv-benchmarks/c/combinations/gcd_2+newton_3_8.i[1226,1239] [2023-11-23 22:33:48,248 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_6f28705b-1f38-4a60-a743-f177e5b3556e/sv-benchmarks/c/combinations/gcd_2+newton_3_8.i[2862,2875] [2023-11-23 22:33:48,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:33:48,272 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:33:48,297 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_6f28705b-1f38-4a60-a743-f177e5b3556e/sv-benchmarks/c/combinations/gcd_2+newton_3_8.i[1226,1239] [2023-11-23 22:33:48,320 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_6f28705b-1f38-4a60-a743-f177e5b3556e/sv-benchmarks/c/combinations/gcd_2+newton_3_8.i[2862,2875] [2023-11-23 22:33:48,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:33:48,353 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:33:48,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48 WrapperNode [2023-11-23 22:33:48,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:33:48,355 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:33:48,355 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:33:48,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:33:48,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,406 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-11-23 22:33:48,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:33:48,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:33:48,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:33:48,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:33:48,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,425 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,439 INFO L189 HeapSplitter]: Split 10 memory accesses to 2 slices as follows [2, 8] [2023-11-23 22:33:48,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:33:48,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:33:48,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:33:48,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:33:48,461 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (1/1) ... [2023-11-23 22:33:48,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:48,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:33:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:33:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:33:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-23 22:33:48,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-23 22:33:48,554 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-23 22:33:48,556 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-23 22:33:48,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:33:48,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:33:48,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:33:48,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:33:48,669 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:33:48,673 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:33:48,941 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:33:48,979 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:33:48,979 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:33:48,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:33:48 BoogieIcfgContainer [2023-11-23 22:33:48,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:33:48,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:33:48,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:33:48,988 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:33:48,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:33:47" (1/3) ... [2023-11-23 22:33:48,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b36b830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:33:48, skipping insertion in model container [2023-11-23 22:33:48,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:48" (2/3) ... [2023-11-23 22:33:48,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b36b830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:33:48, skipping insertion in model container [2023-11-23 22:33:48,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:33:48" (3/3) ... [2023-11-23 22:33:48,992 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_8.i [2023-11-23 22:33:49,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:33:49,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 22:33:49,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:33:49,096 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;@7f73b645, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:33:49,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 22:33:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 24 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:33:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:33:49,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:49,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:49,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:49,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash 210916014, now seen corresponding path program 1 times [2023-11-23 22:33:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:49,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106252501] [2023-11-23 22:33:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:49,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106252501] [2023-11-23 22:33:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106252501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:49,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:49,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:33:49,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412918900] [2023-11-23 22:33:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:49,564 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 24 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:49,718 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2023-11-23 22:33:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 22:33:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:49,731 INFO L225 Difference]: With dead ends: 67 [2023-11-23 22:33:49,731 INFO L226 Difference]: Without dead ends: 30 [2023-11-23 22:33:49,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:49,741 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:49,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:33:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-23 22:33:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-23 22:33:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:33:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-23 22:33:49,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2023-11-23 22:33:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:49,802 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-23 22:33:49,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-23 22:33:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:33:49,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:49,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:33:49,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:49,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash 268174316, now seen corresponding path program 1 times [2023-11-23 22:33:49,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466591894] [2023-11-23 22:33:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:49,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:49,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:49,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466591894] [2023-11-23 22:33:49,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466591894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:49,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:49,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:33:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275203205] [2023-11-23 22:33:49,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:49,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:33:49,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:49,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:33:49,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:33:49,922 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:49,972 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-11-23 22:33:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:33:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 22:33:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:49,974 INFO L225 Difference]: With dead ends: 34 [2023-11-23 22:33:49,975 INFO L226 Difference]: Without dead ends: 29 [2023-11-23 22:33:49,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:33:49,977 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:49,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:33:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-23 22:33:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-23 22:33:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:33:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-23 22:33:49,990 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 9 [2023-11-23 22:33:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:49,990 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-23 22:33:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-23 22:33:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 22:33:49,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:49,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:49,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:33:49,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:49,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -291101499, now