./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/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_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/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_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/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 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:53:32,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:53:32,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:53:32,812 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:53:32,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:53:32,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:53:32,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:53:32,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:53:32,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:53:32,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:53:32,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:53:32,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:53:32,844 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:53:32,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:53:32,845 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:53:32,846 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:53:32,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:53:32,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:53:32,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:53:32,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:53:32,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:53:32,850 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:53:32,850 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:53:32,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:53:32,852 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:53:32,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:53:32,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:53:32,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:53:32,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:32,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:53:32,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:53:32,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:53:32,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:53:32,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:53:32,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:53:32,857 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:53:32,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:53:32,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:53:32,859 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:53:32,859 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_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2023-11-19 07:53:33,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:53:33,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:53:33,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:53:33,156 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:53:33,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:53:33,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2023-11-19 07:53:36,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:53:36,571 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:53:36,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2023-11-19 07:53:36,596 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/data/9c2ff755d/9f915b9dac5643c6a0ca0e8ad22fc686/FLAGa623dd068 [2023-11-19 07:53:36,611 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/data/9c2ff755d/9f915b9dac5643c6a0ca0e8ad22fc686 [2023-11-19 07:53:36,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:53:36,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:53:36,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:36,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:53:36,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:53:36,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:36" (1/1) ... [2023-11-19 07:53:36,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c67eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:36, skipping insertion in model container [2023-11-19 07:53:36,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:36" (1/1) ... [2023-11-19 07:53:36,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:53:37,006 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_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2023-11-19 07:53:37,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:37,022 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:53:37,066 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_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2023-11-19 07:53:37,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:37,098 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:53:37,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37 WrapperNode [2023-11-19 07:53:37,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:37,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:37,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:53:37,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:53:37,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,150 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2023-11-19 07:53:37,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:37,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:53:37,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:53:37,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:53:37,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:53:37,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:53:37,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:53:37,188 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:53:37,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (1/1) ... [2023-11-19 07:53:37,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:37,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:37,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:53:37,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:53:37,298 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-19 07:53:37,298 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-19 07:53:37,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:53:37,299 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-11-19 07:53:37,300 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-11-19 07:53:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:53:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:53:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:53:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:53:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:53:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 07:53:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:53:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:53:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:53:37,457 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:53:37,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:53:37,498 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-19 07:53:37,757 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:53:37,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:53:37,766 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:53:37,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:37 BoogieIcfgContainer [2023-11-19 07:53:37,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:53:37,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:53:37,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:53:37,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:53:37,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:53:36" (1/3) ... [2023-11-19 07:53:37,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c124435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:37, skipping insertion in model container [2023-11-19 07:53:37,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:37" (2/3) ... [2023-11-19 07:53:37,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c124435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:37, skipping insertion in model container [2023-11-19 07:53:37,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:37" (3/3) ... [2023-11-19 07:53:37,780 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2023-11-19 07:53:37,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:53:37,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:53:37,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:53:37,859 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;@20d3aa7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:53:37,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:53:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:53:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:53:37,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:37,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:37,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:37,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash 674316384, now seen corresponding path program 1 times [2023-11-19 07:53:37,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724207234] [2023-11-19 07:53:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:38,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-19 07:53:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:53:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724207234] [2023-11-19 07:53:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724207234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:38,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:38,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:53:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701061585] [2023-11-19 07:53:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:38,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:53:38,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:53:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:53:38,268 INFO L87 Difference]: Start difference. First operand has 47 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:53:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:38,291 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2023-11-19 07:53:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:53:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-19 07:53:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:38,309 INFO L225 Difference]: With dead ends: 91 [2023-11-19 07:53:38,310 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 07:53:38,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 07:53:38,320 INFO L413 NwaCegarLoop]: 59 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, 59 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 07:53:38,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:53:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 07:53:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-19 07:53:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:53:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-19 07:53:38,371 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 26 [2023-11-19 07:53:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:38,371 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-19 