./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_3_7.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_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/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_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/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_44f1005a-d35b-439c-9c82-454d584e02f2/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 f5a5fcfdef398824c80e5dd00ccb13245b1aba31a53b04be2e0e92d8a739e53d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:07:28,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:07:28,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:07:28,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:07:28,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:07:28,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:07:28,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:07:28,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:07:28,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:07:28,371 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:07:28,371 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:07:28,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:07:28,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:07:28,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:07:28,375 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:07:28,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:07:28,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:07:28,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:07:28,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:07:28,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:07:28,378 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:07:28,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:07:28,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:07:28,379 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:07:28,380 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:07:28,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:07:28,381 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:07:28,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:07:28,382 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:07:28,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:07:28,384 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:07:28,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:28,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:07:28,385 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:07:28,385 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:07:28,385 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:07:28,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:07:28,386 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:07:28,386 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:07:28,386 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:07:28,386 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:07:28,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:07:28,387 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_44f1005a-d35b-439c-9c82-454d584e02f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5a5fcfdef398824c80e5dd00ccb13245b1aba31a53b04be2e0e92d8a739e53d [2023-11-21 22:07:28,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:07:28,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:07:28,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:07:28,695 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:07:28,696 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:07:28,697 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/gcd_3+newton_3_7.i [2023-11-21 22:07:31,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:07:32,124 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:07:32,126 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/sv-benchmarks/c/combinations/gcd_3+newton_3_7.i [2023-11-21 22:07:32,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/data/c11bd7a92/81474d3bd46a47eda7b36c5b96c879f0/FLAG0bfe50639 [2023-11-21 22:07:32,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/data/c11bd7a92/81474d3bd46a47eda7b36c5b96c879f0 [2023-11-21 22:07:32,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:07:32,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:07:32,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:32,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:07:32,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:07:32,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56932990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32, skipping insertion in model container [2023-11-21 22:07:32,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,207 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:07:32,410 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_44f1005a-d35b-439c-9c82-454d584e02f2/sv-benchmarks/c/combinations/gcd_3+newton_3_7.i[1226,1239] [2023-11-21 22:07:32,437 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_44f1005a-d35b-439c-9c82-454d584e02f2/sv-benchmarks/c/combinations/gcd_3+newton_3_7.i[2862,2875] [2023-11-21 22:07:32,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:32,450 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:07:32,464 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_44f1005a-d35b-439c-9c82-454d584e02f2/sv-benchmarks/c/combinations/gcd_3+newton_3_7.i[1226,1239] [2023-11-21 22:07:32,476 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_44f1005a-d35b-439c-9c82-454d584e02f2/sv-benchmarks/c/combinations/gcd_3+newton_3_7.i[2862,2875] [2023-11-21 22:07:32,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:32,492 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:07:32,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32 WrapperNode [2023-11-21 22:07:32,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:32,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:32,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:07:32,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:07:32,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,536 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-11-21 22:07:32,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:32,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:07:32,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:07:32,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:07:32,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,556 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,567 INFO L187 HeapSplitter]: Split 10 memory accesses to 2 slices as follows [2, 8] [2023-11-21 22:07:32,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,568 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:07:32,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:07:32,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:07:32,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:07:32,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (1/1) ... [2023-11-21 22:07:32,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:32,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:32,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:07:32,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:07:32,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:07:32,687 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-21 22:07:32,687 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-21 22:07:32,687 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-21 22:07:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-21 22:07:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:07:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:07:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:07:32,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:07:32,786 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:07:32,790 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:07:33,101 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:07:33,247 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:07:33,247 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:07:33,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:33 BoogieIcfgContainer [2023-11-21 22:07:33,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:07:33,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:07:33,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:07:33,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:07:33,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:07:32" (1/3) ... [2023-11-21 22:07:33,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac5dc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:33, skipping insertion in model container [2023-11-21 22:07:33,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:32" (2/3) ... [2023-11-21 22:07:33,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac5dc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:33, skipping insertion in model container [2023-11-21 22:07:33,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:33" (3/3) ... [2023-11-21 22:07:33,278 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_7.i [2023-11-21 22:07:33,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:07:33,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:07:33,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:07:33,353 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;@149145d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:07:33,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:07:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-11-21 22:07:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:07:33,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:33,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:07:33,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:33,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash -377832024, now seen corresponding path program 1 times [2023-11-21 22:07:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:33,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609932685] [2023-11-21 22:07:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:33,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609932685] [2023-11-21 22:07:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609932685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:33,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:33,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:07:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346331143] [2023-11-21 22:07:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:33,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:33,919 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 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 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 22:07:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:34,022 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-11-21 22:07:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:07:34,025 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 22:07:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:34,033 INFO L225 Difference]: With dead ends: 40 [2023-11-21 22:07:34,033 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 22:07:34,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:07:34,041 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 83 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 22:07:34,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 83 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 22:07:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-21 22:07:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2023-11-21 22:07:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-21 22:07:34,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-11-21 22:07:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:34,090 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-21 22:07:34,090 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 22:07:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-21 22:07:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:07:34,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:34,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:34,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:07:34,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:34,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1099445991, now seen corresponding path program 1 times [2023-11-21 22:07:34,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:34,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108995147] [2023-11-21 22:07:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:34,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:34,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366472480] [2023-11-21 22:07:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:34,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:34,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:34,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:07:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:34,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-21 22:07:34,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:36,335 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 22:07:36,691 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 22:07:36,805 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 22:07:36,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:38,595 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 22:07:38,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108995147] [2023-11-21 22:07:38,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366472480] [2023-11-21 22:07:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366472480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:38,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:07:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-21 22:07:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342579538] [2023-11-21 22:07:38,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:38,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:07:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:07:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=42, Unknown=2, NotChecked=26, Total=90 [2023-11-21 22:07:38,608 INFO L87 Difference]: Start difference. First operand 24 states and 28 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 22:07:41,090 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 22:07:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:44,997 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-11-21 22:07:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:07:44,998 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 22:07:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:44,999 INFO L225 Difference]: With dead ends: 31 [2023-11-21 22:07:44,999 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 22:07:45,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=30, Invalid=67, Unknown=5, NotChecked=54, Total=156 [2023-11-21 22:07:45,001 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:45,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2023-11-21 22:07:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 22:07:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-21 22:07:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 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) [2023-11-21 22:07:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-21 22:07:45,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2023-11-21 22:07:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:45,014 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-21 22:07:45,014 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 22:07:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-21 22:07:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:07:45,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:45,015 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:45,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:07:45,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:45,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:45,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1975388935, now seen corresponding path program 2 times [2023-11-21 22:07:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:45,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470483856] [2023-11-21 22:07:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:45,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:45,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:45,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277433903] [2023-11-21 22:07:45,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:07:45,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:45,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:45,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f1005a-d35b-439c-9c82-454d584e02f2/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:07:45,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:07:45,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:07:45,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:07:45,395 INFO L285 TraceCheckSpWp]: Computing forward predicates...