./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:58:26,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:58:26,730 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:58:26,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:58:26,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:58:26,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:58:26,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:58:26,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:58:26,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:58:26,784 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:58:26,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:58:26,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:58:26,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:58:26,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:58:26,787 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:58:26,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:58:26,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:58:26,789 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:58:26,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:58:26,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:58:26,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:58:26,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:58:26,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:58:26,792 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:58:26,792 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:58:26,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:58:26,793 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:58:26,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:58:26,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:58:26,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:58:26,808 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:58:26,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:58:26,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:58:26,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:58:26,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:58:26,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:58:26,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:58:26,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:58:26,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:58:26,812 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:58:26,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:58:26,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:58:26,813 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_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 [2023-11-21 20:58:27,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:58:27,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:58:27,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:58:27,256 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:58:27,257 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:58:27,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2023-11-21 20:58:30,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:58:30,607 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:58:30,609 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2023-11-21 20:58:30,620 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/data/7ef598f33/4d8adff24c144360a86c46a8bf7302be/FLAGa649ea478 [2023-11-21 20:58:30,639 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/data/7ef598f33/4d8adff24c144360a86c46a8bf7302be [2023-11-21 20:58:30,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:58:30,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:58:30,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:58:30,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:58:30,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:58:30,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:58:30" (1/1) ... [2023-11-21 20:58:30,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc2a23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:30, skipping insertion in model container [2023-11-21 20:58:30,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:58:30" (1/1) ... [2023-11-21 20:58:30,694 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:58:30,918 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_63f45b18-1847-4d4d-a1de-608ef5ca547d/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2023-11-21 20:58:30,955 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_63f45b18-1847-4d4d-a1de-608ef5ca547d/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2023-11-21 20:58:30,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:58:30,974 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:58:30,988 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_63f45b18-1847-4d4d-a1de-608ef5ca547d/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2023-11-21 20:58:31,000 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_63f45b18-1847-4d4d-a1de-608ef5ca547d/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2023-11-21 20:58:31,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:58:31,017 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:58:31,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31 WrapperNode [2023-11-21 20:58:31,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:58:31,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:58:31,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:58:31,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:58:31,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,036 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,065 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-21 20:58:31,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:58:31,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:58:31,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:58:31,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:58:31,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,095 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,147 INFO L187 HeapSplitter]: Split 10 memory accesses to 2 slices as follows [2, 8] [2023-11-21 20:58:31,147 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:58:31,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:58:31,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:58:31,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:58:31,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (1/1) ... [2023-11-21 20:58:31,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:58:31,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:31,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:58:31,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:58:31,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:58:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-21 20:58:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-21 20:58:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-21 20:58:31,254 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-21 20:58:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:58:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 20:58:31,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:58:31,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:58:31,330 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:58:31,333 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:58:31,508 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:58:31,616 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:58:31,616 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 20:58:31,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:31 BoogieIcfgContainer [2023-11-21 20:58:31,619 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:58:31,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:58:31,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:58:31,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:58:31,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:58:30" (1/3) ... [2023-11-21 20:58:31,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b3bb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:31, skipping insertion in model container [2023-11-21 20:58:31,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:31" (2/3) ... [2023-11-21 20:58:31,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b3bb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:31, skipping insertion in model container [2023-11-21 20:58:31,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:31" (3/3) ... [2023-11-21 20:58:31,633 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_8.i [2023-11-21 20:58:31,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:58:31,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 20:58:31,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:58:31,716 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;@1250daa8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:58:31,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 20:58:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 20:58:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 20:58:31,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:31,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 20:58:31,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:31,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -584909265, now seen corresponding path program 1 times [2023-11-21 20:58:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:31,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763237185] [2023-11-21 20:58:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763237185] [2023-11-21 20:58:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763237185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:32,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:32,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:32,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089335959] [2023-11-21 20:58:32,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:32,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:32,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:32,320 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:32,436 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-21 20:58:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:58:32,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2023-11-21 