./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX --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 6e05a5715efe3542ecf168567bbc3b562485bd2f451d3afb75e5031d784b584a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:36:29,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:36:29,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:36:29,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:36:29,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:36:29,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:36:29,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:36:29,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:36:29,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:36:29,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:36:29,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:36:29,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:36:29,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:36:29,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:36:29,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:36:29,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:36:29,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:36:29,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:36:29,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:36:29,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:36:29,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:36:29,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:36:29,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:36:29,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:36:29,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:36:29,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:36:29,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:36:29,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:36:29,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:36:29,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:36:29,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:36:29,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:36:29,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:36:29,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:36:29,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:36:29,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:36:29,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:36:29,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:36:29,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:36:29,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:36:29,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:36:29,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:36:29,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:36:29,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:36:29,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:36:29,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:36:29,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:36:29,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:36:29,392 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:36:29,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:36:29,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:36:29,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:36:29,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:36:29,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:36:29,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:36:29,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:36:29,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:36:29,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:36:29,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:36:29,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:36:29,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:36:29,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:36:29,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:36:29,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:36:29,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:36:29,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:36:29,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:36:29,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:36:29,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:36:29,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:36:29,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:36:29,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:36:29,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:36:29,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:36:29,397 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_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e05a5715efe3542ecf168567bbc3b562485bd2f451d3afb75e5031d784b584a [2021-11-09 08:36:29,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:36:29,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:36:29,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:36:29,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:36:29,682 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:36:29,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-09 08:36:29,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/data/9706819c1/282f9a90dace4bf3af70ca04f9c11296/FLAG02034f5e1 [2021-11-09 08:36:30,658 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:36:30,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-09 08:36:30,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/data/9706819c1/282f9a90dace4bf3af70ca04f9c11296/FLAG02034f5e1 [2021-11-09 08:36:31,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/data/9706819c1/282f9a90dace4bf3af70ca04f9c11296 [2021-11-09 08:36:31,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:36:31,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:36:31,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:36:31,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:36:31,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:36:31,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:36:31" (1/1) ... [2021-11-09 08:36:31,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792e0727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:31, skipping insertion in model container [2021-11-09 08:36:31,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:36:31" (1/1) ... [2021-11-09 08:36:31,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:36:31,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:36:31,852 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_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11758,11771] [2021-11-09 08:36:31,916 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_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18576,18589] [2021-11-09 08:36:33,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:36:33,053 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:36:33,120 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_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11758,11771] [2021-11-09 08:36:33,134 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_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18576,18589] [2021-11-09 08:36:33,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:36:33,720 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:36:33,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33 WrapperNode [2021-11-09 08:36:33,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:36:33,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:36:33,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:36:33,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:36:33,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:33,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:36:34,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:36:34,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:36:34,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:36:34,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:36:34,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:36:34,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:36:34,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:36:34,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (1/1) ... [2021-11-09 08:36:34,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:36:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:34,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:36:34,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:36:34,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:36:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:36:34,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:36:34,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:36:40,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:36:40,018 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-11-09 08:36:40,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:40 BoogieIcfgContainer [2021-11-09 08:36:40,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:36:40,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:36:40,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:36:40,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:36:40,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:36:31" (1/3) ... [2021-11-09 08:36:40,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c2fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:40, skipping insertion in model container [2021-11-09 08:36:40,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:33" (2/3) ... [2021-11-09 08:36:40,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c2fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:40, skipping insertion in model container [2021-11-09 08:36:40,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:40" (3/3) ... [2021-11-09 08:36:40,034 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-09 08:36:40,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:36:40,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 08:36:40,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:36:40,129 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 [2021-11-09 08:36:40,129 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 08:36:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 910 states, 907 states have (on average 1.9007717750826902) internal successors, (1724), 909 states have internal predecessors, (1724), 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) [2021-11-09 08:36:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:36:40,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:40,187 INFO L513 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] [2021-11-09 08:36:40,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-11-09 08:36:40,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:40,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960260588] [2021-11-09 08:36:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:40,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:40,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:40,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960260588] [2021-11-09 08:36:40,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960260588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:40,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:40,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:36:40,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623475667] [2021-11-09 08:36:40,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:36:40,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:36:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:36:40,543 INFO L87 Difference]: Start difference. First operand has 910 states, 907 states have (on average 1.9007717750826902) internal successors, (1724), 909 states have internal predecessors, (1724), 