./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --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 740290dda5575272bb23cb8f59f476bbd4d0eb4eae1c4b42019e214336dbab38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:43:09,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:43:09,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:43:10,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:43:10,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:43:10,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:43:10,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:43:10,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:43:10,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:43:10,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:43:10,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:43:10,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:43:10,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:43:10,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:43:10,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:43:10,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:43:10,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:43:10,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:43:10,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:43:10,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:43:10,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:43:10,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:43:10,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:43:10,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:43:10,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:43:10,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:43:10,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:43:10,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:43:10,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:43:10,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:43:10,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:43:10,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:43:10,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:43:10,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:43:10,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:43:10,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:43:10,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:43:10,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:43:10,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:43:10,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:43:10,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:43:10,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:43:10,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:43:10,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:43:10,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:43:10,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:43:10,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:43:10,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:43:10,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:43:10,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:43:10,215 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:43:10,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:43:10,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:43:10,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:43:10,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:43:10,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:43:10,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:43:10,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:43:10,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:43:10,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:43:10,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:43:10,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:43:10,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:43:10,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:43:10,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:43:10,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:43:10,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:43:10,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:43:10,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:43:10,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:43:10,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:43:10,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:43:10,225 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:43:10,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:43:10,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:43:10,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:43:10,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 740290dda5575272bb23cb8f59f476bbd4d0eb4eae1c4b42019e214336dbab38 [2021-11-13 18:43:10,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:43:10,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:43:10,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:43:10,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:43:10,672 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:43:10,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-13 18:43:10,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/data/1513580a7/97284f31a74b4618bd1dae84ee3514ee/FLAG67cea5e41 [2021-11-13 18:43:11,382 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:43:11,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-13 18:43:11,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/data/1513580a7/97284f31a74b4618bd1dae84ee3514ee/FLAG67cea5e41 [2021-11-13 18:43:11,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/data/1513580a7/97284f31a74b4618bd1dae84ee3514ee [2021-11-13 18:43:11,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:43:11,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:43:11,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:43:11,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:43:11,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:43:11,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:43:11" (1/1) ... [2021-11-13 18:43:11,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee8525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:11, skipping insertion in model container [2021-11-13 18:43:11,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:43:11" (1/1) ... [2021-11-13 18:43:11,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:43:11,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:43:12,069 WARN L228 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_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2021-11-13 18:43:12,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:43:12,158 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:43:12,210 WARN L228 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_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2021-11-13 18:43:12,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:43:12,272 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:43:12,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12 WrapperNode [2021-11-13 18:43:12,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:43:12,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:43:12,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:43:12,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:43:12,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:43:12,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:43:12,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:43:12,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:43:12,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:43:12,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:43:12,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:43:12,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:43:12,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (1/1) ... [2021-11-13 18:43:12,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:43:12,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:43:12,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:43:12,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:43:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:43:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:43:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:43:12,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:43:13,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:43:13,505 