./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu --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 d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:06,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:06,157 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:36:06,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:06,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:06,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:06,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:06,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:06,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:06,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:06,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:06,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:06,225 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:06,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:06,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:36:06,228 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:06,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:06,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:06,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:06,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:36:06,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:06,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:36:06,231 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:06,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:36:06,232 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:06,233 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:06,233 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:06,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:06,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:06,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:06,236 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:06,236 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:36:06,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:06,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:06,237 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:06,238 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:36:06,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:06,238 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:06,238 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:06,238 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2023-11-19 07:36:06,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:06,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:06,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:06,621 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:06,621 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:06,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2023-11-19 07:36:09,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:09,956 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:09,957 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2023-11-19 07:36:09,966 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data/ab20704c1/ed93a75cef2a483b8097b28f6838997a/FLAG024041090 [2023-11-19 07:36:09,985 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data/ab20704c1/ed93a75cef2a483b8097b28f6838997a [2023-11-19 07:36:09,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:09,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:09,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:09,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:10,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:10,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:09" (1/1) ... [2023-11-19 07:36:10,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c9b229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10, skipping insertion in model container [2023-11-19 07:36:10,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:09" (1/1) ... [2023-11-19 07:36:10,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:10,251 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2023-11-19 07:36:10,278 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2023-11-19 07:36:10,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:10,291 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:10,308 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2023-11-19 07:36:10,321 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2023-11-19 07:36:10,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:10,337 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:10,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10 WrapperNode [2023-11-19 07:36:10,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:10,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:10,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:10,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:10,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,379 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2023-11-19 07:36:10,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:10,381 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:10,381 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:10,381 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:10,390 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,408 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:10,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:10,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:10,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:10,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (1/1) ... [2023-11-19 07:36:10,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:10,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:10,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:10,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-19 07:36:10,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-19 07:36:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-19 07:36:10,497 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-19 07:36:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:10,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:36:10,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:36:10,595 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:10,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:10,784 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:10,803 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:10,804 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:36:10,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:10 BoogieIcfgContainer [2023-11-19 07:36:10,808 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:10,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:10,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:10,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:10,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:09" (1/3) ... [2023-11-19 07:36:10,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43404ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:10, skipping insertion in model container [2023-11-19 07:36:10,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:10" (2/3) ... [2023-11-19 07:36:10,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43404ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:10, skipping insertion in model container [2023-11-19 07:36:10,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:10" (3/3) ... [2023-11-19 07:36:10,820 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2023-11-19 07:36:10,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:10,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:36:10,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:10,915 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;@76255986, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:10,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 07:36:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:36:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:36:10,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:10,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:10,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:10,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2023-11-19 07:36:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452765932] [2023-11-19 07:36:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:11,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:11,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452765932] [2023-11-19 07:36:11,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:36:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630943113] [2023-11-19 07:36:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:11,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:11,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:11,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:36:11,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:11,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630943113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:11,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:11,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85370527] [2023-11-19 07:36:11,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:11,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:11,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:11,340 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:11,394 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2023-11-19 07:36:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 07:36:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:11,405 INFO L225 Difference]: With dead ends: 89 [2023-11-19 07:36:11,406 INFO L226 Difference]: Without dead ends: 42 [2023-11-19 07:36:11,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:11,413 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:11,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-19 07:36:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-11-19 07:36:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-11-19 07:36:11,466 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2023-11-19 07:36:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:11,467 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-11-19 07:36:11,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-11-19 07:36:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:36:11,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:11,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:11,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:36:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:36:11,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:11,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2023-11-19 07:36:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105114623] [2023-11-19 07:36:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105114623] [2023-11-19 07:36:11,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:36:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829203756] [2023-11-19 07:36:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:11,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:11,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:11,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:11,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:11,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:36:11,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:11,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829203756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:11,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:11,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61767630] [2023-11-19 07:36:11,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:11,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:11,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:11,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:11,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:11,912 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:11,971 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-11-19 07:36:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:11,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 