./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/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_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/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_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/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 aef2c1937462dbebec0f20b91e94dc13324c16bfe08bd2a8715a5d8810e192c4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:36,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:36,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:39:36,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:36,868 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:36,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:36,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:36,907 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:36,908 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:36,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:36,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:36,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:36,915 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:36,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:36,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:39:36,917 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:36,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:36,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:36,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:36,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:39:36,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:36,920 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:39:36,921 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:36,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:39:36,922 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:36,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:36,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:36,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:36,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:36,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:36,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:36,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:39:36,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:36,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:36,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:36,928 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:39:36,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:36,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:36,928 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:36,929 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_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aef2c1937462dbebec0f20b91e94dc13324c16bfe08bd2a8715a5d8810e192c4 [2023-11-19 07:39:37,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:37,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:37,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:37,327 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:37,327 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:37,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-8.i [2023-11-19 07:39:40,486 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:40,776 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:40,777 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-8.i [2023-11-19 07:39:40,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/data/2b26e4c46/cb8cebf47a744bdd8df6942895f00537/FLAG43be5453e [2023-11-19 07:39:40,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/data/2b26e4c46/cb8cebf47a744bdd8df6942895f00537 [2023-11-19 07:39:40,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:40,817 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:40,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:40,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:40,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:40,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:40" (1/1) ... [2023-11-19 07:39:40,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15517f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:40, skipping insertion in model container [2023-11-19 07:39:40,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:40" (1/1) ... [2023-11-19 07:39:40,887 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:41,088 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_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-8.i[915,928] [2023-11-19 07:39:41,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:41,353 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:41,373 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_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-8.i[915,928] [2023-11-19 07:39:41,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:41,525 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:41,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41 WrapperNode [2023-11-19 07:39:41,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:41,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:41,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:41,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:41,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,674 INFO L138 Inliner]: procedures = 26, calls = 103, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 610 [2023-11-19 07:39:41,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:41,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:41,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:41,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:41,703 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,841 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,858 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:41,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:41,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:41,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:41,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (1/1) ... [2023-11-19 07:39:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:41,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:41,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:39:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:39:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:41,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:42,129 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:42,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:43,305 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:43,323 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:43,326 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:39:43,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:43 BoogieIcfgContainer [2023-11-19 07:39:43,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:43,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:43,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:43,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:43,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:40" (1/3) ... [2023-11-19 07:39:43,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3119cb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:43, skipping insertion in model container [2023-11-19 07:39:43,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:41" (2/3) ... [2023-11-19 07:39:43,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3119cb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:43, skipping insertion in model container [2023-11-19 07:39:43,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:43" (3/3) ... [2023-11-19 07:39:43,357 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-8.i [2023-11-19 07:39:43,379 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:43,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:43,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:43,457 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;@4af67539, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:43,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:39:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 148 states have (on average 1.5945945945945945) internal successors, (236), 149 states have internal predecessors, (236), 90 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-19 07:39:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2023-11-19 07:39:43,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:43,511 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:43,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:43,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1088260206, now seen corresponding path program 1 times [2023-11-19 07:39:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:43,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726217214] [2023-11-19 07:39:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:44,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726217214] [2023-11-19 07:39:44,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:39:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632866500] [2023-11-19 07:39:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:44,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:44,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:44,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:44,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:39:44,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2023-11-19 07:39:44,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:44,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632866500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:44,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:44,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:44,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106518636] [2023-11-19 