./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN --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 e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:29:38,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:29:38,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:29:38,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:29:38,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:29:38,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:29:38,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:29:38,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:29:38,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:29:38,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:29:38,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:29:38,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:29:38,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:29:38,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:29:38,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:29:38,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:29:38,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:29:38,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:29:38,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:29:38,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:29:38,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:29:38,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:29:38,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:29:38,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:29:38,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:29:38,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:29:38,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:29:38,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:29:38,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:29:38,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:29:38,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:29:38,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:29:38,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:29:38,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:29:38,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:29:38,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:29:38,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:29:38,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:29:38,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:29:38,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:29:38,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:29:38,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:29:38,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:29:38,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:29:38,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:29:38,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:29:38,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:29:38,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:29:38,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:29:38,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:29:38,475 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:29:38,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:29:38,476 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:29:38,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:29:38,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:29:38,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:29:38,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:29:38,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:29:38,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:29:38,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:29:38,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:29:38,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:29:38,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:29:38,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:29:38,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:29:38,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:29:38,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:29:38,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:29:38,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:29:38,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:29:38,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:29:38,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:29:38,481 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:29:38,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:29:38,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:29:38,481 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_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da [2022-11-20 09:29:38,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:29:38,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:29:38,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:29:38,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:29:38,745 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:29:38,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2022-11-20 09:29:41,675 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:29:42,108 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:29:42,109 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2022-11-20 09:29:42,127 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/data/ef4c749e5/f1c5eca2b48a4bbd83bbfbafdac8534a/FLAGa9f42ad62 [2022-11-20 09:29:42,148 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/data/ef4c749e5/f1c5eca2b48a4bbd83bbfbafdac8534a [2022-11-20 09:29:42,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:29:42,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:29:42,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:29:42,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:29:42,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:29:42,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:42" (1/1) ... [2022-11-20 09:29:42,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43edf8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:42, skipping insertion in model container [2022-11-20 09:29:42,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:42" (1/1) ... [2022-11-20 09:29:42,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:29:42,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:29:42,825 WARN L237 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_d85d566e-9426-4d92-bc2c-921156893bd1/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2022-11-20 09:29:42,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:29:42,872 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:29:43,147 WARN L237 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_d85d566e-9426-4d92-bc2c-921156893bd1/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2022-11-20 09:29:43,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:29:43,186 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:29:43,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43 WrapperNode [2022-11-20 09:29:43,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:29:43,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:29:43,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:29:43,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:29:43,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,335 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-20 09:29:43,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:29:43,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:29:43,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:29:43,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:29:43,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,441 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:29:43,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:29:43,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:29:43,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:29:43,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (1/1) ... [2022-11-20 