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 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2021-11-09 08:36:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:40,624 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2021-11-09 08:36:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:36:40,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 34 [2021-11-09 08:36:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:40,649 INFO L225 Difference]: With dead ends: 1781 [2021-11-09 08:36:40,649 INFO L226 Difference]: Without dead ends: 844 [2021-11-09 08:36:40,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:36:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-09 08:36:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2021-11-09 08:36:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8895486935866983) internal successors, (1591), 843 states have internal predecessors, (1591), 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) [2021-11-09 08:36:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2021-11-09 08:36:40,777 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2021-11-09 08:36:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:40,777 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2021-11-09 08:36:40,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2021-11-09 08:36:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2021-11-09 08:36:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:36:40,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:40,785 INFO L513 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] [2021-11-09 08:36:40,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:36:40,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-11-09 08:36:40,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:40,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725211560] [2021-11-09 08:36:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:40,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:40,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:40,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725211560] [2021-11-09 08:36:40,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725211560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:40,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:40,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:36:40,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714327145] [2021-11-09 08:36:40,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:40,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:40,971 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-11-09 08:36:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:41,157 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2021-11-09 08:36:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:36:41,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 34 [2021-11-09 08:36:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:41,164 INFO L225 Difference]: With dead ends: 901 [2021-11-09 08:36:41,165 INFO L226 Difference]: Without dead ends: 844 [2021-11-09 08:36:41,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-09 08:36:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2021-11-09 08:36:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.852731591448931) internal successors, (1560), 843 states have internal predecessors, (1560), 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) [2021-11-09 08:36:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2021-11-09 08:36:41,195 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2021-11-09 08:36:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2021-11-09 08:36:41,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-11-09 08:36:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2021-11-09 08:36:41,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:36:41,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:41,206 INFO L513 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] [2021-11-09 08:36:41,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:36:41,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash -918859349, now seen corresponding path program 1 times [2021-11-09 08:36:41,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:41,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711679160] [2021-11-09 08:36:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:41,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:41,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:41,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711679160] [2021-11-09 08:36:41,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711679160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:41,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:36:41,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806198651] [2021-11-09 08:36:41,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:41,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:41,354 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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) [2021-11-09 08:36:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:45,786 INFO L93 Difference]: Finished difference Result 2348 states and 4433 transitions. [2021-11-09 08:36:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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 [2021-11-09 08:36:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:45,800 INFO L225 Difference]: With dead ends: 2348 [2021-11-09 08:36:45,800 INFO L226 Difference]: Without dead ends: 1595 [2021-11-09 08:36:45,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-11-09 08:36:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2021-11-09 08:36:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1593 states have (on average 1.842435655994978) internal successors, (2935), 1594 states have internal predecessors, (2935), 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) [2021-11-09 08:36:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2935 transitions. [2021-11-09 08:36:45,858 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2935 transitions. Word has length 61 [2021-11-09 08:36:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:45,859 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2935 transitions. [2021-11-09 08:36:45,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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) [2021-11-09 08:36:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2935 transitions. [2021-11-09 08:36:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:36:45,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:45,861 INFO L513 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] [2021-11-09 08:36:45,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:36:45,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-11-09 08:36:45,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:45,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728159541] [2021-11-09 08:36:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:45,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:45,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:45,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728159541] [2021-11-09 08:36:45,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728159541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:45,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:45,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:45,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714812143] [2021-11-09 08:36:45,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:45,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:45,983 INFO L87 Difference]: Start difference. First operand 1595 states and 2935 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) [2021-11-09 08:36:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:46,028 INFO L93 Difference]: Finished difference Result 1695 states and 3093 transitions. [2021-11-09 08:36:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:46,029 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 [2021-11-09 08:36:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:46,043 INFO L225 Difference]: With dead ends: 1695 [2021-11-09 08:36:46,044 INFO L226 Difference]: Without dead ends: 1642 [2021-11-09 08:36:46,045 INFO L786 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 [2021-11-09 08:36:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-11-09 08:36:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2021-11-09 08:36:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1638 states have (on average 1.8357753357753357) internal successors, (3007), 1639 states have internal predecessors, (3007), 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) [2021-11-09 08:36:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 3007 transitions. [2021-11-09 08:36:46,094 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 3007 transitions. Word has length 64 [2021-11-09 08:36:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:46,095 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 3007 transitions. [2021-11-09 08:36:46,096 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) [2021-11-09 08:36:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 3007 transitions. [2021-11-09 08:36:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:36:46,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:46,099 INFO L513 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] [2021-11-09 08:36:46,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:36:46,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-11-09 08:36:46,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:46,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295803742] [2021-11-09 08:36:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:46,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:46,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:46,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295803742] [2021-11-09 08:36:46,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295803742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:46,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:46,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:36:46,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175940457] [2021-11-09 08:36:46,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:46,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:46,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:46,283 INFO L87 Difference]: Start difference. First operand 1640 states and 3007 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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) [2021-11-09 08:36:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:46,549 INFO L93 Difference]: Finished difference Result 2620 states and 4567 transitions. [2021-11-09 08:36:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:36:46,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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 [2021-11-09 08:36:46,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:46,570 INFO L225 Difference]: With dead ends: 2620 [2021-11-09 08:36:46,570 INFO L226 Difference]: Without dead ends: 2522 [2021-11-09 08:36:46,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:36:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-11-09 08:36:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2021-11-09 08:36:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1734 states have (on average 1.8212226066897348) internal successors, (3158), 1735 states have internal predecessors, (3158), 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) [2021-11-09 08:36:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 3158 transitions. [2021-11-09 08:36:46,641 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 3158 transitions. Word has length 64 [2021-11-09 08:36:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:46,644 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 3158 transitions. [2021-11-09 08:36:46,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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) [2021-11-09 08:36:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 3158 transitions. [2021-11-09 08:36:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:36:46,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:46,645 INFO L513 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] [2021-11-09 08:36:46,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:36:46,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-11-09 08:36:46,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:46,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003706932] [2021-11-09 08:36:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:46,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:46,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:46,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003706932] [2021-11-09 08:36:46,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003706932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:46,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:46,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:46,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29446643] [2021-11-09 08:36:46,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:46,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:46,743 INFO L87 Difference]: Start difference. First operand 1736 states and 3158 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:46,799 INFO L93 Difference]: Finished difference Result 2102 states and 3734 transitions. [2021-11-09 08:36:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:46,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 [2021-11-09 08:36:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:46,823 INFO L225 Difference]: With dead ends: 2102 [2021-11-09 08:36:46,823 INFO L226 Difference]: Without dead ends: 1908 [2021-11-09 08:36:46,824 INFO L786 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 [2021-11-09 08:36:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-11-09 08:36:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2021-11-09 08:36:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1900 states have (on average 1.7957894736842106) internal successors, (3412), 1901 states have internal predecessors, (3412), 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) [2021-11-09 08:36:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3412 transitions. [2021-11-09 08:36:46,894 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3412 transitions. Word has length 66 [2021-11-09 08:36:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:46,894 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 3412 transitions. [2021-11-09 08:36:46,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3412 transitions. [2021-11-09 08:36:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:36:46,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:46,896 INFO L513 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] [2021-11-09 08:36:46,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:36:46,897 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-11-09 08:36:46,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:46,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56286423] [2021-11-09 08:36:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:46,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:47,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:47,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56286423] [2021-11-09 08:36:47,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56286423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:47,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:47,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:36:47,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198203089] [2021-11-09 08:36:47,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:47,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:47,161 INFO L87 Difference]: Start difference. First operand 1902 states and 3412 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) [2021-11-09 08:36:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:47,392 INFO L93 Difference]: Finished difference Result 2264 states and 3974 transitions. [2021-11-09 08:36:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:36:47,393 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 [2021-11-09 08:36:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:47,405 INFO L225 Difference]: With dead ends: 2264 [2021-11-09 08:36:47,405 INFO L226 Difference]: Without dead ends: 1904 [2021-11-09 08:36:47,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:36:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-09 08:36:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2021-11-09 08:36:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1900 states have (on average 1.7936842105263158) internal successors, (3408), 1901 states have internal predecessors, (3408), 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) [2021-11-09 08:36:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3408 transitions. [2021-11-09 08:36:47,470 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3408 transitions. Word has length 66 [2021-11-09 08:36:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:47,470 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 3408 transitions. [2021-11-09 08:36:47,471 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) [2021-11-09 08:36:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3408 transitions. [2021-11-09 08:36:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:36:47,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:47,472 INFO L513 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] [2021-11-09 08:36:47,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:36:47,473 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:47,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-11-09 08:36:47,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:47,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344192855] [2021-11-09 08:36:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:47,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:47,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:47,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344192855] [2021-11-09 08:36:47,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344192855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:47,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:47,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:47,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732217553] [2021-11-09 08:36:47,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:47,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:47,522 INFO L87 Difference]: Start difference. First operand 1902 states and 3408 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:47,588 INFO L93 Difference]: Finished difference Result 2574 states and 4442 transitions. [2021-11-09 08:36:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 [2021-11-09 08:36:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:47,603 INFO L225 Difference]: With dead ends: 2574 [2021-11-09 08:36:47,603 INFO L226 Difference]: Without dead ends: 2214 [2021-11-09 08:36:47,605 INFO L786 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 [2021-11-09 08:36:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-11-09 08:36:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2021-11-09 08:36:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2210 states have (on average 1.7538461538461538) internal successors, (3876), 2211 states have internal predecessors, (3876), 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) [2021-11-09 08:36:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3876 transitions. [2021-11-09 08:36:47,721 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3876 transitions. Word has length 66 [2021-11-09 08:36:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:47,722 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3876 transitions. [2021-11-09 08:36:47,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3876 transitions. [2021-11-09 08:36:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:36:47,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:47,724 INFO L513 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] [2021-11-09 08:36:47,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:36:47,724 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-11-09 08:36:47,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:47,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983931141] [2021-11-09 08:36:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:47,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:47,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:47,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983931141] [2021-11-09 08:36:47,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983931141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:47,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:47,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303216030] [2021-11-09 08:36:47,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:47,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:47,779 INFO L87 Difference]: Start difference. First operand 2212 states and 3876 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:47,875 INFO L93 Difference]: Finished difference Result 3456 states and 5766 transitions. [2021-11-09 08:36:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 [2021-11-09 08:36:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:47,893 INFO L225 Difference]: With dead ends: 3456 [2021-11-09 08:36:47,893 INFO L226 Difference]: Without dead ends: 2786 [2021-11-09 08:36:47,895 INFO L786 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 [2021-11-09 08:36:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-11-09 08:36:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2021-11-09 08:36:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2782 states have (on average 1.698058950395399) internal successors, (4724), 2783 states have internal predecessors, (4724), 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) [2021-11-09 08:36:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4724 transitions. [2021-11-09 08:36:48,007 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4724 transitions. Word has length 66 [2021-11-09 08:36:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:48,007 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 4724 transitions. [2021-11-09 08:36:48,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4724 transitions. [2021-11-09 08:36:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:36:48,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:48,009 INFO L513 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] [2021-11-09 08:36:48,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:36:48,009 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-11-09 08:36:48,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:48,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426530920] [2021-11-09 08:36:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:48,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:48,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:48,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426530920] [2021-11-09 08:36:48,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426530920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:48,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:48,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:48,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250312861] [2021-11-09 08:36:48,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:48,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:48,075 INFO L87 Difference]: Start difference. First operand 2784 states and 4724 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:48,220 INFO L93 Difference]: Finished difference Result 5076 states and 8150 transitions. [2021-11-09 08:36:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 [2021-11-09 08:36:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:48,243 INFO L225 Difference]: With dead ends: 5076 [2021-11-09 08:36:48,243 INFO L226 Difference]: Without dead ends: 3834 [2021-11-09 08:36:48,247 INFO L786 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 [2021-11-09 08:36:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-11-09 08:36:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2021-11-09 08:36:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3830 states have (on average 1.6302872062663185) internal successors, (6244), 3831 states have internal predecessors, (6244), 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) [2021-11-09 08:36:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 6244 transitions. [2021-11-09 08:36:48,447 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 6244 transitions. Word has length 66 [2021-11-09 08:36:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:48,448 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 6244 transitions. [2021-11-09 08:36:48,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) [2021-11-09 08:36:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 6244 transitions. [2021-11-09 08:36:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 08:36:48,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:48,449 INFO L513 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] [2021-11-09 08:36:48,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:36:48,452 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-11-09 08:36:48,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:48,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083445250] [2021-11-09 08:36:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:48,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:48,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:48,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083445250] [2021-11-09 08:36:48,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083445250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:48,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:48,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:36:48,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125504996] [2021-11-09 08:36:48,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:36:48,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:36:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:36:48,584 INFO L87 Difference]: Start difference. First operand 3832 states and 6244 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-09 08:36:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:48,975 INFO L93 Difference]: Finished difference Result 5558 states and 8746 transitions. [2021-11-09 08:36:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:36:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 67 [2021-11-09 08:36:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:49,018 INFO L225 Difference]: With dead ends: 5558 [2021-11-09 08:36:49,018 INFO L226 Difference]: Without dead ends: 5556 [2021-11-09 08:36:49,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:36:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-11-09 08:36:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2021-11-09 08:36:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3926 states have (on average 1.6107997962302598) internal successors, (6324), 3927 states have internal predecessors, (6324), 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) [2021-11-09 08:36:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6324 transitions. [2021-11-09 08:36:49,320 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6324 transitions. Word has length 67 [2021-11-09 08:36:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:49,321 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 6324 transitions. [2021-11-09 08:36:49,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-09 08:36:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6324 transitions. [2021-11-09 08:36:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 08:36:49,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:49,323 INFO L513 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] [2021-11-09 08:36:49,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:36:49,323 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-11-09 08:36:49,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:49,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836998395] [2021-11-09 08:36:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:49,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:49,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:49,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836998395] [2021-11-09 08:36:49,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836998395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:49,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:49,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:36:49,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125032907] [2021-11-09 08:36:49,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:49,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:49,378 INFO L87 Difference]: Start difference. First operand 3928 states and 6324 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2021-11-09 08:36:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:49,652 INFO L93 Difference]: Finished difference Result 6367 states and 9914 transitions. [2021-11-09 08:36:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 [2021-11-09 08:36:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:49,665 INFO L225 Difference]: With dead ends: 6367 [2021-11-09 08:36:49,666 INFO L226 Difference]: Without dead ends: 5020 [2021-11-09 08:36:49,669 INFO L786 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 [2021-11-09 08:36:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2021-11-09 08:36:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2021-11-09 08:36:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.5705741626794258) internal successors, (7878), 5017 states have internal predecessors, (7878), 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) [2021-11-09 08:36:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7878 transitions. [2021-11-09 08:36:50,016 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7878 transitions. Word has length 68 [2021-11-09 08:36:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:50,016 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 7878 transitions. [2021-11-09 08:36:50,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2021-11-09 08:36:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7878 transitions. [2021-11-09 08:36:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 08:36:50,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:50,021 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:50,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:36:50,021 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2021-11-09 08:36:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:50,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290173799] [2021-11-09 08:36:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:36:50,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:50,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290173799] [2021-11-09 08:36:50,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290173799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:50,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:50,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:36:50,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818802157] [2021-11-09 08:36:50,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:50,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:50,143 INFO L87 Difference]: Start difference. First operand 5018 states and 7878 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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) [2021-11-09 08:36:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:51,529 INFO L93 Difference]: Finished difference Result 23094 states and 33980 transitions. [2021-11-09 08:36:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:36:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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 94 [2021-11-09 08:36:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:51,581 INFO L225 Difference]: With dead ends: 23094 [2021-11-09 08:36:51,581 INFO L226 Difference]: Without dead ends: 19620 [2021-11-09 08:36:51,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2021-11-09 08:36:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2021-11-09 08:36:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.514373232799246) internal successors, (12854), 8489 states have internal predecessors, (12854), 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) [2021-11-09 08:36:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12854 transitions. [2021-11-09 08:36:52,312 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12854 transitions. Word has length 94 [2021-11-09 08:36:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:52,312 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 12854 transitions. [2021-11-09 08:36:52,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 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) [2021-11-09 08:36:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12854 transitions. [2021-11-09 08:36:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 08:36:52,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:52,317 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:52,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:36:52,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2021-11-09 08:36:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:52,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194274761] [2021-11-09 08:36:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:52,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 08:36:52,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:52,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194274761] [2021-11-09 08:36:52,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194274761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:52,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:52,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:36:52,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007314559] [2021-11-09 08:36:52,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:52,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:52,428 INFO L87 Difference]: Start difference. First operand 8490 states and 12854 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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) [2021-11-09 08:36:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:53,861 INFO L93 Difference]: Finished difference Result 26566 states and 38956 transitions. [2021-11-09 08:36:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:36:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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 94 [2021-11-09 08:36:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:53,920 INFO L225 Difference]: With dead ends: 26566 [2021-11-09 08:36:53,920 INFO L226 Difference]: Without dead ends: 23092 [2021-11-09 08:36:53,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2021-11-09 08:36:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2021-11-09 08:36:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13706 states, 13704 states have (on average 1.4797139521307647) internal successors, (20278), 13705 states have internal predecessors, (20278), 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) [2021-11-09 08:36:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 20278 transitions. [2021-11-09 08:36:54,950 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 20278 transitions. Word has length 94 [2021-11-09 08:36:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:54,951 INFO L470 AbstractCegarLoop]: Abstraction has 13706 states and 20278 transitions. [2021-11-09 08:36:54,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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) [2021-11-09 08:36:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 20278 transitions. [2021-11-09 08:36:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 08:36:54,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:54,959 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:54,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:36:54,960 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2021-11-09 08:36:54,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:54,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482105437] [2021-11-09 08:36:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:54,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:36:55,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:55,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482105437] [2021-11-09 08:36:55,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482105437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:55,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:55,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:36:55,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857312832] [2021-11-09 08:36:55,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:55,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:55,069 INFO L87 Difference]: Start difference. First operand 13706 states and 20278 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2021-11-09 08:36:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:56,566 INFO L93 Difference]: Finished difference Result 30038 states and 43932 transitions. [2021-11-09 08:36:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:36:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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 94 [2021-11-09 08:36:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:56,645 INFO L225 Difference]: With dead ends: 30038 [2021-11-09 08:36:56,645 INFO L226 Difference]: Without dead ends: 26564 [2021-11-09 08:36:56,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2021-11-09 08:36:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2021-11-09 08:36:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17178 states, 17176 states have (on average 1.4703074056823475) internal successors, (25254), 17177 states have internal predecessors, (25254), 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) [2021-11-09 08:36:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 25254 transitions. [2021-11-09 08:36:57,793 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 25254 transitions. Word has length 94 [2021-11-09 08:36:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:57,793 INFO L470 AbstractCegarLoop]: Abstraction has 17178 states and 25254 transitions. [2021-11-09 08:36:57,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2021-11-09 08:36:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 25254 transitions. [2021-11-09 08:36:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 08:36:57,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:57,800 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:57,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:36:57,800 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2021-11-09 08:36:57,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:57,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467057140] [2021-11-09 08:36:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:57,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:36:57,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:57,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467057140] [2021-11-09 08:36:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467057140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:57,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:57,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:36:57,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063182754] [2021-11-09 08:36:57,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:36:57,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:36:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:36:57,917 INFO L87 Difference]: Start difference. First operand 17178 states and 25254 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2021-11-09 08:36:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:59,459 INFO L93 Difference]: Finished difference Result 33510 states and 48908 transitions. [2021-11-09 08:36:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:36:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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 94 [2021-11-09 08:36:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:59,545 INFO L225 Difference]: With dead ends: 33510 [2021-11-09 08:36:59,545 INFO L226 Difference]: Without dead ends: 30036 [2021-11-09 08:36:59,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:36:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2021-11-09 08:37:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2021-11-09 08:37:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20650 states, 20648 states have (on average 1.4640643161565285) internal successors, (30230), 20649 states have internal predecessors, (30230), 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) [2021-11-09 08:37:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 30230 transitions. [2021-11-09 08:37:01,063 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 30230 transitions. Word has length 94 [2021-11-09 08:37:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:01,064 INFO L470 AbstractCegarLoop]: Abstraction has 20650 states and 30230 transitions. [2021-11-09 08:37:01,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2021-11-09 08:37:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 30230 transitions. [2021-11-09 08:37:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 08:37:01,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:01,072 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:01,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:37:01,073 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2021-11-09 08:37:01,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:01,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533133469] [2021-11-09 08:37:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:01,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:01,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:01,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533133469] [2021-11-09 08:37:01,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533133469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:01,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:01,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:01,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687618408] [2021-11-09 08:37:01,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:01,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:01,147 INFO L87 Difference]: Start difference. First operand 20650 states and 30230 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-09 08:37:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:02,055 INFO L93 Difference]: Finished difference Result 34059 states and 49627 transitions. [2021-11-09 08:37:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-11-09 08:37:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:02,086 INFO L225 Difference]: With dead ends: 34059 [2021-11-09 08:37:02,086 INFO L226 Difference]: Without dead ends: 14953 [2021-11-09 08:37:02,110 INFO L786 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 [2021-11-09 08:37:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14953 states. [2021-11-09 08:37:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14953 to 14951. [2021-11-09 08:37:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14951 states, 14949 states have (on average 1.476486721519834) internal successors, (22072), 14950 states have internal predecessors, (22072), 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) [2021-11-09 08:37:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 22072 transitions. [2021-11-09 08:37:03,064 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 22072 transitions. Word has length 96 [2021-11-09 08:37:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:03,065 INFO L470 AbstractCegarLoop]: Abstraction has 14951 states and 22072 transitions. [2021-11-09 08:37:03,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-09 08:37:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 22072 transitions. [2021-11-09 08:37:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 08:37:03,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:03,070 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:03,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:37:03,071 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2021-11-09 08:37:03,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:03,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491637060] [2021-11-09 08:37:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:03,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:37:03,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:03,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491637060] [2021-11-09 08:37:03,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491637060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:03,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:03,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:37:03,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013540141] [2021-11-09 08:37:03,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:03,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:03,166 INFO L87 Difference]: Start difference. First operand 14951 states and 22072 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2021-11-09 08:37:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:04,607 INFO L93 Difference]: Finished difference Result 27123 states and 39678 transitions. [2021-11-09 08:37:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:37:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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 96 [2021-11-09 08:37:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:04,657 INFO L225 Difference]: With dead ends: 27123 [2021-11-09 08:37:04,657 INFO L226 Difference]: Without dead ends: 24689 [2021-11-09 08:37:04,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:37:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24689 states. [2021-11-09 08:37:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24689 to 17383. [2021-11-09 08:37:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17383 states, 17381 states have (on average 1.4705713135032508) internal successors, (25560), 17382 states have internal predecessors, (25560), 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) [2021-11-09 08:37:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17383 states to 17383 states and 25560 transitions. [2021-11-09 08:37:05,753 INFO L78 Accepts]: Start accepts. Automaton has 17383 states and 25560 transitions. Word has length 96 [2021-11-09 08:37:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:05,753 INFO L470 AbstractCegarLoop]: Abstraction has 17383 states and 25560 transitions. [2021-11-09 08:37:05,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2021-11-09 08:37:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 17383 states and 25560 transitions. [2021-11-09 08:37:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:37:05,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:05,760 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:05,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:37:05,760 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:05,761 INFO L85 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2021-11-09 08:37:05,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:05,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340460883] [2021-11-09 08:37:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:05,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:05,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:05,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340460883] [2021-11-09 08:37:05,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340460883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:05,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:05,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:05,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196828094] [2021-11-09 08:37:05,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:05,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:05,820 INFO L87 Difference]: Start difference. First operand 17383 states and 25560 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-09 08:37:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:06,331 INFO L93 Difference]: Finished difference Result 25291 states and 36898 transitions. [2021-11-09 08:37:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-09 08:37:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:06,354 INFO L225 Difference]: With dead ends: 25291 [2021-11-09 08:37:06,354 INFO L226 Difference]: Without dead ends: 9481 [2021-11-09 08:37:06,370 INFO L786 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 [2021-11-09 08:37:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2021-11-09 08:37:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 9479. [2021-11-09 08:37:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9479 states, 9477 states have (on average 1.4899229714044528) internal successors, (14120), 9478 states have internal predecessors, (14120), 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) [2021-11-09 08:37:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9479 states to 9479 states and 14120 transitions. [2021-11-09 08:37:06,908 INFO L78 Accepts]: Start accepts. Automaton has 9479 states and 14120 transitions. Word has length 97 [2021-11-09 08:37:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:06,908 INFO L470 AbstractCegarLoop]: Abstraction has 9479 states and 14120 transitions. [2021-11-09 08:37:06,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-09 08:37:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9479 states and 14120 transitions. [2021-11-09 08:37:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:37:06,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:06,954 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:06,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:37:06,955 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2021-11-09 08:37:06,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:06,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555833305] [2021-11-09 08:37:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:06,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:07,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:07,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555833305] [2021-11-09 08:37:07,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555833305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:07,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:07,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:07,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378905014] [2021-11-09 08:37:07,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:07,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:07,018 INFO L87 Difference]: Start difference. First operand 9479 states and 14120 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-09 08:37:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:07,450 INFO L93 Difference]: Finished difference Result 13435 states and 19738 transitions. [2021-11-09 08:37:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-09 08:37:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:07,462 INFO L225 Difference]: With dead ends: 13435 [2021-11-09 08:37:07,462 INFO L226 Difference]: Without dead ends: 5529 [2021-11-09 08:37:07,473 INFO L786 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 [2021-11-09 08:37:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2021-11-09 08:37:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5527. [2021-11-09 08:37:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5525 states have (on average 1.5297737556561086) internal successors, (8452), 5526 states have internal predecessors, (8452), 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) [2021-11-09 08:37:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 8452 transitions. [2021-11-09 08:37:07,912 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 8452 transitions. Word has length 97 [2021-11-09 08:37:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:07,913 INFO L470 AbstractCegarLoop]: Abstraction has 5527 states and 8452 transitions. [2021-11-09 08:37:07,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-09 08:37:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 8452 transitions. [2021-11-09 08:37:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:37:07,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:07,916 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:07,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 08:37:07,917 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2021-11-09 08:37:07,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:07,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249964652] [2021-11-09 08:37:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:07,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:07,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:07,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249964652] [2021-11-09 08:37:07,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249964652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:07,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:07,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:07,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84256100] [2021-11-09 08:37:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:07,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:07,997 INFO L87 Difference]: Start difference. First operand 5527 states and 8452 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-09 08:37:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:08,225 INFO L93 Difference]: Finished difference Result 7507 states and 11236 transitions. [2021-11-09 08:37:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-09 08:37:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:08,233 INFO L225 Difference]: With dead ends: 7507 [2021-11-09 08:37:08,233 INFO L226 Difference]: Without dead ends: 3553 [2021-11-09 08:37:08,237 INFO L786 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 [2021-11-09 08:37:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-11-09 08:37:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3551. [2021-11-09 08:37:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3549 states have (on average 1.5903071287686672) internal successors, (5644), 3550 states have internal predecessors, (5644), 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) [2021-11-09 08:37:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5644 transitions. [2021-11-09 08:37:08,469 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5644 transitions. Word has length 97 [2021-11-09 08:37:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 5644 transitions. [2021-11-09 08:37:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-09 08:37:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5644 transitions. [2021-11-09 08:37:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:37:08,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:08,473 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:08,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:37:08,473 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2021-11-09 08:37:08,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:08,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979267726] [2021-11-09 08:37:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:08,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:08,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:08,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979267726] [2021-11-09 08:37:08,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979267726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:08,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977802789] [2021-11-09 08:37:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:08,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:08,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:08,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:37:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:37:08,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:37:09,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977802789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:09,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:09,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2021-11-09 08:37:09,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78308801] [2021-11-09 08:37:09,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:37:09,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:09,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:37:09,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:37:09,765 INFO L87 Difference]: Start difference. First operand 3551 states and 5644 transitions. Second operand has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 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) [2021-11-09 08:37:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:13,765 INFO L93 Difference]: Finished difference Result 16453 states and 23424 transitions. [2021-11-09 08:37:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:37:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 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 97 [2021-11-09 08:37:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:13,799 INFO L225 Difference]: With dead ends: 16453 [2021-11-09 08:37:13,799 INFO L226 Difference]: Without dead ends: 14475 [2021-11-09 08:37:13,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:37:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14475 states. [2021-11-09 08:37:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14475 to 8424. [2021-11-09 08:37:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8424 states, 8422 states have (on average 1.4388506293042034) internal successors, (12118), 8423 states have internal predecessors, (12118), 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) [2021-11-09 08:37:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8424 states to 8424 states and 12118 transitions. [2021-11-09 08:37:14,444 INFO L78 Accepts]: Start accepts. Automaton has 8424 states and 12118 transitions. Word has length 97 [2021-11-09 08:37:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:14,444 INFO L470 AbstractCegarLoop]: Abstraction has 8424 states and 12118 transitions. [2021-11-09 08:37:14,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 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) [2021-11-09 08:37:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8424 states and 12118 transitions. [2021-11-09 08:37:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:37:14,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:14,447 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:14,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:14,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:37:14,662 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -713626361, now seen corresponding path program 1 times [2021-11-09 08:37:14,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:14,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775914252] [2021-11-09 08:37:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:14,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:14,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:14,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775914252] [2021-11-09 08:37:14,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775914252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:14,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:14,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:14,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393008167] [2021-11-09 08:37:14,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:14,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:14,731 INFO L87 Difference]: Start difference. First operand 8424 states and 12118 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2021-11-09 08:37:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:15,112 INFO L93 Difference]: Finished difference Result 11443 states and 16237 transitions. [2021-11-09 08:37:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2021-11-09 08:37:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:15,118 INFO L225 Difference]: With dead ends: 11443 [2021-11-09 08:37:15,118 INFO L226 Difference]: Without dead ends: 5554 [2021-11-09 08:37:15,121 INFO L786 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 [2021-11-09 08:37:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-11-09 08:37:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 5552. [2021-11-09 08:37:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5550 states have (on average 1.469009009009009) internal successors, (8153), 5551 states have internal predecessors, (8153), 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) [2021-11-09 08:37:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 8153 transitions. [2021-11-09 08:37:15,420 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 8153 transitions. Word has length 98 [2021-11-09 08:37:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:15,421 INFO L470 AbstractCegarLoop]: Abstraction has 5552 states and 8153 transitions. [2021-11-09 08:37:15,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2021-11-09 08:37:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 8153 transitions. [2021-11-09 08:37:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:37:15,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:15,423 INFO L513 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, 1, 1, 1, 1] [2021-11-09 08:37:15,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 08:37:15,424 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1294468783, now seen corresponding path program 1 times [2021-11-09 08:37:15,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:15,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447817851] [2021-11-09 08:37:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:15,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:15,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:15,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447817851] [2021-11-09 08:37:15,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447817851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:15,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828357756] [2021-11-09 08:37:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:15,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:15,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:15,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:37:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:37:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828357756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:17,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:17,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2021-11-09 08:37:17,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121957016] [2021-11-09 08:37:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:37:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:17,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:37:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:37:17,231 INFO L87 Difference]: Start difference. First operand 5552 states and 8153 transitions. Second operand has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 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) [2021-11-09 08:37:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:25,561 INFO L93 Difference]: Finished difference Result 49824 states and 66123 transitions. [2021-11-09 08:37:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 08:37:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 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 98 [2021-11-09 08:37:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:25,609 INFO L225 Difference]: With dead ends: 49824 [2021-11-09 08:37:25,610 INFO L226 Difference]: Without dead ends: 46036 [2021-11-09 08:37:25,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2764 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1483, Invalid=7447, Unknown=0, NotChecked=0, Total=8930 [2021-11-09 08:37:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46036 states. [2021-11-09 08:37:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46036 to 28776. [2021-11-09 08:37:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28776 states, 28774 states have (on average 1.3309585042051852) internal successors, (38297), 28775 states have internal predecessors, (38297), 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) [2021-11-09 08:37:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28776 states to 28776 states and 38297 transitions. [2021-11-09 08:37:28,052 INFO L78 Accepts]: Start accepts. Automaton has 28776 states and 38297 transitions. Word has length 98 [2021-11-09 08:37:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:28,052 INFO L470 AbstractCegarLoop]: Abstraction has 28776 states and 38297 transitions. [2021-11-09 08:37:28,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 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) [2021-11-09 08:37:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28776 states and 38297 transitions. [2021-11-09 08:37:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:37:28,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:28,057 INFO L513 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, 1, 1, 1, 1] [2021-11-09 08:37:28,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:28,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:28,270 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 730184847, now seen corresponding path program 1 times [2021-11-09 08:37:28,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:28,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170383236] [2021-11-09 08:37:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:28,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:37:28,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:28,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170383236] [2021-11-09 08:37:28,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170383236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:28,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:28,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:37:28,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477255344] [2021-11-09 08:37:28,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:37:28,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:37:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:28,471 INFO L87 Difference]: Start difference. First operand 28776 states and 38297 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-11-09 08:37:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:30,334 INFO L93 Difference]: Finished difference Result 48253 states and 63645 transitions. [2021-11-09 08:37:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:37:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 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 98 [2021-11-09 08:37:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:30,357 INFO L225 Difference]: With dead ends: 48253 [2021-11-09 08:37:30,357 INFO L226 Difference]: Without dead ends: 21588 [2021-11-09 08:37:30,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:37:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21588 states. [2021-11-09 08:37:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21588 to 21588. [2021-11-09 08:37:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21588 states, 21586 states have (on average 1.31877142592421) internal successors, (28467), 21587 states have internal predecessors, (28467), 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) [2021-11-09 08:37:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21588 states to 21588 states and 28467 transitions. [2021-11-09 08:37:32,590 INFO L78 Accepts]: Start accepts. Automaton has 21588 states and 28467 transitions. Word has length 98 [2021-11-09 08:37:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:32,590 INFO L470 AbstractCegarLoop]: Abstraction has 21588 states and 28467 transitions. [2021-11-09 08:37:32,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-11-09 08:37:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21588 states and 28467 transitions. [2021-11-09 08:37:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:37:32,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:32,593 INFO L513 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, 1, 1, 1, 1] [2021-11-09 08:37:32,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 08:37:32,594 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 89614703, now seen corresponding path program 1 times [2021-11-09 08:37:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:32,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772461971] [2021-11-09 08:37:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:32,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:37:32,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:32,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772461971] [2021-11-09 