07:36:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:11,976 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:36:11,978 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:36:11,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:11,981 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:11,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:36:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-19 07:36:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-19 07:36:12,010 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2023-11-19 07:36:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:12,011 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-19 07:36:12,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-19 07:36:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:36:12,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:12,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:12,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:12,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:12,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:12,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2023-11-19 07:36:12,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209197434] [2023-11-19 07:36:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:12,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:12,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263240100] [2023-11-19 07:36:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:12,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:12,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:12,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:12,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:36:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:12,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:36:12,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:12,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:12,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209197434] [2023-11-19 07:36:12,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263240100] [2023-11-19 07:36:12,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263240100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:12,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:12,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:12,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708062059] [2023-11-19 07:36:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:12,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:12,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:12,462 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:12,493 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-11-19 07:36:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 07:36:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:12,495 INFO L225 Difference]: With dead ends: 56 [2023-11-19 07:36:12,496 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 07:36:12,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:12,498 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:12,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 07:36:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-19 07:36:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-19 07:36:12,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2023-11-19 07:36:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:12,511 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-19 07:36:12,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-19 07:36:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:36:12,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:12,513 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:12,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:12,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:12,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:12,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2023-11-19 07:36:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:12,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553838715] [2023-11-19 07:36:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:12,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:12,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128180169] [2023-11-19 07:36:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:12,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:12,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:12,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:36:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:12,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:36:12,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:12,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553838715] [2023-11-19 07:36:12,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:12,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128180169] [2023-11-19 07:36:12,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128180169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:12,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:12,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 07:36:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120599965] [2023-11-19 07:36:12,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:12,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:12,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:12,945 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:12,998 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-11-19 07:36:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 07:36:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:13,000 INFO L225 Difference]: With dead ends: 60 [2023-11-19 07:36:13,001 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:36:13,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:36:13,002 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:13,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 149 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:36:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:36:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-19 07:36:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-11-19 07:36:13,013 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2023-11-19 07:36:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:13,013 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-11-19 07:36:13,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-11-19 07:36:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:36:13,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:13,015 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:13,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:13,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:13,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2023-11-19 07:36:13,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:13,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683439430] [2023-11-19 07:36:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:13,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515073489] [2023-11-19 07:36:13,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:13,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:13,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:13,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:13,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:36:13,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:13,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:13,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:36:13,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:13,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:13,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683439430] [2023-11-19 07:36:13,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:13,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515073489] [2023-11-19 07:36:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515073489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:13,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:13,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:36:13,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785381166] [2023-11-19 07:36:13,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:13,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:36:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:13,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:36:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:36:13,521 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:13,626 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2023-11-19 07:36:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:36:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 07:36:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:13,627 INFO L225 Difference]: With dead ends: 68 [2023-11-19 07:36:13,628 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 07:36:13,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:36:13,629 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:13,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 258 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 07:36:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-19 07:36:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-11-19 07:36:13,640 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2023-11-19 07:36:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:13,640 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-11-19 07:36:13,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-11-19 07:36:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:36:13,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:13,642 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:13,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:13,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:13,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:13,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2023-11-19 07:36:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308770757] [2023-11-19 07:36:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:13,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505840195] [2023-11-19 07:36:13,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:36:13,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:13,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:13,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:36:13,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:36:13,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:13,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:36:13,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:36:14,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:36:14,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308770757] [2023-11-19 07:36:14,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:14,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505840195] [2023-11-19 07:36:14,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505840195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:14,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:14,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-19 07:36:14,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037824855] [2023-11-19 07:36:14,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:14,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:36:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:36:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:36:14,645 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:15,481 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2023-11-19 07:36:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:36:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:36:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:15,483 INFO L225 Difference]: With dead ends: 78 [2023-11-19 07:36:15,483 INFO L226 Difference]: Without dead ends: 75 [2023-11-19 07:36:15,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:36:15,485 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:15,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 446 