07:53:38,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:53:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-11-19 07:53:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 07:53:38,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:38,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:53:38,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:38,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash -170080666, now seen corresponding path program 1 times [2023-11-19 07:53:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:38,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113114016] [2023-11-19 07:53:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:38,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:38,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-19 07:53:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:53:38,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:38,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113114016] [2023-11-19 07:53:38,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113114016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:38,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573881490] [2023-11-19 07:53:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:38,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:38,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:38,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:38,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:53:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:39,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:53:39,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:39,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:53:39,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573881490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:39,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:53:39,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-19 07:53:39,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354676085] [2023-11-19 07:53:39,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:53:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:53:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:53:39,262 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:53:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:39,357 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2023-11-19 07:53:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:53:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-19 07:53:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:39,360 INFO L225 Difference]: With dead ends: 70 [2023-11-19 07:53:39,360 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 07:53:39,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:53:39,363 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:39,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 211 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 07:53:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-19 07:53:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:53:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-11-19 07:53:39,373 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 33 [2023-11-19 07:53:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:39,375 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-11-19 07:53:39,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:53:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-11-19 07:53:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 07:53:39,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:39,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 07:53:39,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:53:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:39,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:39,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2056450253, now seen corresponding path program 1 times [2023-11-19 07:53:39,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:39,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198398216] [2023-11-19 07:53:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:39,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:39,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:53:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:53:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198398216] [2023-11-19 07:53:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198398216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:39,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:39,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:53:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001059848] [2023-11-19 07:53:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:39,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:53:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:53:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:53:39,804 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:53:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:40,086 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-11-19 07:53:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:53:40,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-11-19 07:53:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:40,092 INFO L225 Difference]: With dead ends: 65 [2023-11-19 07:53:40,093 INFO L226 Difference]: Without dead ends: 60 [2023-11-19 07:53:40,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:53:40,097 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:40,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 197 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-19 07:53:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2023-11-19 07:53:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:53:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-19 07:53:40,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 37 [2023-11-19 07:53:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:40,110 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-19 07:53:40,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:53:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-11-19 07:53:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:53:40,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:40,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 07:53:40,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:53:40,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:40,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash -622897270, now seen corresponding path program 1 times [2023-11-19 07:53:40,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:40,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178505404] [2023-11-19 07:53:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:40,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:53:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:53:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:40,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178505404] [2023-11-19 07:53:40,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178505404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:40,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:40,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:53:40,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545398132] [2023-11-19 07:53:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:40,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:53:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:53:40,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:53:40,431 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:53:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:40,568 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2023-11-19 07:53:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:53:40,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-11-19 07:53:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:40,572 INFO L225 Difference]: With dead ends: 103 [2023-11-19 07:53:40,572 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 07:53:40,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:53:40,575 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:40,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 201 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 07:53:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2023-11-19 07:53:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:53:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2023-11-19 07:53:40,589 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 38 [2023-11-19 07:53:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:40,590 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2023-11-19 07:53:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:53:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2023-11-19 07:53:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:53:40,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:40,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 07:53:40,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:53:40,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:40,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:40,594 INFO L85 PathProgramCache]: Analyzing trace with hash 57161100, now seen corresponding path program 1 times [2023-11-19 07:53:40,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862134361] [2023-11-19 07:53:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:53:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:53:40,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862134361] [2023-11-19 07:53:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862134361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562449941] [2023-11-19 07:53:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:40,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:40,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:40,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:53:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:40,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:53:40,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:53:41,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:53:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:53:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562449941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:53:41,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:53:41,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-19 07:53:41,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652108009] [2023-11-19 07:53:41,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:53:41,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:53:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:53:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:53:41,369 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:53:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:41,679 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2023-11-19 07:53:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:53:41,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-19 07:53:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:41,683 INFO L225 Difference]: With dead ends: 118 [2023-11-19 07:53:41,683 INFO L226 Difference]: Without dead ends: 72 [2023-11-19 07:53:41,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:53:41,685 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 31 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:41,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 376 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-19 07:53:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-11-19 07:53:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:53:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2023-11-19 07:53:41,696 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 38 [2023-11-19 07:53:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:41,697 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2023-11-19 07:53:41,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:53:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2023-11-19 07:53:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 07:53:41,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:41,699 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:41,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:53:41,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:41,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:41,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1539273605, now seen corresponding path program 2 times [2023-11-19 07:53:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431715368] [2023-11-19 07:53:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:41,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:42,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:42,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-19 07:53:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:53:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431715368] [2023-11-19 07:53:42,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431715368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428678597] [2023-11-19 07:53:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:53:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:42,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:42,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:53:42,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:53:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:53:42,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:53:42,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:42,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:53:42,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 07:53:42,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:53:42,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-19 07:53:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:42,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:53:42,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-19 07:53:43,122 INFO L349 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2023-11-19 07:53:43,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2023-11-19 07:53:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:53:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428678597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:53:43,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:53:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2023-11-19 07:53:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871681412] [2023-11-19 07:53:43,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:53:43,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:53:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:53:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:53:43,202 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:53:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:43,664 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2023-11-19 07:53:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:53:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-11-19 07:53:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:43,666 INFO L225 Difference]: With dead ends: 100 [2023-11-19 07:53:43,666 INFO L226 Difference]: Without dead ends: 95 [2023-11-19 07:53:43,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:53:43,668 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:43,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 614 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:53:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-19 07:53:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2023-11-19 07:53:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 07:53:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-11-19 07:53:43,685 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 42 [2023-11-19 07:53:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:43,685 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-11-19 07:53:43,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:53:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-11-19 07:53:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:53:43,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:43,687 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:43,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:53:43,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:43,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:43,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 524495826, now seen corresponding path program 3 times [2023-11-19 07:53:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602460797] [2023-11-19 07:53:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:44,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-19 07:53:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:53:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602460797] [2023-11-19 07:53:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602460797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970665330] [2023-11-19 07:53:44,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:53:44,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:44,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:44,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:53:44,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:53:44,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:53:44,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:53:44,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:53:44,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:53:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:53:44,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970665330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:53:44,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:53:44,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 26 [2023-11-19 07:53:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558177646] [2023-11-19 07:53:44,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:53:44,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 07:53:44,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:53:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:53:44,956 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:53:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:45,361 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2023-11-19 07:53:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:53:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-11-19 07:53:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:45,370 INFO L225 Difference]: With dead ends: 146 [2023-11-19 07:53:45,371 INFO L226 Difference]: Without dead ends: 141 [2023-11-19 07:53:45,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:53:45,375 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 629 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:53:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-19 07:53:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 95. [2023-11-19 07:53:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 85 states have (on average 1.2) internal successors, (102), 86 states have internal predecessors, (102), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-19 07:53:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2023-11-19 07:53:45,432 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2023-11-19 07:53:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:45,434 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2023-11-19 07:53:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:53:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2023-11-19 07:53:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 07:53:45,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:45,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:45,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:53:45,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:45,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:45,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash -868844251, now seen corresponding path program 4 times [2023-11-19 07:53:45,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:45,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130608306] [2023-11-19 07:53:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:45,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:53:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-19 07:53:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:53:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130608306] [2023-11-19 07:53:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130608306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:46,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191992530] [2023-11-19 07:53:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:53:46,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:46,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:46,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:46,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b63e7d48-465b-4e6d-9320-c56b7c2c7d82/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:53:46,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:53:46,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:53:46,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-19 07:53:46,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:46,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:53:46,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:53:46,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:53:46,679 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:53:46,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:53:46,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-19 07:53:46,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-19 07:53:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:47,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:53:48,342 INFO L349 Elim1Store]: treesize reduction 11, result has 81.0 percent of original size [2023-11-19 07:53:48,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 3892 treesize of output 3694 [2023-11-19 07:53:52,875 INFO L349 Elim1Store]: treesize reduction 1303, result has 39.2 percent of original size [2023-11-19 07:53:52,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 24 new quantified variables, introduced 210 case distinctions, treesize of input 6994 treesize of output 6981