seen corresponding path program 1 times [2023-11-23 22:33:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810202172] [2023-11-23 22:33:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:50,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:50,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268744302] [2023-11-23 22:33:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:50,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:50,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:50,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:50,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:33:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:50,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:33:50,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:50,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:33:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:50,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:50,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810202172] [2023-11-23 22:33:50,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:33:50,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268744302] [2023-11-23 22:33:50,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268744302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:33:50,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:33:50,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2023-11-23 22:33:50,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688649722] [2023-11-23 22:33:50,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:33:50,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:33:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:33:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:33:50,310 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:50,433 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-23 22:33:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:33:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 22:33:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:50,436 INFO L225 Difference]: With dead ends: 35 [2023-11-23 22:33:50,437 INFO L226 Difference]: Without dead ends: 30 [2023-11-23 22:33:50,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:33:50,441 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:50,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:33:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-23 22:33:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-23 22:33:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:33:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-23 22:33:50,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2023-11-23 22:33:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:50,461 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-23 22:33:50,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-23 22:33:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 22:33:50,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:50,464 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:50,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:33:50,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:50,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:50,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:50,679 INFO L85 PathProgramCache]: Analyzing trace with hash -448782580, now seen corresponding path program 2 times [2023-11-23 22:33:50,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:50,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924765553] [2023-11-23 22:33:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:50,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:50,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:33:50,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788074577] [2023-11-23 22:33:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:33:50,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:50,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:50,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28705b-1f38-4a60-a743-f177e5b3556e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:33:50,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:33:50,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:33:50,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 22:33:50,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:00,114 WARN L876 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main1_~y~0#1| 0)) (let ((.cse0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255))) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |c_ULTIMATE.start_main1_~y~0#1|))) (and (= .cse0 (mod (+ .cse1 .cse2) 256)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_18| 1) 0) (not (= .cse2 0)) (<= (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse2) 256) 127)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= 128 (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse3) 256)) (= .cse0 (mod (+ .cse1 .cse3) 256)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_18| 1) 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse4 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (<= (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 127) (= (mod .cse4 256) |c_ULTIMATE.start_gcd_test_~a#1|)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse5 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= 128 (mod (+ |c_ULTIMATE.start_main1_~y~0#1| .cse5) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (= (mod .cse5 256) |c_ULTIMATE.start_gcd_test_~a#1|)))))) (<= 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (let ((.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (let ((.cse41 (mod |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse40 (mod .cse16 256))) (let ((.cse19 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse29 (<= 128 .cse40)) (.cse23 (<= .cse41 127)) (.cse28 (<= 128 .cse41)) (.cse20 (<= .cse40 127)) (.cse21 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse22 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|)))))) (let ((.cse10 (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse38 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse39 (mod .cse38 256))) (and (<= (mod (+ .cse16 .cse38) 256) 127) (= .cse39 |c_ULTIMATE.start_gcd_test_~b#1|) (<= .cse39 127) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse38) 256)))))) (and .cse28 .cse20 .cse21 .cse22))) (.cse11 (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse37 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse36 (mod .cse37 256))) (and (= .cse36 |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse37) 256) 127) (<= .cse36 127) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 (mod (+ .cse16 .cse37) 256)))))) (and .cse21 .cse29 .cse22 .cse23))) (.cse13 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse34 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse35 (mod .cse34 256))) (and (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse34) 256) 127) (= .cse35 .cse19) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 .cse35) (<= 128 (mod (+ .cse16 .cse34) 256))))))) (.cse14 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse32 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse33 (mod .cse32 256))) (and (<= (mod (+ .cse16 .cse32) 256) 127) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse32) 256) 127) (= .cse33 .cse19) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 .cse33)))))) (.cse15 (or (and .cse28 .cse21 .cse29 .cse22) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse31 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse30 (mod .cse31 256))) (and (= .cse30 |c_ULTIMATE.start_gcd_test_~b#1|) (<= .cse30 127) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse31) 256)) (<= 128 (mod (+ .cse16 .cse31) 256)))))))) (.cse12 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse27 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse26 (mod .cse27 256))) (and (= .cse26 .cse19) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse27) 256)) (<= 128 .cse26) (<= 128 (mod (+ .cse16 .cse27) 256))))))) (.cse6 (or (and .cse20 .cse21 .cse22 .cse23) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse24 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse25 (mod .cse24 256))) (and (<= (mod (+ .cse16 .cse24) 256) 127) (= .cse25 |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse24) 256) 127) (<= .cse25 127) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|))))))) (.cse8 (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)) (.cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (let ((.cse17 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse18 (mod .cse17 256))) (and (<= (mod (+ .cse16 .cse17) 256) 127) (= .cse18 .cse19) (<= |c_ULTIMATE.start_main1_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_19|) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse17) 256)) (<= 128 .cse18))))))) (or (and .cse6 .cse7) (and .cse8 .cse9) (and .cse10 .cse7) (and .cse11 .cse7) (and .cse10 .cse8) (and .cse12 .cse7) (and .cse13 .cse7) (and .cse11 .cse8) (and .cse13 .cse8) (and .cse14 .cse8) (and .cse7 .cse15) (and .cse14 .cse7) (and .cse8 .cse15) (and .cse12 .cse8) (and .cse6 .cse8) (and .cse7 .cse9)))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from true [2023-11-23 22:34:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-23 22:34:09,840 INFO L327 TraceCheckSpWp]: Computing backward predicates...