09:29:43,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:29:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:43,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:29:43,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:29:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:29:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:29:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:29:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:29:43,607 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:29:43,609 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:29:45,618 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:29:45,638 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:29:45,638 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 09:29:45,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:45 BoogieIcfgContainer [2022-11-20 09:29:45,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:29:45,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:29:45,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:29:45,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:29:45,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:29:42" (1/3) ... [2022-11-20 09:29:45,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681d0f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:45, skipping insertion in model container [2022-11-20 09:29:45,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:43" (2/3) ... [2022-11-20 09:29:45,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681d0f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:45, skipping insertion in model container [2022-11-20 09:29:45,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:45" (3/3) ... [2022-11-20 09:29:45,655 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2022-11-20 09:29:45,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:29:45,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:29:45,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:29:45,768 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44b470cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:29:45,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:29:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2022-11-20 09:29:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 09:29:45,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:45,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:45,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1090968285, now seen corresponding path program 1 times [2022-11-20 09:29:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:45,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352967311] [2022-11-20 09:29:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:46,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:46,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352967311] [2022-11-20 09:29:46,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352967311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:46,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:46,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115263989] [2022-11-20 09:29:46,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:46,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:46,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:46,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:46,834 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-11-20 09:29:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:48,092 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-11-20 09:29:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2022-11-20 09:29:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:48,114 INFO L225 Difference]: With dead ends: 836 [2022-11-20 09:29:48,116 INFO L226 Difference]: Without dead ends: 457 [2022-11-20 09:29:48,124 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:48,129 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 136 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:48,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 09:29:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-20 09:29:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-11-20 09:29:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 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) [2022-11-20 09:29:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-11-20 09:29:48,210 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 147 [2022-11-20 09:29:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:48,214 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-11-20 09:29:48,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-11-20 09:29:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-11-20 09:29:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-20 09:29:48,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:48,225 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:48,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:29:48,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash -780294121, now seen corresponding path program 1 times [2022-11-20 09:29:48,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:48,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855735476] [2022-11-20 09:29:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:48,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:48,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855735476] [2022-11-20 09:29:48,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855735476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:48,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:48,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374224851] [2022-11-20 09:29:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:48,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:48,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:48,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:48,718 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-20 09:29:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:49,674 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-11-20 09:29:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-11-20 09:29:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:49,687 INFO L225 Difference]: With dead ends: 1340 [2022-11-20 09:29:49,688 INFO L226 Difference]: Without dead ends: 891 [2022-11-20 09:29:49,694 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:49,696 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:49,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-20 09:29:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-11-20 09:29:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 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) [2022-11-20 09:29:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-11-20 09:29:49,736 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 153 [2022-11-20 09:29:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:49,736 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-11-20 09:29:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-20 09:29:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-11-20 09:29:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-20 09:29:49,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:49,740 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:49,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:29:49,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1937089801, now seen corresponding path program 1 times [2022-11-20 09:29:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:49,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441175392] [2022-11-20 09:29:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:50,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441175392] [2022-11-20 09:29:50,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441175392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:50,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424369338] [2022-11-20 09:29:50,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:50,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:50,085 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-11-20 09:29:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:51,079 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-11-20 09:29:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 