08:37:32,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772461971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:32,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:32,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:37:32,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896668972] [2021-11-09 08:37:32,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:37:32,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:37:32,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:32,660 INFO L87 Difference]: Start difference. First operand 21588 states and 28467 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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) [2021-11-09 08:37:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:34,208 INFO L93 Difference]: Finished difference Result 36526 states and 47600 transitions. [2021-11-09 08:37:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:37:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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 98 [2021-11-09 08:37:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:34,227 INFO L225 Difference]: With dead ends: 36526 [2021-11-09 08:37:34,227 INFO L226 Difference]: Without dead ends: 16687 [2021-11-09 08:37:34,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:37:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16687 states. [2021-11-09 08:37:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16687 to 16687. [2021-11-09 08:37:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16687 states, 16685 states have (on average 1.3156128258915194) internal successors, (21951), 16686 states have internal predecessors, (21951), 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) [2021-11-09 08:37:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16687 states to 16687 states and 21951 transitions. [2021-11-09 08:37:35,823 INFO L78 Accepts]: Start accepts. Automaton has 16687 states and 21951 transitions. Word has length 98 [2021-11-09 08:37:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:35,823 INFO L470 AbstractCegarLoop]: Abstraction has 16687 states and 21951 transitions. [2021-11-09 08:37:35,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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) [2021-11-09 08:37:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 16687 states and 21951 transitions. [2021-11-09 08:37:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:37:35,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:35,825 INFO L513 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, 1, 1, 1, 1] [2021-11-09 08:37:35,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 08:37:35,825 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash 567553615, now seen corresponding path program 1 times [2021-11-09 08:37:35,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:35,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248589913] [2021-11-09 08:37:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:35,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:35,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:35,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248589913] [2021-11-09 08:37:35,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248589913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:35,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:35,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:37:35,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803960687] [2021-11-09 08:37:35,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:37:35,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:35,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:37:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:35,901 INFO L87 Difference]: Start difference. First operand 16687 states and 21951 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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) [2021-11-09 08:37:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:37,168 INFO L93 Difference]: Finished difference Result 28477 states and 36904 transitions. [2021-11-09 08:37:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:37:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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 98 [2021-11-09 08:37:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:37,187 INFO L225 Difference]: With dead ends: 28477 [2021-11-09 08:37:37,187 INFO L226 Difference]: Without dead ends: 13403 [2021-11-09 08:37:37,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:37:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13403 states. [2021-11-09 08:37:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13403 to 13403. [2021-11-09 08:37:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13403 states, 13401 states have (on average 1.320946198044922) internal successors, (17702), 13402 states have internal predecessors, (17702), 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) [2021-11-09 08:37:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 17702 transitions. [2021-11-09 08:37:38,542 INFO L78 Accepts]: Start accepts. Automaton has 13403 states and 17702 transitions. Word has length 98 [2021-11-09 08:37:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:38,542 INFO L470 AbstractCegarLoop]: Abstraction has 13403 states and 17702 transitions. [2021-11-09 08:37:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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) [2021-11-09 08:37:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 13403 states and 17702 transitions. [2021-11-09 08:37:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 08:37:38,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:38,544 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-09 08:37:38,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 08:37:38,544 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1199123718, now seen corresponding path program 1 times [2021-11-09 08:37:38,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:38,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620515849] [2021-11-09 08:37:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:38,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:38,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:38,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620515849] [2021-11-09 08:37:38,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620515849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:38,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752235404] [2021-11-09 08:37:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:38,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:38,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:38,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:38,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:37:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:37:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:40,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752235404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:40,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:40,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-09 08:37:40,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864512703] [2021-11-09 08:37:40,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:37:40,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:37:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:37:40,298 INFO L87 Difference]: Start difference. First operand 13403 states and 17702 transitions. Second operand has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 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) [2021-11-09 08:37:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:55,601 INFO L93 Difference]: Finished difference Result 129776 states and 166103 transitions. [2021-11-09 08:37:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:37:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 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 99 [2021-11-09 08:37:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:55,784 INFO L225 Difference]: With dead ends: 129776 [2021-11-09 08:37:55,785 INFO L226 Difference]: Without dead ends: 118399 [2021-11-09 08:37:55,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=742, Invalid=3040, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:37:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118399 states. [2021-11-09 08:38:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118399 to 66597. [2021-11-09 08:38:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66597 states, 66595 states have (on average 1.2493280276297019) internal successors, (83199), 66596 states have internal predecessors, (83199), 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) [2021-11-09 08:38:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66597 states to 66597 states and 83199 transitions. [2021-11-09 08:38:04,991 INFO L78 Accepts]: Start accepts. Automaton has 66597 states and 83199 transitions. Word has length 99 [2021-11-09 08:38:04,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:04,991 INFO L470 AbstractCegarLoop]: Abstraction has 66597 states and 83199 transitions. [2021-11-09 08:38:04,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 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) [2021-11-09 08:38:04,991 INFO L276 IsEmpty]: Start isEmpty. Operand 66597 states and 83199 transitions. [2021-11-09 08:38:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 08:38:04,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:04,995 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-09 08:38:05,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:05,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee4a3a89-8d1b-49a2-9f66-26c26c430f63/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:38:05,196 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1535817218, now seen corresponding path program 1 times [2021-11-09 08:38:05,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:05,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202695829] [2021-11-09 08:38:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:05,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 08:38:05,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:05,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202695829] [2021-11-09 08:38:05,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202695829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:05,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:05,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:38:05,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854017126] [2021-11-09 08:38:05,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:38:05,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:05,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:38:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:38:05,480 INFO L87 Difference]: Start difference. First operand 66597 states and 83199 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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) [2021-11-09 08:38:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:12,409 INFO L93 Difference]: Finished difference Result 116504 states and 145424 transitions. [2021-11-09 08:38:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:38:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 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 99 [2021-11-09 08:38:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:12,487 INFO L225 Difference]: With dead ends: 116504 [2021-11-09 08:38:12,487 INFO L226 Difference]: Without dead ends: 51510 [2021-11-09 08:38:12,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:38:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51510 states.