20:58:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:32,447 INFO L225 Difference]: With dead ends: 37 [2023-11-21 20:58:32,447 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 20:58:32,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:32,454 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:32,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 20:58:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-21 20:58:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 20:58:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-21 20:58:32,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2023-11-21 20:58:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:32,503 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-21 20:58:32,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-21 20:58:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 20:58:32,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:32,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:58:32,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:32,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1018725074, now seen corresponding path program 1 times [2023-11-21 20:58:32,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:32,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663454697] [2023-11-21 20:58:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:32,547 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:58:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962762421] [2023-11-21 20:58:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:32,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:32,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:32,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:58:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:32,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-21 20:58:32,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:34,188 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse8 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse1 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (.cse6 (<= 128 .cse8)) (.cse3 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse4 (+ .cse8 (- 256))) (.cse5 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (<= .cse8 127))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse0) (and .cse1 (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (let ((.cse2 (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|))) (and (not (= .cse2 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (= (mod (+ .cse2 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) .cse3) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0))) .cse5)) .cse6) (and .cse7 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse8 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0)))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0))) .cse0) (and .cse1 (or (and .cse6 (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (let ((.cse9 (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|))) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (not (= .cse9 0)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod (+ .cse9 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_22|)) 256) .cse3) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse5))) (and .cse7 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse8 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256)) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))))))))) is different from true [2023-11-21 20:58:36,842 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse3 (<= .cse4 127)) (.cse2 (+ .cse4 (- 256))) (.cse1 (<= 128 .cse4)) (.cse0 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (.cse5 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) (or (and .cse0 (or (and .cse1 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod .cse2 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))) (and .cse3 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))))) (and (or (and .cse3 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod .cse2 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0))) .cse1)) .cse0) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse5) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0))) .cse5)))) is different from true [2023-11-21 20:58:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-21 20:58:37,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:38,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:38,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663454697] [2023-11-21 20:58:38,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 20:58:38,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962762421] [2023-11-21 20:58:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962762421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:38,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:38,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-21 20:58:38,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258459049] [2023-11-21 20:58:38,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:38,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 20:58:38,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:38,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 20:58:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=42, Unknown=2, NotChecked=26, Total=90 [2023-11-21 20:58:38,951 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:41,928 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_ULTIMATE.start_main1_~x~0#1| 1)) (.cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse1 (+ |c_ULTIMATE.start_main1_~x~0#1| 1))) (and (or (not .cse0) (< |c_ULTIMATE.start_gcd_test_~a#1| .cse1) .cse2) (or (< |c_ULTIMATE.start_gcd_test_~b#1| .cse1) .cse2 (let ((.cse3 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse4 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1))) (and (or (not (= (mod .cse3 256) 0)) (and (<= .cse4 0) (not (= .cse3 0)))) (or (not (= (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 0)) (< 0 .cse4))))) (let ((.cse12 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse5 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse6 (<= .cse1 0)) (.cse10 (<= 128 .cse12)) (.cse8 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse9 (+ .cse12 (- 256))) (.cse11 (<= .cse12 127))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse5) (and .cse6 (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (let ((.cse7 (mod .cse9 |v_ULTIMATE.start_gcd_test_~b#1_22|))) (and (not (= .cse7 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (= (mod (+ .cse7 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) .cse8) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod .cse9 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0))) .cse0)) .cse10) (and .cse11 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0)))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0))) .cse5) (and .cse6 (or (and .cse10 (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (let ((.cse13 (mod .cse9 |v_ULTIMATE.start_gcd_test_~b#1_22|))) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (not (= .cse13 0)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod (+ .cse13 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_22|)) 256) .cse8) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod .cse9 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse0))) (and .cse11 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256)) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))))))))))) is different from true [2023-11-21 20:58:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:43,418 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-21 20:58:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:43,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 20:58:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:43,420 INFO L225 Difference]: With dead ends: 28 [2023-11-21 20:58:43,420 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 20:58:43,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=30, Invalid=68, Unknown=4, NotChecked=54, Total=156 [2023-11-21 20:58:43,422 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:43,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2023-11-21 20:58:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 20:58:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 20:58:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 20:58:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-21 20:58:43,436 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 7 [2023-11-21 20:58:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:43,436 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-21 20:58:43,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-21 20:58:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 20:58:43,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:43,440 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:43,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:43,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:43,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1867278002, now seen corresponding path program 2 times [2023-11-21 20:58:43,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:43,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047946259] [2023-11-21 20:58:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:43,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:43,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 20:58:43,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649447731] [2023-11-21 20:58:43,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:58:43,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:43,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:43,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f45b18-1847-4d4d-a1de-608ef5ca547d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:58:43,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:58:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:43,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 20:58:43,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:59:33,840 WARN L293 SmtUtils]: Spent 28.15s on a formula simplification. DAG size of input: 196 DAG size of output: 133 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)