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:36:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-19 07:36:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2023-11-19 07:36:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:36:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-11-19 07:36:15,502 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2023-11-19 07:36:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:15,502 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-11-19 07:36:15,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-11-19 07:36:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:36:15,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:15,504 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:15,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:36:15,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:15,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2023-11-19 07:36:15,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:15,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381773361] [2023-11-19 07:36:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:15,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:15,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546974854] [2023-11-19 07:36:15,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:36:15,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:15,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:15,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:15,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:36:15,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:36:15,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:15,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:36:15,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:15,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:16,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381773361] [2023-11-19 07:36:16,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:16,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546974854] [2023-11-19 07:36:16,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546974854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:16,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-19 07:36:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975576883] [2023-11-19 07:36:16,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:36:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:36:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:36:16,164 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:16,343 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2023-11-19 07:36:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:36:16,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-19 07:36:16,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:16,346 INFO L225 Difference]: With dead ends: 94 [2023-11-19 07:36:16,347 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 07:36:16,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:36:16,349 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:16,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 326 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 07:36:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-19 07:36:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:36:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-11-19 07:36:16,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2023-11-19 07:36:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:16,362 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-11-19 07:36:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-11-19 07:36:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 07:36:16,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:16,365 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:16,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:16,583 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:16,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2023-11-19 07:36:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:16,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743917700] [2023-11-19 07:36:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:16,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:16,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:16,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778592787] [2023-11-19 07:36:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:36:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:16,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:16,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:36:16,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-19 07:36:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:16,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:36:16,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:16,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743917700] [2023-11-19 07:36:16,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778592787] [2023-11-19 07:36:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778592787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:16,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:16,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-19 07:36:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852818381] [2023-11-19 07:36:16,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:16,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:36:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:36:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:36:16,984 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:17,093 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-19 07:36:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:36:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-19 07:36:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:17,094 INFO L225 Difference]: With dead ends: 76 [2023-11-19 07:36:17,095 INFO L226 Difference]: Without dead ends: 49 [2023-11-19 07:36:17,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:36:17,099 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:17,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 345 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-19 07:36:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-19 07:36:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 07:36:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-11-19 07:36:17,123 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2023-11-19 07:36:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:17,123 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-11-19 07:36:17,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-11-19 07:36:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:36:17,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:17,129 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:17,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:17,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2023-11-19 07:36:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749784552] [2023-11-19 07:36:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:17,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:17,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905063594] [2023-11-19 07:36:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:17,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:17,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:17,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:36:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:17,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:36:17,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:36:17,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:36:18,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:18,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749784552] [2023-11-19 07:36:18,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:18,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905063594] [2023-11-19 07:36:18,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905063594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:18,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:18,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-11-19 07:36:18,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619044818] [2023-11-19 07:36:18,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:36:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:36:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:36:18,155 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:36:20,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 07:36:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:27,514 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-11-19 07:36:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:36:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-19 07:36:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:27,515 INFO L225 Difference]: With dead ends: 49 [2023-11-19 07:36:27,515 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 07:36:27,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=71, Invalid=348, Unknown=1, NotChecked=0, Total=420 [2023-11-19 07:36:27,516 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:27,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 411 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 07:36:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 07:36:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-19 07:36:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 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) [2023-11-19 07:36:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-19 07:36:27,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2023-11-19 07:36:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:27,521 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-19 07:36:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:36:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-19 07:36:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 07:36:27,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:27,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:27,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:27,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:27,735 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:27,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2023-11-19 07:36:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:27,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047029623] [2023-11-19 07:36:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:27,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:36:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:27,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:36:27,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:36:27,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-19 07:36:27,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-19 07:36:27,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:36:27,839 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2023-11-19 07:36:27,843 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:36:27,865 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-19 07:36:27,867 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated [2023-11-19 07:36:27,867 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-19 07:36:27,867 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-19 07:36:27,868 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-19 07:36:27,868 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-19 07:36:27,869 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-11-19 07:36:27,869 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated [2023-11-19 07:36:27,869 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-11-19 07:36:27,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:36:27 BoogieIcfgContainer [2023-11-19 07:36:27,883 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:36:27,883 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:36:27,883 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:36:27,884 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:36:27,884 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:10" (3/4) ... [2023-11-19 07:36:27,887 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 07:36:27,888 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:36:27,889 INFO L158 Benchmark]: Toolchain (without parser) took 17894.68ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 130.0MB in the beginning and 100.3MB in the end (delta: 29.8MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. [2023-11-19 07:36:27,889 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 159.4MB. Free memory is still 130.