157 [2022-11-20 09:29:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:51,086 INFO L225 Difference]: With dead ends: 2605 [2022-11-20 09:29:51,086 INFO L226 Difference]: Without dead ends: 1721 [2022-11-20 09:29:51,087 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:51,088 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 234 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:51,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 124 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-20 09:29:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-11-20 09:29:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5017462165308497) internal successors, (2580), 1718 states have internal predecessors, (2580), 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) [2022-11-20 09:29:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2580 transitions. [2022-11-20 09:29:51,129 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2580 transitions. Word has length 157 [2022-11-20 09:29:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:51,129 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2580 transitions. [2022-11-20 09:29:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-11-20 09:29:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2580 transitions. [2022-11-20 09:29:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 09:29:51,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:51,134 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:51,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:29:51,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2144550674, now seen corresponding path program 1 times [2022-11-20 09:29:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:51,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831197435] [2022-11-20 09:29:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:51,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831197435] [2022-11-20 09:29:51,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831197435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:51,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:51,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344031795] [2022-11-20 09:29:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:51,477 INFO L87 Difference]: Start difference. First operand 1719 states and 2580 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-11-20 09:29:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:52,468 INFO L93 Difference]: Finished difference Result 5126 states and 7705 transitions. [2022-11-20 09:29:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:52,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 159 [2022-11-20 09:29:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:52,481 INFO L225 Difference]: With dead ends: 5126 [2022-11-20 09:29:52,482 INFO L226 Difference]: Without dead ends: 3409 [2022-11-20 09:29:52,486 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:52,497 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:52,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 181 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2022-11-20 09:29:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3397. [2022-11-20 09:29:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 1.4840989399293287) internal successors, (5040), 3396 states have internal predecessors, (5040), 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) [2022-11-20 09:29:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5040 transitions. [2022-11-20 09:29:52,593 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5040 transitions. Word has length 159 [2022-11-20 09:29:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:52,593 INFO L495 AbstractCegarLoop]: Abstraction has 3397 states and 5040 transitions. [2022-11-20 09:29:52,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-11-20 09:29:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5040 transitions. [2022-11-20 09:29:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-20 09:29:52,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:52,603 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:52,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:29:52,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash 741517523, now seen corresponding path program 1 times [2022-11-20 09:29:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016306942] [2022-11-20 09:29:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016306942] [2022-11-20 09:29:52,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016306942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:52,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:52,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415598804] [2022-11-20 09:29:52,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:52,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:52,822 INFO L87 Difference]: Start difference. First operand 3397 states and 5040 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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) [2022-11-20 09:29:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:53,753 INFO L93 Difference]: Finished difference Result 10089 states and 14975 transitions. [2022-11-20 09:29:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 161 [2022-11-20 09:29:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:53,776 INFO L225 Difference]: With dead ends: 10089 [2022-11-20 09:29:53,776 INFO L226 Difference]: Without dead ends: 6694 [2022-11-20 09:29:53,781 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:53,782 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:53,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 151 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2022-11-20 09:29:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6687. [2022-11-20 09:29:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6686 states have (on average 1.4131020041878553) internal successors, (9448), 6686 states have internal predecessors, (9448), 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) [2022-11-20 09:29:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 9448 transitions. [2022-11-20 09:29:53,927 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 9448 transitions. Word has length 161 [2022-11-20 09:29:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:53,928 INFO L495 AbstractCegarLoop]: Abstraction has 6687 states and 9448 transitions. [2022-11-20 09:29:53,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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) [2022-11-20 09:29:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 9448 transitions. [2022-11-20 09:29:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-20 09:29:53,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:53,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:53,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:29:53,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1080734270, now seen corresponding path program 1 times [2022-11-20 09:29:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:53,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627186779] [2022-11-20 09:29:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:29:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627186779] [2022-11-20 09:29:54,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627186779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:54,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:54,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757755224] [2022-11-20 09:29:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:54,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:54,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:54,356 INFO L87 Difference]: Start difference. First operand 6687 states and 9448 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-11-20 09:29:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:55,358 INFO L93 Difference]: Finished difference Result 19868 states and 28068 transitions. [2022-11-20 09:29:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 164 [2022-11-20 