07:39:44,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:39:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:39:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:39:44,889 INFO L87 Difference]: Start difference. First operand has 241 states, 148 states have (on average 1.5945945945945945) internal successors, (236), 149 states have internal predecessors, (236), 90 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-19 07:39:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:44,977 INFO L93 Difference]: Finished difference Result 475 states and 916 transitions. [2023-11-19 07:39:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:39:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 2 states have call successors, (90) Word has length 547 [2023-11-19 07:39:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:44,999 INFO L225 Difference]: With dead ends: 475 [2023-11-19 07:39:45,000 INFO L226 Difference]: Without dead ends: 237 [2023-11-19 07:39:45,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:39:45,021 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:45,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-19 07:39:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-11-19 07:39:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 145 states have internal predecessors, (225), 90 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-19 07:39:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 405 transitions. [2023-11-19 07:39:45,126 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 405 transitions. Word has length 547 [2023-11-19 07:39:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:45,127 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 405 transitions. [2023-11-19 07:39:45,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-19 07:39:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 405 transitions. [2023-11-19 07:39:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2023-11-19 07:39:45,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:45,151 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:45,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:45,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:39:45,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:45,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1777061881, now seen corresponding path program 1 times [2023-11-19 07:39:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:45,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615916645] [2023-11-19 07:39:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:45,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:45,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329871149] [2023-11-19 07:39:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:45,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:45,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:45,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:39:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:46,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:39:46,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16020 trivial. 0 not checked. [2023-11-19 07:39:46,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:46,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615916645] [2023-11-19 07:39:46,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329871149] [2023-11-19 07:39:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329871149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:46,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:46,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:39:46,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519722791] [2023-11-19 07:39:46,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:46,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:46,297 INFO L87 Difference]: Start difference. First operand 237 states and 405 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) [2023-11-19 07:39:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:46,818 INFO L93 Difference]: Finished difference Result 796 states and 1365 transitions. [2023-11-19 07:39:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:39:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) Word has length 548 [2023-11-19 07:39:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:46,830 INFO L225 Difference]: With dead ends: 796 [2023-11-19 07:39:46,831 INFO L226 Difference]: Without dead ends: 562 [2023-11-19 07:39:46,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:39:46,834 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 644 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:46,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 1033 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:39:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-19 07:39:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 553. [2023-11-19 07:39:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 373 states have (on average 1.6246648793565683) internal successors, (606), 376 states have internal predecessors, (606), 175 states have call successors, (175), 4 states have call predecessors, (175), 4 states have return successors, (175), 172 states have call predecessors, (175), 175 states have call successors, (175) [2023-11-19 07:39:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 956 transitions. [2023-11-19 07:39:46,961 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 956 transitions. Word has length 548 [2023-11-19 07:39:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:46,964 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 956 transitions. [2023-11-19 07:39:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) [2023-11-19 07:39:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 956 transitions. [2023-11-19 07:39:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2023-11-19 07:39:46,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:46,976 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:47,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:47,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:47,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash -977614705, now seen corresponding path program 1 times [2023-11-19 07:39:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595476674] [2023-11-19 07:39:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:47,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:47,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307124454] [2023-11-19 07:39:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:47,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:47,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:39:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:47,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:39:47,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 7967 proven. 150 refuted. 0 times theorem prover too weak. 7903 trivial. 0 not checked. [2023-11-19 07:39:48,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 117 proven. 150 refuted. 0 times theorem prover too weak. 15753 trivial. 0 not checked. [2023-11-19 07:39:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595476674] [2023-11-19 07:39:49,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:49,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307124454] [2023-11-19 07:39:49,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307124454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:49,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:49,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-11-19 07:39:49,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061403804] [2023-11-19 07:39:49,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:39:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:39:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:39:49,346 INFO L87 Difference]: Start difference. First operand 553 states and 956 transitions. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2023-11-19 07:39:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:54,179 INFO L93 Difference]: Finished difference Result 3352 states and 5631 transitions. [2023-11-19 07:39:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-19 07:39:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) Word has length 549 [2023-11-19 07:39:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:54,210 INFO L225 Difference]: With dead ends: 3352 [2023-11-19 07:39:54,210 INFO L226 Difference]: Without dead ends: 2802 [2023-11-19 07:39:54,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1092 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=803, Invalid=2737, Unknown=0, NotChecked=0, Total=3540 [2023-11-19 07:39:54,217 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 2050 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:54,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2094 Valid, 2165 Invalid, 2668 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1062 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-19 07:39:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2023-11-19 07:39:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2056. [2023-11-19 07:39:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 1394 states have (on average 1.6011477761836441) internal successors, (2232), 1411 states have internal predecessors, (2232), 633 states have call successors, (633), 28 states have call predecessors, (633), 28 states have return successors, (633), 616 states have call predecessors, (633), 633 states have call successors, (633) [2023-11-19 07:39:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 3498 transitions. [2023-11-19 07:39:54,666 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 3498 