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:43:13,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:43:13 BoogieIcfgContainer [2021-11-13 18:43:13,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:43:13,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:43:13,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:43:13,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:43:13,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:43:11" (1/3) ... [2021-11-13 18:43:13,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f263c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:43:13, skipping insertion in model container [2021-11-13 18:43:13,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:43:12" (2/3) ... [2021-11-13 18:43:13,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f263c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:43:13, skipping insertion in model container [2021-11-13 18:43:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:43:13" (3/3) ... [2021-11-13 18:43:13,528 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-13 18:43:13,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:43:13,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:43:13,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:43:13,598 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:43:13,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:43:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.7014925373134329) internal successors, (228), 135 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 18:43:13,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:13,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:13,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash -793823884, now seen corresponding path program 1 times [2021-11-13 18:43:13,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:13,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153542307] [2021-11-13 18:43:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:13,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:14,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:14,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153542307] [2021-11-13 18:43:14,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153542307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:14,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:14,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:43:14,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359349144] [2021-11-13 18:43:14,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:14,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:43:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:43:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:14,119 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.7014925373134329) internal successors, (228), 135 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:14,290 INFO L93 Difference]: Finished difference Result 322 states and 522 transitions. [2021-11-13 18:43:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:43:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-13 18:43:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:14,321 INFO L225 Difference]: With dead ends: 322 [2021-11-13 18:43:14,323 INFO L226 Difference]: Without dead ends: 215 [2021-11-13 18:43:14,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:14,336 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 174 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.76ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:14,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 504 Invalid, 8 Unknown, 0 Unchecked, 15.76ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 51.65ms Time] [2021-11-13 18:43:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-13 18:43:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-11-13 18:43:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5047169811320755) internal successors, (319), 212 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 319 transitions. [2021-11-13 18:43:14,457 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 319 transitions. Word has length 60 [2021-11-13 18:43:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:14,459 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 319 transitions. [2021-11-13 18:43:14,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 319 transitions. [2021-11-13 18:43:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 18:43:14,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:14,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:43:14,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1200786689, now seen corresponding path program 1 times [2021-11-13 18:43:14,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:14,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125663114] [2021-11-13 18:43:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:14,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:14,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:14,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125663114] [2021-11-13 18:43:14,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125663114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:14,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:14,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:43:14,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215657251] [2021-11-13 18:43:14,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:14,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:43:14,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:43:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:14,699 INFO L87 Difference]: Start difference. First operand 213 states and 319 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:14,803 INFO L93 Difference]: Finished difference Result 537 states and 835 transitions. [2021-11-13 18:43:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:43:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-13 18:43:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:14,809 INFO L225 Difference]: With dead ends: 537 [2021-11-13 18:43:14,810 INFO L226 Difference]: Without dead ends: 359 [2021-11-13 18:43:14,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:14,822 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 139 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.20ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:14,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 13.20ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 28.44ms Time] [2021-11-13 18:43:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-13 18:43:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2021-11-13 18:43:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5393258426966292) internal successors, (548), 356 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 548 transitions. [2021-11-13 18:43:14,917 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 548 transitions. Word has length 61 [2021-11-13 18:43:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:14,919 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 548 transitions. [2021-11-13 18:43:14,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 548 transitions. [2021-11-13 18:43:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:43:14,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:14,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:14,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:43:14,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:14,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1872640227, now seen corresponding path program 1 times [2021-11-13 18:43:14,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:14,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807389102] [2021-11-13 18:43:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:14,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:15,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:15,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807389102] [2021-11-13 18:43:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807389102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:15,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:15,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:43:15,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032077080] [2021-11-13 18:43:15,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:15,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:43:15,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:43:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:15,108 INFO L87 Difference]: Start difference. First operand 357 states and 548 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:15,193 INFO L93 Difference]: Finished difference Result 937 states and 1470 transitions. [2021-11-13 18:43:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:43:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-13 18:43:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:15,200 INFO L225 Difference]: With dead ends: 937 [2021-11-13 18:43:15,200 INFO L226 Difference]: Without dead ends: 615 [2021-11-13 18:43:15,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:15,212 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 134 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:15,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 428 Invalid, 7 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 16.14ms Time] [2021-11-13 18:43:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-13 18:43:15,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2021-11-13 18:43:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.5555555555555556) internal successors, (952), 612 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 952 transitions. [2021-11-13 18:43:15,272 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 952 transitions. Word has length 62 [2021-11-13 18:43:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 952 transitions. [2021-11-13 18:43:15,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 952 transitions. [2021-11-13 18:43:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:43:15,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:15,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:15,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:43:15,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:15,277 INFO L85 PathProgramCache]: Analyzing trace with hash -562045070, now seen corresponding path program 1 times [2021-11-13 18:43:15,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:15,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826162907] [2021-11-13 18:43:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:15,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:15,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:15,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826162907] [2021-11-13 18:43:15,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826162907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:15,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:15,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:43:15,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709269578] [2021-11-13 18:43:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:15,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:43:15,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:43:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:15,365 INFO L87 Difference]: Start difference. First operand 613 states and 952 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:15,445 INFO L93 Difference]: Finished difference Result 1641 states and 2578 transitions. [2021-11-13 18:43:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:43:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-13 18:43:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:15,467 INFO L225 Difference]: With dead ends: 1641 [2021-11-13 18:43:15,468 INFO L226 Difference]: Without dead ends: 1063 [2021-11-13 18:43:15,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:15,479 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 129 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.45ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:15,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 413 Invalid, 7 Unknown, 0 Unchecked, 4.45ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 15.50ms Time] [2021-11-13 18:43:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-13 18:43:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1061. [2021-11-13 18:43:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.558490566037736) internal successors, (1652), 1060 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1652 transitions. [2021-11-13 18:43:15,578 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1652 transitions. Word has length 63 [2021-11-13 18:43:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:15,578 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1652 transitions. [2021-11-13 18:43:15,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1652 transitions. [2021-11-13 18:43:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:43:15,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:15,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:15,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:43:15,580 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1925116710, now seen corresponding path program 1 times [2021-11-13 18:43:15,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:15,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566393483] [2021-11-13 18:43:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:15,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:15,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:15,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566393483] [2021-11-13 18:43:15,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566393483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:15,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:15,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:43:15,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061407942] [2021-11-13 18:43:15,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:15,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:43:15,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:43:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:15,645 INFO L87 Difference]: Start difference. First operand 1061 states and 1652 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:15,760 INFO L93 Difference]: Finished difference Result 2857 states and 4470 transitions. [2021-11-13 18:43:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:43:15,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-13 18:43:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:15,782 INFO L225 Difference]: With dead ends: 2857 [2021-11-13 18:43:15,782 INFO L226 Difference]: Without dead ends: 1831 [2021-11-13 18:43:15,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:15,786 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 124 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:15,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 398 Invalid, 7 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 13.53ms Time] [2021-11-13 18:43:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-13 18:43:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1829. [2021-11-13 18:43:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 1.5514223194748358) internal successors, (2836), 1828 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2836 transitions. [2021-11-13 18:43:15,955 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2836 transitions. Word has length 64 [2021-11-13 18:43:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:15,956 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2836 transitions. [2021-11-13 18:43:15,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2836 transitions. [2021-11-13 18:43:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:43:15,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:15,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:15,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:43:15,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash 210559993, now seen corresponding path program 1 times [2021-11-13 18:43:15,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:15,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068612467] [2021-11-13 18:43:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:15,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:16,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:16,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068612467] [2021-11-13 18:43:16,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068612467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:16,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:16,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:43:16,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825606438] [2021-11-13 18:43:16,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:16,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:43:16,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:43:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:43:16,144 INFO L87 Difference]: Start difference. First operand 1829 states and 2836 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:17,099 INFO L93 Difference]: Finished difference Result 12593 states and 19642 transitions. [2021-11-13 18:43:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:43:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-13 18:43:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:17,187 INFO L225 Difference]: With dead ends: 12593 [2021-11-13 18:43:17,187 INFO L226 Difference]: Without dead ends: 10799 [2021-11-13 18:43:17,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:43:17,197 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 2059 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2059 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.16ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:17,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2059 Valid, 1257 Invalid, 60 Unknown, 0 Unchecked, 13.16ms Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 84.43ms Time] [2021-11-13 18:43:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10799 states. [2021-11-13 18:43:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10799 to 3621. [2021-11-13 18:43:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 1.5392265193370165) internal successors, (5572), 3620 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 5572 transitions. [2021-11-13 18:43:17,722 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 5572 transitions. Word has length 65 [2021-11-13 18:43:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:17,723 INFO L470 AbstractCegarLoop]: Abstraction has 3621 states and 5572 transitions. [2021-11-13 18:43:17,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 5572 transitions. [2021-11-13 18:43:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:43:17,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:17,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:17,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:43:17,726 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2082031049, now seen corresponding path program 1 times [2021-11-13 18:43:17,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:17,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695254842] [2021-11-13 18:43:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:17,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:17,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:17,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695254842] [2021-11-13 18:43:17,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695254842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:17,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:17,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:43:17,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365368508] [2021-11-13 18:43:17,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:17,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:43:17,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:43:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:43:17,967 INFO L87 Difference]: Start difference. First operand 3621 states and 5572 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:19,725 INFO L93 Difference]: Finished difference Result 18831 states and 28777 transitions. [2021-11-13 18:43:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:43:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 18:43:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:19,829 INFO L225 Difference]: With dead ends: 18831 [2021-11-13 18:43:19,829 INFO L226 Difference]: Without dead ends: 15245 [2021-11-13 18:43:19,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:43:19,840 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 671 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.10ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:19,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1292 Invalid, 137 Unknown, 0 Unchecked, 7.10ms Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 160.14ms Time] [2021-11-13 18:43:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15245 states. [2021-11-13 18:43:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15245 to 15237. [2021-11-13 18:43:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15237 states, 15236 states have (on average 1.520871619847729) internal successors, (23172), 15236 states have internal predecessors, (23172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15237 states to 15237 states and 23172 transitions. [2021-11-13 18:43:21,565 INFO L78 Accepts]: Start accepts. Automaton has 15237 states and 23172 transitions. Word has length 66 [2021-11-13 18:43:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:21,566 INFO L470 AbstractCegarLoop]: Abstraction has 15237 states and 23172 transitions. [2021-11-13 18:43:21,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 15237 states and 23172 transitions. [2021-11-13 18:43:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:43:21,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:21,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:21,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:43:21,571 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash 254256256, now seen corresponding path program 1 times [2021-11-13 18:43:21,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:21,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98817119] [2021-11-13 18:43:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:21,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:21,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:21,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98817119] [2021-11-13 18:43:21,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98817119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:21,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:21,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:43:21,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692965093] [2021-11-13 18:43:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:21,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:43:21,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:43:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:43:21,682 INFO L87 Difference]: Start difference. First operand 15237 states and 23172 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:24,290 INFO L93 Difference]: Finished difference Result 45641 states and 69446 transitions. [2021-11-13 18:43:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:43:24,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-13 18:43:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:24,392 INFO L225 Difference]: With dead ends: 45641 [2021-11-13 18:43:24,392 INFO L226 Difference]: Without dead ends: 30439 [2021-11-13 18:43:24,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:43:24,420 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 824 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.26ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 212 Invalid, 151 Unknown, 0 Unchecked, 6.26ms Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 216.36ms Time] [2021-11-13 18:43:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30439 states. [2021-11-13 18:43:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30439 to 30437. [2021-11-13 18:43:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30437 states, 30436 states have (on average 1.5120252332763833) internal successors, (46020), 30436 states have internal predecessors, (46020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30437 states to 30437 states and 46020 transitions. [2021-11-13 18:43:27,625 INFO L78 Accepts]: Start accepts. Automaton has 30437 states and 46020 transitions. Word has length 68 [2021-11-13 18:43:27,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:27,626 INFO L470 AbstractCegarLoop]: Abstraction has 30437 states and 46020 transitions. [2021-11-13 18:43:27,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 30437 states and 46020 transitions. [2021-11-13 18:43:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:43:27,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:27,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:27,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:43:27,629 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:27,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1142699675, now seen corresponding path program 1 times [2021-11-13 18:43:27,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:27,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982259472] [2021-11-13 18:43:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:27,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:27,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:27,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982259472] [2021-11-13 18:43:27,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982259472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:27,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:27,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:43:27,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106603112] [2021-11-13 18:43:27,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:27,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:43:27,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:43:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:43:27,749 INFO L87 Difference]: Start difference. First operand 30437 states and 46020 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:32,152 INFO L93 Difference]: Finished difference Result 62119 states and 93285 transitions. [2021-11-13 18:43:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:43:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-13 18:43:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:32,342 INFO L225 Difference]: With dead ends: 62119 [2021-11-13 18:43:32,342 INFO L226 Difference]: Without dead ends: 62117 [2021-11-13 18:43:32,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:43:32,365 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 300 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:32,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 939 Invalid, 28 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 28.49ms Time] [2021-11-13 18:43:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62117 states. [2021-11-13 18:43:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62117 to 31717. [2021-11-13 18:43:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31717 states, 31716 states have (on average 1.4913608273426662) internal successors, (47300), 31716 states have internal predecessors, (47300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31717 states to 31717 states and 47300 transitions. [2021-11-13 18:43:35,569 INFO L78 Accepts]: Start accepts. Automaton has 31717 states and 47300 transitions. Word has length 68 [2021-11-13 18:43:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:35,569 INFO L470 AbstractCegarLoop]: Abstraction has 31717 states and 47300 transitions. [2021-11-13 18:43:35,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 31717 states and 47300 transitions. [2021-11-13 18:43:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:43:35,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:35,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:35,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:43:35,572 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1053378469, now seen corresponding path program 1 times [2021-11-13 18:43:35,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:35,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18524631] [2021-11-13 18:43:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:35,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:35,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:35,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18524631] [2021-11-13 18:43:35,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18524631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:43:35,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:43:35,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:43:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712125602] [2021-11-13 18:43:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:43:35,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:43:35,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:43:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:35,637 INFO L87 Difference]: Start difference. First operand 31717 states and 47300 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:39,091 INFO L93 Difference]: Finished difference Result 70715 states and 105272 transitions. [2021-11-13 18:43:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:43:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-13 18:43:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:39,180 INFO L225 Difference]: With dead ends: 70715 [2021-11-13 18:43:39,181 INFO L226 Difference]: Without dead ends: 39033 [2021-11-13 18:43:39,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:43:39,231 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 112 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:39,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 385 Invalid, 7 Unknown, 0 Unchecked, 3.50ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 12.02ms Time] [2021-11-13 18:43:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39033 states. [2021-11-13 18:43:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39033 to 39031. [2021-11-13 18:43:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39031 states, 39030 states have (on average 1.4825006405329233) internal successors, (57862), 39030 states have internal predecessors, (57862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39031 states to 39031 states and 57862 transitions. [2021-11-13 18:43:42,801 INFO L78 Accepts]: Start accepts. Automaton has 39031 states and 57862 transitions. Word has length 69 [2021-11-13 18:43:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:42,802 INFO L470 AbstractCegarLoop]: Abstraction has 39031 states and 57862 transitions. [2021-11-13 18:43:42,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:43:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39031 states and 57862 transitions. [2021-11-13 18:43:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 18:43:42,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:42,837 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:42,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:43:42,838 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash -212554062, now seen corresponding path program 1 times [2021-11-13 18:43:42,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:42,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899642922] [2021-11-13 18:43:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:42,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:43:43,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:43,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899642922] [2021-11-13 18:43:43,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899642922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:43:43,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402240290] [2021-11-13 18:43:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:43,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:43:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:43:43,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:43:43,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd15869-3d1d-4eb6-ac38-6e0613ce18a3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:43:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:43:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:43:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:43:43,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:43:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:43:44,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402240290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:43:44,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:43:44,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2021-11-13 18:43:44,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548603034] [2021-11-13 18:43:44,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:43:44,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:43:44,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:43:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:43:44,805 INFO L87 Difference]: Start difference. First operand 39031 states and 57862 transitions. Second operand has 15 states, 15 states have (on average 18.0) internal successors, (270), 15 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)