09:29:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:55,421 INFO L225 Difference]: With dead ends: 19868 [2022-11-20 09:29:55,422 INFO L226 Difference]: Without dead ends: 13183 [2022-11-20 09:29:55,429 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:55,430 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:55,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 194 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13183 states. [2022-11-20 09:29:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13183 to 13183. [2022-11-20 09:29:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13183 states, 13182 states have (on average 1.2726445152480654) internal successors, (16776), 13182 states have internal predecessors, (16776), 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) [2022-11-20 09:29:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13183 states to 13183 states and 16776 transitions. [2022-11-20 09:29:55,738 INFO L78 Accepts]: Start accepts. Automaton has 13183 states and 16776 transitions. Word has length 164 [2022-11-20 09:29:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:55,738 INFO L495 AbstractCegarLoop]: Abstraction has 13183 states and 16776 transitions. [2022-11-20 09:29:55,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-11-20 09:29:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13183 states and 16776 transitions. [2022-11-20 09:29:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-20 09:29:55,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:55,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:55,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:29:55,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:55,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2099805709, now seen corresponding path program 1 times [2022-11-20 09:29:55,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:55,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371816464] [2022-11-20 09:29:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:55,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:29:56,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:56,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371816464] [2022-11-20 09:29:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371816464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:56,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:29:56,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966656167] [2022-11-20 09:29:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:56,046 INFO L87 Difference]: Start difference. First operand 13183 states and 16776 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2022-11-20 09:29:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:57,250 INFO L93 Difference]: Finished difference Result 33713 states and 43627 transitions. [2022-11-20 09:29:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:57,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 168 [2022-11-20 09:29:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:57,285 INFO L225 Difference]: With dead ends: 33713 [2022-11-20 09:29:57,285 INFO L226 Difference]: Without dead ends: 20532 [2022-11-20 09:29:57,299 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:57,301 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:57,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 378 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 09:29:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20532 states. [2022-11-20 09:29:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20532 to 20522. [2022-11-20 09:29:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20522 states, 20521 states have (on average 1.2410701232883388) internal successors, (25468), 20521 states have internal predecessors, (25468), 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) [2022-11-20 09:29:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20522 states to 20522 states and 25468 transitions. [2022-11-20 09:29:57,754 INFO L78 Accepts]: Start accepts. Automaton has 20522 states and 25468 transitions. Word has length 168 [2022-11-20 09:29:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:57,755 INFO L495 AbstractCegarLoop]: Abstraction has 20522 states and 25468 transitions. [2022-11-20 09:29:57,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2022-11-20 09:29:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20522 states and 25468 transitions. [2022-11-20 09:29:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-20 09:29:57,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:57,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:29:57,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2077006845, now seen corresponding path program 1 times [2022-11-20 09:29:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:57,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857871043] [2022-11-20 09:29:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857871043] [2022-11-20 09:29:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857871043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:58,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:58,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:29:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283892581] [2022-11-20 09:29:58,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:58,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:58,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:58,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:58,148 INFO L87 Difference]: Start difference. First operand 20522 states and 25468 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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) [2022-11-20 09:29:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:59,290 INFO L93 Difference]: Finished difference Result 50471 states and 62495 transitions. [2022-11-20 09:29:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 175 [2022-11-20 09:29:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:59,344 INFO L225 Difference]: With dead ends: 50471 [2022-11-20 09:29:59,345 INFO L226 Difference]: Without dead ends: 29951 [2022-11-20 09:29:59,367 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:29:59,368 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:59,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 139 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2022-11-20 09:29:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 29926. [2022-11-20 09:29:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29926 states, 29925 states have (on average 1.2328153717627401) internal successors, (36892), 29925 states have internal predecessors, (36892), 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) [2022-11-20 09:30:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29926 states to 29926 states and 36892 transitions. [2022-11-20 09:30:00,059 INFO L78 Accepts]: Start accepts. Automaton has 29926 states and 36892 transitions. Word has length 175 [2022-11-20 09:30:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:00,061 INFO L495 AbstractCegarLoop]: Abstraction has 29926 states and 36892 transitions. [2022-11-20 09:30:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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) [2022-11-20 09:30:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 29926 states and 36892 transitions. [2022-11-20 09:30:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-20 09:30:00,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:00,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:00,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:30:00,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1608446206, now seen corresponding path program 1 times [2022-11-20 09:30:00,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:00,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471128476] [2022-11-20 09:30:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:00,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471128476] [2022-11-20 09:30:00,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471128476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:00,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:00,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729478865] [2022-11-20 