transitions. Word has length 549 [2023-11-19 07:39:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:54,669 INFO L495 AbstractCegarLoop]: Abstraction has 2056 states and 3498 transitions. [2023-11-19 07:39:54,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 2 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2023-11-19 07:39:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 3498 transitions. [2023-11-19 07:39:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2023-11-19 07:39:54,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:54,679 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:54,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:54,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:54,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:54,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1026371663, now seen corresponding path program 1 times [2023-11-19 07:39:54,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:54,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999185040] [2023-11-19 07:39:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:54,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:55,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:55,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978408434] [2023-11-19 07:39:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:55,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:55,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:39:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:55,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:55,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 8087 proven. 138 refuted. 0 times theorem prover too weak. 7795 trivial. 0 not checked. [2023-11-19 07:39:56,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 129 proven. 138 refuted. 0 times theorem prover too weak. 15753 trivial. 0 not checked. [2023-11-19 07:39:56,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:56,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999185040] [2023-11-19 07:39:56,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978408434] [2023-11-19 07:39:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978408434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:56,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:56,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:39:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349868919] [2023-11-19 07:39:56,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:39:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:39:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:39:56,775 INFO L87 Difference]: Start difference. First operand 2056 states and 3498 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 2 states have call predecessors, (137), 2 states have call successors, (137) [2023-11-19 07:39:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:57,661 INFO L93 Difference]: Finished difference Result 4000 states and 6800 transitions. [2023-11-19 07:39:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:39:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 2 states have call predecessors, (137), 2 states have call successors, (137) Word has length 549 [2023-11-19 07:39:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:57,686 INFO L225 Difference]: With dead ends: 4000 [2023-11-19 07:39:57,687 INFO L226 Difference]: Without dead ends: 1900 [2023-11-19 07:39:57,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1090 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:39:57,705 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 368 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:57,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 732 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:39:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-11-19 07:39:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1858. [2023-11-19 07:39:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1228 states have (on average 1.5537459283387622) internal successors, (1908), 1244 states have internal predecessors, (1908), 602 states have call successors, (602), 27 states have call predecessors, (602), 27 states have return successors, (602), 586 states have call predecessors, (602), 602 states have call successors, (602) [2023-11-19 07:39:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3112 transitions. [2023-11-19 07:39:58,107 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3112 transitions. Word has length 549 [2023-11-19 07:39:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:58,110 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 3112 transitions. [2023-11-19 07:39:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 2 states have call predecessors, (137), 2 states have call successors, (137) [2023-11-19 07:39:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3112 transitions. [2023-11-19 07:39:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2023-11-19 07:39:58,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:58,122 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:58,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:58,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:58,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:58,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:58,345 INFO L85 PathProgramCache]: Analyzing trace with hash 916185995, now seen corresponding path program 1 times [2023-11-19 07:39:58,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:58,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295521402] [2023-11-19 07:39:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:58,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:58,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524493638] [2023-11-19 07:39:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:58,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:58,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:58,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:39:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:58,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:58,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 8043 proven. 144 refuted. 0 times theorem prover too weak. 7833 trivial. 0 not checked. [2023-11-19 07:39:59,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 123 proven. 144 refuted. 0 times theorem prover too weak. 15753 trivial. 0 not checked. [2023-11-19 07:40:00,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295521402] [2023-11-19 07:40:00,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524493638] [2023-11-19 07:40:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524493638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:00,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:00,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:40:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256102727] [2023-11-19 07:40:00,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:00,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:40:00,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:40:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:00,044 INFO L87 Difference]: Start difference. First operand 1858 states and 3112 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) [2023-11-19 07:40:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:01,094 INFO L93 Difference]: Finished difference Result 3142 states and 5235 transitions. [2023-11-19 07:40:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:01,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) Word has length 549 [2023-11-19 07:40:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:01,106 INFO L225 Difference]: With dead ends: 3142 [2023-11-19 07:40:01,106 INFO L226 Difference]: Without dead ends: 1362 [2023-11-19 07:40:01,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1090 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:40:01,113 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 223 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:01,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 949 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:40:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-19 07:40:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1331. [2023-11-19 07:40:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 863 states have (on average 1.511008111239861) internal successors, (1304), 874 states have internal predecessors, (1304), 445 states have call successors, (445), 22 states have call predecessors, (445), 22 states have return successors, (445), 434 states have call predecessors, (445), 445 states have call successors, (445) [2023-11-19 07:40:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2194 transitions. [2023-11-19 07:40:01,376 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2194 transitions. Word has length 549 [2023-11-19 07:40:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:01,377 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 2194 transitions. [2023-11-19 07:40:01,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) [2023-11-19 07:40:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2194 transitions. [2023-11-19 07:40:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2023-11-19 07:40:01,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:01,385 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:01,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:01,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:01,599 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:01,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash 815028768, now seen corresponding path program 1 times [2023-11-19 07:40:01,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:01,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85919037] [2023-11-19 07:40:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:01,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:01,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698608373] [2023-11-19 07:40:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:01,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:01,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:01,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:02,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:40:02,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16020 trivial. 