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:36:27,890 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.62ms. Allocated memory is still 159.4MB. Free memory was 130.0MB in the beginning and 118.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:36:27,890 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.46ms. Allocated memory is still 159.4MB. Free memory was 118.2MB in the beginning and 116.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:36:27,891 INFO L158 Benchmark]: Boogie Preprocessor took 29.89ms. Allocated memory is still 159.4MB. Free memory was 116.1MB in the beginning and 115.4MB in the end (delta: 716.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:36:27,891 INFO L158 Benchmark]: RCFGBuilder took 397.26ms. Allocated memory is still 159.4MB. Free memory was 114.7MB in the beginning and 102.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 07:36:27,892 INFO L158 Benchmark]: TraceAbstraction took 17071.37ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 101.4MB in the beginning and 100.3MB in the end (delta: 1.2MB). Peak memory consumption was 37.1MB. Max. memory is 16.1GB. [2023-11-19 07:36:27,893 INFO L158 Benchmark]: Witness Printer took 4.86ms. Allocated memory is still 192.9MB. Free memory is still 100.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:36:27,895 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 159.4MB. Free memory is still 130.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.62ms. Allocated memory is still 159.4MB. Free memory was 130.0MB in the beginning and 118.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.46ms. Allocated memory is still 159.4MB. Free memory was 118.2MB in the beginning and 116.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.89ms. Allocated memory is still 159.4MB. Free memory was 116.1MB in the beginning and 115.4MB in the end (delta: 716.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 397.26ms. Allocated memory is still 159.4MB. Free memory was 114.7MB in the beginning and 102.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 17071.37ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 101.4MB in the beginning and 100.3MB in the end (delta: 1.2MB). Peak memory consumption was 37.1MB. Max. memory is 16.1GB. * Witness Printer took 4.86ms. Allocated memory is still 192.9MB. Free memory is still 100.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=116] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR f(IN) VAL [IN=116] [L100] CALL, EXPR fp(IN) VAL [\old(x)=116] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR fp(IN) VAL [IN=116] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR f(x) VAL [IN=116, x=111] [L102] CALL, EXPR fp(x) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR fp(x) VAL [IN=116, x=111] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=114] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR f(x) VAL [IN=116, x=114] [L104] CALL, EXPR fp(x) VAL [\old(x)=114] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR fp(x) VAL [IN=116, x=114] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=116] [L109] reach_error() VAL [IN=116] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 17.0s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 70 mSDsluCounter, 2187 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1827 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 782 IncrementalHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 360 mSDtfsCounter, 782 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 234 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 1567 SizeOfPredicates, 41 NumberOfNonLiveVariables, 773 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 67/315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-19 07:36:27,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu --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 d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:30,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:31,102 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-19 07:36:31,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:31,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:31,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:31,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:31,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:31,163 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:31,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:31,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:31,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:31,167 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:31,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:31,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:36:31,168 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:31,177 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:31,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:31,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:36:31,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:31,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:36:31,180 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:36:31,180 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 07:36:31,181 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 07:36:31,181 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:31,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:36:31,182 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:31,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:31,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:31,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:31,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:31,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:31,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:31,186 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:36:31,187 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-19 07:36:31,187 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 07:36:31,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:31,187 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:36:31,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:31,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:31,189 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-19 07:36:31,189 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:31,190 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2023-11-19 07:36:31,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:31,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:31,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:31,696 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:31,697 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:31,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2023-11-19 07:36:34,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:35,200 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:35,201 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2023-11-19 07:36:35,212 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data/3d26f5f5b/c5c6725d9a3043a0a9c303b9025429a3/FLAGc21b169cb [2023-11-19 07:36:35,232 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/data/3d26f5f5b/c5c6725d9a3043a0a9c303b9025429a3 [2023-11-19 07:36:35,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:35,237 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:35,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:35,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:35,246 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:35,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db648cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35, skipping insertion in model container [2023-11-19 07:36:35,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,278 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:35,463 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2023-11-19 07:36:35,492 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2023-11-19 07:36:35,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:35,512 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:35,530 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2023-11-19 07:36:35,543 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_2dc74cd7-5238-4b57-b1dc-5f94db096df5/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2023-11-19 07:36:35,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:35,564 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:35,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35 WrapperNode [2023-11-19 07:36:35,565 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:35,566 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:35,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:35,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:35,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,616 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2023-11-19 07:36:35,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:35,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:35,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:35,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:35,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,702 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:35,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:35,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:35,710 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:35,711 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (1/1) ... [2023-11-19 07:36:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:35,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:35,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 07:36:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-19 07:36:35,894 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-19 07:36:35,894 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-19 07:36:35,894 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-19 07:36:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:35,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:36:35,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:36:36,006 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:36,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:46,737 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:46,748 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:46,748 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:36:46,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:46 BoogieIcfgContainer [2023-11-19 07:36:46,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:46,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:46,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:46,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:46,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:35" (1/3) ... [2023-11-19 07:36:46,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16341c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:46, skipping insertion in model container [2023-11-19 07:36:46,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:35" (2/3) ... [2023-11-19 07:36:46,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16341c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:46, skipping insertion in model container [2023-11-19 07:36:46,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:46" (3/3) ... [2023-11-19 07:36:46,769 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2023-11-19 07:36:46,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:46,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:36:46,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:46,851 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;@7f4fa2b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:46,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 07:36:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:36:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:36:46,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:46,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:46,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:46,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2023-11-19 07:36:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:36:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640286468] [2023-11-19 07:36:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:36:46,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:36:46,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 07:36:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:36:47,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:47,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:36:47,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640286468] [2023-11-19 07:36:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640286468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:47,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:47,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246784385] [2023-11-19 07:36:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:36:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:47,184 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:47,313 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2023-11-19 07:36:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 07:36:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:47,330 INFO L225 Difference]: With dead ends: 91 [2023-11-19 07:36:47,330 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 07:36:47,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:47,338 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:47,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 07:36:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2023-11-19 07:36:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-19 07:36:47,386 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2023-11-19 07:36:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:47,387 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-19 07:36:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-19 07:36:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 07:36:47,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:47,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:47,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-19 07:36:47,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:47,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:47,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2023-11-19 07:36:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:36:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134982067] [2023-11-19 07:36:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:47,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:36:47,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:36:47,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 07:36:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:36:47,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:47,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:36:47,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134982067] [2023-11-19 07:36:47,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134982067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:47,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:47,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:47,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097043464] [2023-11-19 07:36:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:36:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:47,820 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:47,952 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-11-19 07:36:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 07:36:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:47,957 INFO L225 Difference]: With dead ends: 55 [2023-11-19 07:36:47,958 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 07:36:47,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:47,963 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:47,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 07:36:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-19 07:36:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-19 07:36:47,986 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2023-11-19 07:36:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:47,988 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-19 07:36:47,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-19 07:36:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:36:47,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:47,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:48,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:48,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:48,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:48,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2023-11-19 07:36:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:36:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656214055] [2023-11-19 07:36:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:36:48,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:36:48,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-19 07:36:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:48,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:36:48,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:48,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:36:48,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:36:48,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656214055] [2023-11-19 07:36:48,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656214055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:48,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:48,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:48,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133624397] [2023-11-19 07:36:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:48,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:36:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:48,595 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:48,707 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-11-19 07:36:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 07:36:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:48,710 INFO L225 Difference]: With dead ends: 56 [2023-11-19 07:36:48,710 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 07:36:48,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:48,713 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:48,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:36:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 07:36:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-19 07:36:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-19 07:36:48,724 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2023-11-19 07:36:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:48,724 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-19 07:36:48,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-19 07:36:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:36:48,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:48,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:48,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-19 07:36:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:48,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:48,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2023-11-19 07:36:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:36:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529308387] [2023-11-19 07:36:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:36:48,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:36:48,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-19 07:36:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:36:49,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:49,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:36:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529308387] [2023-11-19 07:36:49,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529308387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:49,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:49,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 07:36:49,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207402311] [2023-11-19 07:36:49,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:49,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:49,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:36:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:49,742 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:36:50,065 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-11-19 07:36:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:36:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 07:36:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:36:50,068 INFO L225 Difference]: With dead ends: 60 [2023-11-19 07:36:50,069 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:36:50,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:50,071 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:36:50,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:36:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:36:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-19 07:36:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:36:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-11-19 07:36:50,085 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2023-11-19 07:36:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:36:50,085 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-11-19 07:36:50,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-11-19 07:36:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:36:50,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:36:50,088 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:50,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:50,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:50,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2023-11-19 07:36:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:36:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641473261] [2023-11-19 07:36:50,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:50,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:36:50,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:36:50,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:36:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc74cd7-5238-4b57-b1dc-5f94db096df5/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-19 07:36:50,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:50,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:50,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:36:50,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:52,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:36:59,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:36:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641473261] [2023-11-19 07:36:59,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641473261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:59,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:59,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-19 07:36:59,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464932205] [2023-11-19 07:36:59,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:59,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:36:59,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:36:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:36:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:36:59,266 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)