09:30:00,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:00,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:00,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:00,595 INFO L87 Difference]: Start difference. First operand 29926 states and 36892 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2022-11-20 09:30:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:01,961 INFO L93 Difference]: Finished difference Result 72375 states and 90451 transitions. [2022-11-20 09:30:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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 177 [2022-11-20 09:30:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:02,047 INFO L225 Difference]: With dead ends: 72375 [2022-11-20 09:30:02,047 INFO L226 Difference]: Without dead ends: 42451 [2022-11-20 09:30:02,074 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:30:02,076 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:02,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 241 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 09:30:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states. [2022-11-20 09:30:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42451 to 42370. [2022-11-20 09:30:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42370 states, 42369 states have (on average 1.2558002313011871) internal successors, (53207), 42369 states have internal predecessors, (53207), 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) [2022-11-20 09:30:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42370 states to 42370 states and 53207 transitions. [2022-11-20 09:30:03,044 INFO L78 Accepts]: Start accepts. Automaton has 42370 states and 53207 transitions. Word has length 177 [2022-11-20 09:30:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:03,048 INFO L495 AbstractCegarLoop]: Abstraction has 42370 states and 53207 transitions. [2022-11-20 09:30:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2022-11-20 09:30:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 42370 states and 53207 transitions. [2022-11-20 09:30:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-20 09:30:03,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:03,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:03,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:30:03,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1903788300, now seen corresponding path program 1 times [2022-11-20 09:30:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883469448] [2022-11-20 09:30:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883469448] [2022-11-20 09:30:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883469448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:03,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:03,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428779279] [2022-11-20 09:30:03,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:03,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:03,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:03,628 INFO L87 Difference]: Start difference. First operand 42370 states and 53207 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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) [2022-11-20 09:30:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:05,249 INFO L93 Difference]: Finished difference Result 103360 states and 130038 transitions. [2022-11-20 09:30:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:05,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 181 [2022-11-20 09:30:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:05,394 INFO L225 Difference]: With dead ends: 103360 [2022-11-20 09:30:05,394 INFO L226 Difference]: Without dead ends: 61804 [2022-11-20 09:30:05,426 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:30:05,433 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:05,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 225 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:30:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61804 states. [2022-11-20 09:30:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61804 to 61780. [2022-11-20 09:30:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61780 states, 61779 states have (on average 1.2561550041276162) internal successors, (77604), 61779 states have internal predecessors, (77604), 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) [2022-11-20 09:30:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61780 states to 61780 states and 77604 transitions. [2022-11-20 09:30:06,695 INFO L78 Accepts]: Start accepts. Automaton has 61780 states and 77604 transitions. Word has length 181 [2022-11-20 09:30:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:06,696 INFO L495 AbstractCegarLoop]: Abstraction has 61780 states and 77604 transitions. [2022-11-20 09:30:06,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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) [2022-11-20 09:30:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 61780 states and 77604 transitions. [2022-11-20 09:30:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-20 09:30:06,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:06,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:06,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:30:06,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1538858248, now seen corresponding path program 1 times [2022-11-20 09:30:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:06,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335612581] [2022-11-20 09:30:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:06,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:30:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:07,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335612581] [2022-11-20 09:30:07,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335612581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:07,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:07,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033993736] [2022-11-20 09:30:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:30:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:30:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:07,271 INFO L87 Difference]: Start difference. First operand 61780 states and 77604 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 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) [2022-11-20 09:30:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:09,367 INFO L93 Difference]: Finished difference Result 164867 states and 207696 transitions. [2022-11-20 09:30:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 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 192 [2022-11-20 09:30:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:09,748 INFO L225 Difference]: With dead ends: 164867 [2022-11-20 09:30:09,748 INFO L226 Difference]: Without dead ends: 103901 [2022-11-20 09:30:09,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:09,818 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 521 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:09,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 533 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 09:30:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103901 states. [2022-11-20 09:30:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103901 to 103858. [2022-11-20 09:30:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103858 states, 103857 states have (on average 1.2354583706442512) internal successors, (128311), 103857 states have internal predecessors, (128311), 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) [2022-11-20 09:30:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103858 states to 103858 states and 128311 transitions. [2022-11-20 09:30:11,230 INFO L78 Accepts]: Start accepts. Automaton has 103858 states and 128311 transitions. Word has length 192 [2022-11-20 09:30:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:11,230 INFO L495 AbstractCegarLoop]: Abstraction has 103858 states and 128311 