0 not checked. [2023-11-19 07:40:02,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85919037] [2023-11-19 07:40:02,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:02,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698608373] [2023-11-19 07:40:02,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698608373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:02,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:02,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679163567] [2023-11-19 07:40:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:02,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:02,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:02,969 INFO L87 Difference]: Start difference. First operand 1331 states and 2194 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) [2023-11-19 07:40:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:03,218 INFO L93 Difference]: Finished difference Result 3106 states and 5128 transitions. [2023-11-19 07:40:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) Word has length 549 [2023-11-19 07:40:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:03,235 INFO L225 Difference]: With dead ends: 3106 [2023-11-19 07:40:03,236 INFO L226 Difference]: Without dead ends: 1853 [2023-11-19 07:40:03,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 547 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 07:40:03,243 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 142 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:03,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 922 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2023-11-19 07:40:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1634. [2023-11-19 07:40:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1053 states have (on average 1.5061728395061729) internal successors, (1586), 1065 states have internal predecessors, (1586), 552 states have call successors, (552), 28 states have call predecessors, (552), 28 states have return successors, (552), 540 states have call predecessors, (552), 552 states have call successors, (552) [2023-11-19 07:40:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2690 transitions. [2023-11-19 07:40:03,523 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2690 transitions. Word has length 549 [2023-11-19 07:40:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:03,524 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 2690 transitions. [2023-11-19 07:40:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) [2023-11-19 07:40:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2690 transitions. [2023-11-19 07:40:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-11-19 07:40:03,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:03,532 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:03,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:03,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:03,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2048207177, now seen corresponding path program 1 times [2023-11-19 07:40:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006544438] [2023-11-19 07:40:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:03,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:03,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971267571] [2023-11-19 07:40:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:03,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:03,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:03,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:03,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:40:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:04,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:04,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16020 trivial. 0 not checked. [2023-11-19 07:40:05,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:05,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006544438] [2023-11-19 07:40:05,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:05,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971267571] [2023-11-19 07:40:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971267571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:05,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:05,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582114488] [2023-11-19 07:40:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:05,257 INFO L87 Difference]: Start difference. First operand 1634 states and 2690 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) [2023-11-19 07:40:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:05,915 INFO L93 Difference]: Finished difference Result 4731 states and 7830 transitions. [2023-11-19 07:40:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) Word has length 550 [2023-11-19 07:40:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:05,944 INFO L225 Difference]: With dead ends: 4731 [2023-11-19 07:40:05,945 INFO L226 Difference]: Without dead ends: 3186 [2023-11-19 07:40:05,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:05,952 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 141 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:05,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 982 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:40:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2023-11-19 07:40:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3177. [2023-11-19 07:40:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 2064 states have (on average 1.5096899224806202) internal successors, (3116), 2087 states have internal predecessors, (3116), 1061 states have call successors, (1061), 51 states have call predecessors, (1061), 51 states have return successors, (1061), 1038 states have call predecessors, (1061), 1061 states have call successors, (1061) [2023-11-19 07:40:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 5238 transitions. [2023-11-19 07:40:06,650 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 5238 transitions. Word has length 550 [2023-11-19 07:40:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:06,651 INFO L495 AbstractCegarLoop]: Abstraction has 3177 states and 5238 transitions. [2023-11-19 07:40:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 1 states have call predecessors, (90), 1 states have call successors, (90) [2023-11-19 07:40:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 5238 transitions. [2023-11-19 07:40:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-19 07:40:06,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:06,669 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:06,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:06,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:06,881 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:06,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -493962981, now seen corresponding path program 1 times [2023-11-19 07:40:06,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:06,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143124381] [2023-11-19 07:40:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:06,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:06,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471931040] [2023-11-19 07:40:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:06,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:07,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d09e4420-f1ce-49c8-9302-a39e1d7a3d4b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:40:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:07,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:40:07,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 5913 proven. 402 refuted. 0 times theorem prover too weak. 9705 trivial. 0 not checked. [2023-11-19 07:40:10,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16020 backedges. 126 proven. 405 refuted. 0 times theorem prover too weak. 15489 trivial. 0 not checked. [2023-11-19 07:40:11,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:11,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143124381] [2023-11-19 07:40:11,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:11,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471931040] [2023-11-19 07:40:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471931040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-19 07:40:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049109246] [2023-11-19 07:40:11,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:11,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:40:11,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:40:11,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:40:11,831 INFO L87 Difference]: Start difference. First operand 3177 states and 5238 transitions. Second operand has 20 states, 19 states have (on average 11.473684210526315) internal successors, (218), 18 states have internal predecessors, (218), 6 states have call successors, (180), 4 states have call predecessors, (180), 7 states have return successors, (180), 6 states have call predecessors, (180), 6 states have call successors, (180)