transitions. [2022-11-20 09:30:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 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) [2022-11-20 09:30:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 103858 states and 128311 transitions. [2022-11-20 09:30:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-20 09:30:11,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:11,260 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 09:30:11,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1860977861, now seen corresponding path program 1 times [2022-11-20 09:30:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:11,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427246983] [2022-11-20 09:30:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:11,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:30:11,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:11,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427246983] [2022-11-20 09:30:11,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427246983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:11,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681541459] [2022-11-20 09:30:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:11,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:12,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:30:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:30:12,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:30:12,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:12,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681541459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:12,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:30:12,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 09:30:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145480992] [2022-11-20 09:30:12,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:12,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:12,615 INFO L87 Difference]: Start difference. First operand 103858 states and 128311 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2022-11-20 09:30:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:14,643 INFO L93 Difference]: Finished difference Result 203456 states and 254569 transitions. [2022-11-20 09:30:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 195 [2022-11-20 09:30:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:14,789 INFO L225 Difference]: With dead ends: 203456 [2022-11-20 09:30:14,789 INFO L226 Difference]: Without dead ends: 100412 [2022-11-20 09:30:14,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:14,829 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 90 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:14,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 406 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:30:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100412 states. [2022-11-20 09:30:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100412 to 100192. [2022-11-20 09:30:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100192 states, 100191 states have (on average 1.1668213711810442) internal successors, (116905), 100191 states have internal predecessors, (116905), 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) [2022-11-20 09:30:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100192 states to 100192 states and 116905 transitions. [2022-11-20 09:30:16,430 INFO L78 Accepts]: Start accepts. Automaton has 100192 states and 116905 transitions. Word has length 195 [2022-11-20 09:30:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:16,430 INFO L495 AbstractCegarLoop]: Abstraction has 100192 states and 116905 transitions. [2022-11-20 09:30:16,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2022-11-20 09:30:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 100192 states and 116905 transitions. [2022-11-20 09:30:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-20 09:30:16,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:16,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:16,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:16,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:16,662 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1670326217, now seen corresponding path program 1 times [2022-11-20 09:30:16,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499143354] [2022-11-20 09:30:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 09:30:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499143354] [2022-11-20 09:30:17,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499143354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99537225] [2022-11-20 09:30:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:17,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:17,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:17,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:17,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:30:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:30:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 09:30:17,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:17,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99537225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:17,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:30:17,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 09:30:17,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347882730] [2022-11-20 09:30:17,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:17,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:17,355 INFO L87 Difference]: Start difference. First operand 100192 states and 116905 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2022-11-20 09:30:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:18,743 INFO L93 Difference]: Finished difference Result 231144 states and 270978 transitions. [2022-11-20 09:30:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 218 [2022-11-20 09:30:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:18,948 INFO L225 Difference]: With dead ends: 231144 [2022-11-20 09:30:18,948 INFO L226 Difference]: Without dead ends: 157656 [2022-11-20 09:30:19,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:19,007 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 312 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:19,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 892 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:30:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157656 states. [2022-11-20 09:30:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157656 to 154201. [2022-11-20 09:30:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154201 states, 154200 states have (on average 1.1610505836575875) internal successors, (179034), 154200 states have internal predecessors, (179034), 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) [2022-11-20 09:30:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154201 states to 154201 states and 179034 transitions. [2022-11-20 09:30:21,734 INFO L78 Accepts]: Start accepts. Automaton has 154201 states and 179034 transitions. Word has length 218 [2022-11-20 09:30:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:21,735 INFO L495 AbstractCegarLoop]: Abstraction has 154201 states and 179034 transitions. [2022-11-20 09:30:21,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2022-11-20 09:30:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 154201 states and 179034 transitions. [2022-11-20 09:30:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-20 09:30:21,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:21,852 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:21,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:22,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:22,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678727, now seen corresponding path program 1 times [2022-11-20 09:30:22,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415409186] [2022-11-20 09:30:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 09:30:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415409186] [2022-11-20 09:30:22,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415409186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967933612] [2022-11-20 09:30:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:22,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:22,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:30:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:30:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 09:30:22,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:22,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967933612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:22,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:30:22,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 09:30:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357823251] [2022-11-20 09:30:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:22,954 INFO L87 Difference]: Start difference. First operand 154201 states and 179034 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2022-11-20 09:30:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:25,154 INFO L93 Difference]: Finished difference Result 333595 states and 388883 transitions. [2022-11-20 09:30:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 218 [2022-11-20 09:30:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:25,381 INFO L225 Difference]: With dead ends: 333595 [2022-11-20 09:30:25,381 INFO L226 Difference]: Without dead ends: 179802 [2022-11-20 09:30:25,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:25,453 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 90 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:25,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 363 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 09:30:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179802 states. [2022-11-20 09:30:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179802 to 179598. [2022-11-20 09:30:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179598 states, 179597 states have (on average 1.1587777078681716) internal successors, (208113), 179597 states have internal predecessors, (208113), 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) [2022-11-20 09:30:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179598 states to 179598 states and 208113 transitions. [2022-11-20 09:30:28,819 INFO L78 Accepts]: Start accepts. Automaton has 179598 states and 208113 transitions. Word has length 218 [2022-11-20 09:30:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:28,820 INFO L495 AbstractCegarLoop]: Abstraction has 179598 states and 208113 transitions. [2022-11-20 09:30:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2022-11-20 09:30:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 179598 states and 208113 transitions. [2022-11-20 09:30:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-20 09:30:28,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:28,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:28,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:29,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 09:30:29,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:29,071 INFO L85 PathProgramCache]: Analyzing trace with hash -194732802, now seen corresponding path program 1 times [2022-11-20 09:30:29,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:29,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830735222] [2022-11-20 09:30:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:29,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830735222] [2022-11-20 09:30:29,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830735222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:29,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:29,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772416824] [2022-11-20 09:30:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:29,414 INFO L87 Difference]: Start difference. First operand 179598 states and 208113 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2022-11-20 09:30:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:31,823 INFO L93 Difference]: Finished difference Result 358891 states and 417485 transitions. [2022-11-20 09:30:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:31,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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 222 [2022-11-20 09:30:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:32,101 INFO L225 Difference]: With dead ends: 358891 [2022-11-20 09:30:32,101 INFO L226 Difference]: Without dead ends: 209454 [2022-11-20 09:30:32,169 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:30:32,170 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:32,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 226 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:30:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209454 states. [2022-11-20 09:30:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209454 to 201589. [2022-11-20 09:30:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201589 states, 201588 states have (on average 1.1675546163462112) internal successors, (235365), 201588 states have internal predecessors, (235365), 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) [2022-11-20 09:30:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201589 states to 201589 states and 235365 transitions. [2022-11-20 09:30:35,996 INFO L78 Accepts]: Start accepts. Automaton has 201589 states and 235365 transitions. Word has length 222 [2022-11-20 09:30:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:35,996 INFO L495 AbstractCegarLoop]: Abstraction has 201589 states and 235365 transitions. [2022-11-20 09:30:35,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2022-11-20 09:30:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 201589 states and 235365 transitions. [2022-11-20 09:30:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-20 09:30:36,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:36,029 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 09:30:36,030 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:36,030 INFO L85 PathProgramCache]: Analyzing trace with hash -227102397, now seen corresponding path program 1 times [2022-11-20 09:30:36,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:36,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471636716] [2022-11-20 09:30:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:36,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-20 09:30:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471636716] [2022-11-20 09:30:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471636716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067134739] [2022-11-20 09:30:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:36,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:36,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:36,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:36,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85d566e-9426-4d92-bc2c-921156893bd1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:30:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:36,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:30:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 09:30:36,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:36,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067134739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:36,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:30:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 09:30:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832105834] [2022-11-20 09:30:36,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:36,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:36,894 INFO L87 Difference]: Start difference. First operand 201589 states and 235365 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-20 09:30:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:39,851 INFO L93 Difference]: Finished difference Result 529859 states and 619149 transitions. [2022-11-20 09:30:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 238 [2022-11-20 09:30:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted.