./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 850d02aa9cb18294f9975f6e4e447a197934bcfd77c20fda5c55e9f9e3e0a979 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:31:09,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:31:09,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:31:09,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:31:09,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:31:09,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:31:09,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:31:09,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:31:09,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:31:09,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:31:09,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:31:09,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:31:09,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:31:09,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:31:09,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:31:09,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:31:09,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:31:09,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:31:09,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:31:09,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:31:09,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:31:09,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:31:09,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:31:09,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:31:09,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:31:09,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:31:09,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:31:09,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:31:09,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:31:09,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:31:09,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:31:09,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:31:09,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:31:09,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:31:09,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:31:09,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:31:09,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:31:09,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:31:09,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:31:09,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:31:09,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:31:09,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:31:09,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:31:09,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:31:09,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:31:09,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:31:09,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:31:09,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:31:09,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:31:09,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:31:09,478 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:31:09,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:31:09,479 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:31:09,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:31:09,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:31:09,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:31:09,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:31:09,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:31:09,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:31:09,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:31:09,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:31:09,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:31:09,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:31:09,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:31:09,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:31:09,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:31:09,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:31:09,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:31:09,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:31:09,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:31:09,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:31:09,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:31:09,492 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:31:09,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:31:09,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:31:09,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:31:09,493 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_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 850d02aa9cb18294f9975f6e4e447a197934bcfd77c20fda5c55e9f9e3e0a979 [2021-11-13 17:31:09,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:31:09,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:31:09,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:31:09,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:31:09,834 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:31:09,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2021-11-13 17:31:09,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/data/766773071/85ff6155562f49bca910f0a8f4b3f774/FLAGc33b0b2f2 [2021-11-13 17:31:10,437 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:31:10,439 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2021-11-13 17:31:10,459 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/data/766773071/85ff6155562f49bca910f0a8f4b3f774/FLAGc33b0b2f2 [2021-11-13 17:31:10,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/data/766773071/85ff6155562f49bca910f0a8f4b3f774 [2021-11-13 17:31:10,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:31:10,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:31:10,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:31:10,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:31:10,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:31:10,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:31:10" (1/1) ... [2021-11-13 17:31:10,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5671f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:10, skipping insertion in model container [2021-11-13 17:31:10,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:31:10" (1/1) ... [2021-11-13 17:31:10,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:31:10,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:31:11,073 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c[6787,6800] [2021-11-13 17:31:11,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:31:11,087 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:31:11,127 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c[6787,6800] [2021-11-13 17:31:11,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:31:11,143 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:31:11,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11 WrapperNode [2021-11-13 17:31:11,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:31:11,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:31:11,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:31:11,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:31:11,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:31:11,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:31:11,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:31:11,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:31:11,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:31:11,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:31:11,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:31:11,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:31:11,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:31:11,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:11,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:31:11,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:31:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:31:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:31:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:31:11,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:31:11,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:31:11,878 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:31:11,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:31:11 BoogieIcfgContainer [2021-11-13 17:31:11,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:31:11,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:31:11,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:31:11,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:31:11,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:31:10" (1/3) ... [2021-11-13 17:31:11,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a25b99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:31:11, skipping insertion in model container [2021-11-13 17:31:11,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (2/3) ... [2021-11-13 17:31:11,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a25b99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:31:11, skipping insertion in model container [2021-11-13 17:31:11,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:31:11" (3/3) ... [2021-11-13 17:31:11,890 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c [2021-11-13 17:31:11,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:31:11,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:31:11,943 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:31:11,950 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:31:11,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:31:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 77 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 17:31:11,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:11,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:11,978 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash -430581620, now seen corresponding path program 1 times [2021-11-13 17:31:11,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:11,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109855798] [2021-11-13 17:31:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:11,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:12,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109855798] [2021-11-13 17:31:12,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109855798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:12,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:12,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:12,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788400819] [2021-11-13 17:31:12,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:12,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:12,307 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 77 states have internal predecessors, (127), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:12,415 INFO L93 Difference]: Finished difference Result 133 states and 215 transitions. [2021-11-13 17:31:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:31:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-11-13 17:31:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:12,428 INFO L225 Difference]: With dead ends: 133 [2021-11-13 17:31:12,428 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 17:31:12,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:12,436 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.64ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:12,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 452 Invalid, 27 Unknown, 0 Unchecked, 7.64ms Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 43.27ms Time] [2021-11-13 17:31:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 17:31:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-13 17:31:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 103 transitions. [2021-11-13 17:31:12,476 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 103 transitions. Word has length 25 [2021-11-13 17:31:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:12,476 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 103 transitions. [2021-11-13 17:31:12,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 103 transitions. [2021-11-13 17:31:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:31:12,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:12,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:12,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:31:12,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -482254910, now seen corresponding path program 1 times [2021-11-13 17:31:12,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:12,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636047542] [2021-11-13 17:31:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:12,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:12,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636047542] [2021-11-13 17:31:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636047542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:12,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:12,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:12,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905648238] [2021-11-13 17:31:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:12,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:12,582 INFO L87 Difference]: Start difference. First operand 74 states and 103 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:12,611 INFO L93 Difference]: Finished difference Result 164 states and 243 transitions. [2021-11-13 17:31:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-13 17:31:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:12,614 INFO L225 Difference]: With dead ends: 164 [2021-11-13 17:31:12,614 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 17:31:12,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:12,617 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.17ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:12,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 7 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 12.17ms Time] [2021-11-13 17:31:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 17:31:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-11-13 17:31:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4636363636363636) internal successors, (161), 110 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) [2021-11-13 17:31:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2021-11-13 17:31:12,634 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 41 [2021-11-13 17:31:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:12,635 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2021-11-13 17:31:12,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2021-11-13 17:31:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 17:31:12,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:12,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:12,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:31:12,638 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:12,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2033327635, now seen corresponding path program 1 times [2021-11-13 17:31:12,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:12,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446547179] [2021-11-13 17:31:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:12,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:12,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446547179] [2021-11-13 17:31:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446547179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:12,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:12,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:12,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366137630] [2021-11-13 17:31:12,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:12,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:12,756 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:12,810 INFO L93 Difference]: Finished difference Result 263 states and 397 transitions. [2021-11-13 17:31:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2021-11-13 17:31:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:12,815 INFO L225 Difference]: With dead ends: 263 [2021-11-13 17:31:12,818 INFO L226 Difference]: Without dead ends: 175 [2021-11-13 17:31:12,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:12,821 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 59 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:12,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 204 Invalid, 7 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 29.21ms Time] [2021-11-13 17:31:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-13 17:31:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2021-11-13 17:31:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4883720930232558) internal successors, (256), 172 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 256 transitions. [2021-11-13 17:31:12,861 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 256 transitions. Word has length 42 [2021-11-13 17:31:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 256 transitions. [2021-11-13 17:31:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 256 transitions. [2021-11-13 17:31:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:31:12,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:12,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:12,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:31:12,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1819327886, now seen corresponding path program 1 times [2021-11-13 17:31:12,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:12,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158345853] [2021-11-13 17:31:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:12,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:12,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158345853] [2021-11-13 17:31:12,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158345853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:12,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:12,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:12,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839197968] [2021-11-13 17:31:12,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:13,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:13,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:13,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:13,001 INFO L87 Difference]: Start difference. First operand 173 states and 256 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:13,142 INFO L93 Difference]: Finished difference Result 773 states and 1188 transitions. [2021-11-13 17:31:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:31:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 43 [2021-11-13 17:31:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:13,151 INFO L225 Difference]: With dead ends: 773 [2021-11-13 17:31:13,151 INFO L226 Difference]: Without dead ends: 623 [2021-11-13 17:31:13,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:13,169 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 403 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.32ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:13,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 532 Invalid, 46 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 51.32ms Time] [2021-11-13 17:31:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-13 17:31:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 321. [2021-11-13 17:31:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.5) internal successors, (480), 320 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 480 transitions. [2021-11-13 17:31:13,230 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 480 transitions. Word has length 43 [2021-11-13 17:31:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:13,230 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 480 transitions. [2021-11-13 17:31:13,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 480 transitions. [2021-11-13 17:31:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 17:31:13,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:13,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:13,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:31:13,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -947913043, now seen corresponding path program 1 times [2021-11-13 17:31:13,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:13,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966627387] [2021-11-13 17:31:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:13,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:13,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:13,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966627387] [2021-11-13 17:31:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966627387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:13,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:13,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:13,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052213545] [2021-11-13 17:31:13,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:13,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:13,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:13,418 INFO L87 Difference]: Start difference. First operand 321 states and 480 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:13,568 INFO L93 Difference]: Finished difference Result 1143 states and 1727 transitions. [2021-11-13 17:31:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:31:13,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 44 [2021-11-13 17:31:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:13,576 INFO L225 Difference]: With dead ends: 1143 [2021-11-13 17:31:13,576 INFO L226 Difference]: Without dead ends: 845 [2021-11-13 17:31:13,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:13,585 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 239 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.68ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:13,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 346 Invalid, 44 Unknown, 0 Unchecked, 5.68ms Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 62.55ms Time] [2021-11-13 17:31:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-11-13 17:31:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 841. [2021-11-13 17:31:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5) internal successors, (1260), 840 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1260 transitions. [2021-11-13 17:31:13,654 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1260 transitions. Word has length 44 [2021-11-13 17:31:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:13,657 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1260 transitions. [2021-11-13 17:31:13,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1260 transitions. [2021-11-13 17:31:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 17:31:13,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:13,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:13,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:31:13,673 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1382364025, now seen corresponding path program 1 times [2021-11-13 17:31:13,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:13,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540760241] [2021-11-13 17:31:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:13,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:13,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:13,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540760241] [2021-11-13 17:31:13,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540760241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:13,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:13,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:31:13,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456580906] [2021-11-13 17:31:13,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:13,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:31:13,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:31:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:31:13,855 INFO L87 Difference]: Start difference. First operand 841 states and 1260 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:14,067 INFO L93 Difference]: Finished difference Result 1755 states and 2593 transitions. [2021-11-13 17:31:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:31:14,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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 45 [2021-11-13 17:31:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:14,079 INFO L225 Difference]: With dead ends: 1755 [2021-11-13 17:31:14,080 INFO L226 Difference]: Without dead ends: 1753 [2021-11-13 17:31:14,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:31:14,084 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 540 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.49ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:14,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 501 Invalid, 40 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 35.49ms Time] [2021-11-13 17:31:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-11-13 17:31:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 913. [2021-11-13 17:31:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.4605263157894737) internal successors, (1332), 912 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1332 transitions. [2021-11-13 17:31:14,164 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1332 transitions. Word has length 45 [2021-11-13 17:31:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1332 transitions. [2021-11-13 17:31:14,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1332 transitions. [2021-11-13 17:31:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:31:14,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:14,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:14,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:31:14,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash 148966672, now seen corresponding path program 1 times [2021-11-13 17:31:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:14,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108265909] [2021-11-13 17:31:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:14,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:14,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:14,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108265909] [2021-11-13 17:31:14,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108265909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:14,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:14,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:14,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196275738] [2021-11-13 17:31:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:14,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:14,271 INFO L87 Difference]: Start difference. First operand 913 states and 1332 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:14,383 INFO L93 Difference]: Finished difference Result 2393 states and 3478 transitions. [2021-11-13 17:31:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:14,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2021-11-13 17:31:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:14,393 INFO L225 Difference]: With dead ends: 2393 [2021-11-13 17:31:14,393 INFO L226 Difference]: Without dead ends: 1503 [2021-11-13 17:31:14,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:14,396 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 49 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.30ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:14,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 178 Invalid, 11 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 13.30ms Time] [2021-11-13 17:31:14,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-11-13 17:31:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1481. [2021-11-13 17:31:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.4243243243243244) internal successors, (2108), 1480 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2108 transitions. [2021-11-13 17:31:14,521 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2108 transitions. Word has length 46 [2021-11-13 17:31:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:14,521 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 2108 transitions. [2021-11-13 17:31:14,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2108 transitions. [2021-11-13 17:31:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 17:31:14,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:14,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:14,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:31:14,524 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1623386325, now seen corresponding path program 1 times [2021-11-13 17:31:14,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:14,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589652497] [2021-11-13 17:31:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:14,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:14,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:14,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589652497] [2021-11-13 17:31:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589652497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:14,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:14,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:14,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027777546] [2021-11-13 17:31:14,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:14,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:14,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:14,595 INFO L87 Difference]: Start difference. First operand 1481 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:14,735 INFO L93 Difference]: Finished difference Result 3000 states and 4298 transitions. [2021-11-13 17:31:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-13 17:31:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:14,749 INFO L225 Difference]: With dead ends: 3000 [2021-11-13 17:31:14,750 INFO L226 Difference]: Without dead ends: 2109 [2021-11-13 17:31:14,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:14,753 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 65 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:14,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 9.99ms Time] [2021-11-13 17:31:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-11-13 17:31:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2107. [2021-11-13 17:31:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 1.4064577397910731) internal successors, (2962), 2106 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2962 transitions. [2021-11-13 17:31:14,928 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2962 transitions. Word has length 47 [2021-11-13 17:31:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:14,929 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 2962 transitions. [2021-11-13 17:31:14,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2962 transitions. [2021-11-13 17:31:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:31:14,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:14,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:14,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:31:14,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash 876819086, now seen corresponding path program 1 times [2021-11-13 17:31:14,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:14,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227996690] [2021-11-13 17:31:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:14,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 17:31:15,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:15,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227996690] [2021-11-13 17:31:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227996690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:15,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:15,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:15,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129044781] [2021-11-13 17:31:15,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:15,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:15,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:15,038 INFO L87 Difference]: Start difference. First operand 2107 states and 2962 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:15,259 INFO L93 Difference]: Finished difference Result 3749 states and 5326 transitions. [2021-11-13 17:31:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:31:15,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:31:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:15,277 INFO L225 Difference]: With dead ends: 3749 [2021-11-13 17:31:15,277 INFO L226 Difference]: Without dead ends: 2991 [2021-11-13 17:31:15,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:15,282 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 279 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.00ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:15,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 462 Invalid, 31 Unknown, 0 Unchecked, 3.00ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 27.57ms Time] [2021-11-13 17:31:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-11-13 17:31:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2721. [2021-11-13 17:31:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 1.4073529411764707) internal successors, (3828), 2720 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3828 transitions. [2021-11-13 17:31:15,497 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3828 transitions. Word has length 66 [2021-11-13 17:31:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:15,498 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3828 transitions. [2021-11-13 17:31:15,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3828 transitions. [2021-11-13 17:31:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:31:15,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:15,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:15,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:31:15,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1304165150, now seen corresponding path program 1 times [2021-11-13 17:31:15,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:15,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360835] [2021-11-13 17:31:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:15,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:15,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:15,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360835] [2021-11-13 17:31:15,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:15,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:15,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:15,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554650810] [2021-11-13 17:31:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:15,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:15,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:15,555 INFO L87 Difference]: Start difference. First operand 2721 states and 3828 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:15,785 INFO L93 Difference]: Finished difference Result 4469 states and 6263 transitions. [2021-11-13 17:31:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:15,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:31:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:15,803 INFO L225 Difference]: With dead ends: 4469 [2021-11-13 17:31:15,803 INFO L226 Difference]: Without dead ends: 2909 [2021-11-13 17:31:15,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:15,807 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:15,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 219 Invalid, 8 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 10.99ms Time] [2021-11-13 17:31:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-11-13 17:31:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2772. [2021-11-13 17:31:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2771 states have (on average 1.3789245759653554) internal successors, (3821), 2771 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3821 transitions. [2021-11-13 17:31:16,028 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3821 transitions. Word has length 66 [2021-11-13 17:31:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:16,029 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 3821 transitions. [2021-11-13 17:31:16,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3821 transitions. [2021-11-13 17:31:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:31:16,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:16,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:16,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:31:16,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1558535868, now seen corresponding path program 1 times [2021-11-13 17:31:16,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:16,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556609954] [2021-11-13 17:31:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:16,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:31:16,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:16,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556609954] [2021-11-13 17:31:16,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556609954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:16,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:16,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554427484] [2021-11-13 17:31:16,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:16,118 INFO L87 Difference]: Start difference. First operand 2772 states and 3821 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:16,357 INFO L93 Difference]: Finished difference Result 3833 states and 5332 transitions. [2021-11-13 17:31:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:31:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:31:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:16,377 INFO L225 Difference]: With dead ends: 3833 [2021-11-13 17:31:16,377 INFO L226 Difference]: Without dead ends: 3441 [2021-11-13 17:31:16,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:16,380 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 285 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.24ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:16,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 439 Invalid, 34 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 36.24ms Time] [2021-11-13 17:31:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-11-13 17:31:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3150. [2021-11-13 17:31:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 1.3817084788821847) internal successors, (4351), 3149 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4351 transitions. [2021-11-13 17:31:16,618 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4351 transitions. Word has length 66 [2021-11-13 17:31:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:16,619 INFO L470 AbstractCegarLoop]: Abstraction has 3150 states and 4351 transitions. [2021-11-13 17:31:16,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4351 transitions. [2021-11-13 17:31:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 17:31:16,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:16,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:16,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:31:16,622 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:16,623 INFO L85 PathProgramCache]: Analyzing trace with hash -333777212, now seen corresponding path program 1 times [2021-11-13 17:31:16,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:16,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803918443] [2021-11-13 17:31:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:16,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:16,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:16,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803918443] [2021-11-13 17:31:16,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803918443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:16,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93986576] [2021-11-13 17:31:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:16,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:16,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:16,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:16,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:31:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:31:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:31:17,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:31:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93986576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:17,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:17,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-11-13 17:31:17,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062874328] [2021-11-13 17:31:17,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:17,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 17:31:17,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 17:31:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:31:17,693 INFO L87 Difference]: Start difference. First operand 3150 states and 4351 transitions. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:23,008 INFO L93 Difference]: Finished difference Result 31671 states and 43517 transitions. [2021-11-13 17:31:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-13 17:31:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 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 67 [2021-11-13 17:31:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:23,135 INFO L225 Difference]: With dead ends: 31671 [2021-11-13 17:31:23,135 INFO L226 Difference]: Without dead ends: 28554 [2021-11-13 17:31:23,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1251, Invalid=5069, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 17:31:23,151 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 2704 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1264.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.09ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1527.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:23,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 1837 Invalid, 1696 Unknown, 0 Unchecked, 37.09ms Time], IncrementalHoareTripleChecker [130 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1527.05ms Time] [2021-11-13 17:31:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28554 states. [2021-11-13 17:31:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28554 to 16941. [2021-11-13 17:31:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16941 states, 16940 states have (on average 1.3589728453364818) internal successors, (23021), 16940 states have internal predecessors, (23021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16941 states to 16941 states and 23021 transitions. [2021-11-13 17:31:24,644 INFO L78 Accepts]: Start accepts. Automaton has 16941 states and 23021 transitions. Word has length 67 [2021-11-13 17:31:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:24,645 INFO L470 AbstractCegarLoop]: Abstraction has 16941 states and 23021 transitions. [2021-11-13 17:31:24,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 16941 states and 23021 transitions. [2021-11-13 17:31:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 17:31:24,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:24,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:24,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:24,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 17:31:24,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1942679399, now seen corresponding path program 1 times [2021-11-13 17:31:24,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:24,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401388132] [2021-11-13 17:31:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:24,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:24,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:24,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401388132] [2021-11-13 17:31:24,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401388132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:24,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28035263] [2021-11-13 17:31:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:24,914 INFO L87 Difference]: Start difference. First operand 16941 states and 23021 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:26,121 INFO L93 Difference]: Finished difference Result 43849 states and 59351 transitions. [2021-11-13 17:31:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-13 17:31:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:26,201 INFO L225 Difference]: With dead ends: 43849 [2021-11-13 17:31:26,201 INFO L226 Difference]: Without dead ends: 29850 [2021-11-13 17:31:26,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:26,225 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.89ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:26,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 203 Invalid, 9 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 8.89ms Time] [2021-11-13 17:31:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29850 states. [2021-11-13 17:31:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29850 to 29810. [2021-11-13 17:31:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29810 states, 29809 states have (on average 1.3364084672414371) internal successors, (39837), 29809 states have internal predecessors, (39837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29810 states to 29810 states and 39837 transitions. [2021-11-13 17:31:27,974 INFO L78 Accepts]: Start accepts. Automaton has 29810 states and 39837 transitions. Word has length 68 [2021-11-13 17:31:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:27,975 INFO L470 AbstractCegarLoop]: Abstraction has 29810 states and 39837 transitions. [2021-11-13 17:31:27,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29810 states and 39837 transitions. [2021-11-13 17:31:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 17:31:27,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:27,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:31:27,981 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 13414152, now seen corresponding path program 1 times [2021-11-13 17:31:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:27,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415781330] [2021-11-13 17:31:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:27,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:31:28,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:28,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415781330] [2021-11-13 17:31:28,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415781330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:28,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:28,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:28,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782950286] [2021-11-13 17:31:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:28,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:28,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:28,035 INFO L87 Difference]: Start difference. First operand 29810 states and 39837 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:29,630 INFO L93 Difference]: Finished difference Result 46563 states and 62680 transitions. [2021-11-13 17:31:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:31:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-13 17:31:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:29,715 INFO L225 Difference]: With dead ends: 46563 [2021-11-13 17:31:29,715 INFO L226 Difference]: Without dead ends: 39211 [2021-11-13 17:31:29,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:29,732 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 271 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.33ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:29,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 489 Invalid, 34 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 29.33ms Time] [2021-11-13 17:31:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39211 states. [2021-11-13 17:31:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39211 to 35828. [2021-11-13 17:31:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35828 states, 35827 states have (on average 1.3327378792530773) internal successors, (47748), 35827 states have internal predecessors, (47748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35828 states to 35828 states and 47748 transitions. [2021-11-13 17:31:31,540 INFO L78 Accepts]: Start accepts. Automaton has 35828 states and 47748 transitions. Word has length 69 [2021-11-13 17:31:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:31,540 INFO L470 AbstractCegarLoop]: Abstraction has 35828 states and 47748 transitions. [2021-11-13 17:31:31,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 35828 states and 47748 transitions. [2021-11-13 17:31:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 17:31:31,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:31,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:31,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:31:31,554 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1336169493, now seen corresponding path program 1 times [2021-11-13 17:31:31,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:31,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78223018] [2021-11-13 17:31:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:31,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:31,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:31,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78223018] [2021-11-13 17:31:31,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78223018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:31,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:31,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:31,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309448395] [2021-11-13 17:31:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:31,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:31,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:31,596 INFO L87 Difference]: Start difference. First operand 35828 states and 47748 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:33,902 INFO L93 Difference]: Finished difference Result 84541 states and 112161 transitions. [2021-11-13 17:31:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-13 17:31:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:33,978 INFO L225 Difference]: With dead ends: 84541 [2021-11-13 17:31:33,978 INFO L226 Difference]: Without dead ends: 50714 [2021-11-13 17:31:34,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:34,018 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:34,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 238 Invalid, 9 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 10.08ms Time] [2021-11-13 17:31:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50714 states. [2021-11-13 17:31:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50714 to 41050. [2021-11-13 17:31:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41050 states, 41049 states have (on average 1.3163779872834904) internal successors, (54036), 41049 states have internal predecessors, (54036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41050 states to 41050 states and 54036 transitions. [2021-11-13 17:31:36,336 INFO L78 Accepts]: Start accepts. Automaton has 41050 states and 54036 transitions. Word has length 69 [2021-11-13 17:31:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:36,337 INFO L470 AbstractCegarLoop]: Abstraction has 41050 states and 54036 transitions. [2021-11-13 17:31:36,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 41050 states and 54036 transitions. [2021-11-13 17:31:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 17:31:36,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:36,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:36,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:31:36,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash 896200571, now seen corresponding path program 1 times [2021-11-13 17:31:36,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:36,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236471576] [2021-11-13 17:31:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:36,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:36,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:36,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236471576] [2021-11-13 17:31:36,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236471576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:36,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280977661] [2021-11-13 17:31:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:36,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:36,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:36,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:31:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:31:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:36,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:37,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280977661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:37,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:37,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-13 17:31:37,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534839316] [2021-11-13 17:31:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:37,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:31:37,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:31:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:37,093 INFO L87 Difference]: Start difference. First operand 41050 states and 54036 transitions. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:40,840 INFO L93 Difference]: Finished difference Result 95842 states and 126171 transitions. [2021-11-13 17:31:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:31:40,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 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 70 [2021-11-13 17:31:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:40,941 INFO L225 Difference]: With dead ends: 95842 [2021-11-13 17:31:40,941 INFO L226 Difference]: Without dead ends: 70591 [2021-11-13 17:31:40,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:31:40,969 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1552 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.47ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:40,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 427 Invalid, 290 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [57 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 178.47ms Time] [2021-11-13 17:31:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70591 states. [2021-11-13 17:31:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70591 to 41740. [2021-11-13 17:31:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41740 states, 41739 states have (on average 1.3282781092024245) internal successors, (55441), 41739 states have internal predecessors, (55441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41740 states to 41740 states and 55441 transitions. [2021-11-13 17:31:43,588 INFO L78 Accepts]: Start accepts. Automaton has 41740 states and 55441 transitions. Word has length 70 [2021-11-13 17:31:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:43,589 INFO L470 AbstractCegarLoop]: Abstraction has 41740 states and 55441 transitions. [2021-11-13 17:31:43,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41740 states and 55441 transitions. [2021-11-13 17:31:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 17:31:43,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:43,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:43,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:43,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:31:43,811 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1077094294, now seen corresponding path program 1 times [2021-11-13 17:31:43,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:43,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788009391] [2021-11-13 17:31:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:43,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:43,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:43,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788009391] [2021-11-13 17:31:43,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788009391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:43,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:43,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:43,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008772527] [2021-11-13 17:31:43,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:43,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:43,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:43,853 INFO L87 Difference]: Start difference. First operand 41740 states and 55441 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:45,344 INFO L93 Difference]: Finished difference Result 46531 states and 61426 transitions. [2021-11-13 17:31:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-13 17:31:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:45,373 INFO L225 Difference]: With dead ends: 46531 [2021-11-13 17:31:45,373 INFO L226 Difference]: Without dead ends: 28649 [2021-11-13 17:31:45,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:45,383 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 53 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.10ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:45,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 252 Invalid, 8 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 10.10ms Time] [2021-11-13 17:31:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28649 states. [2021-11-13 17:31:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28649 to 28631. [2021-11-13 17:31:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28631 states, 28630 states have (on average 1.3024799161718477) internal successors, (37290), 28630 states have internal predecessors, (37290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28631 states to 28631 states and 37290 transitions. [2021-11-13 17:31:46,770 INFO L78 Accepts]: Start accepts. Automaton has 28631 states and 37290 transitions. Word has length 72 [2021-11-13 17:31:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:46,770 INFO L470 AbstractCegarLoop]: Abstraction has 28631 states and 37290 transitions. [2021-11-13 17:31:46,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 28631 states and 37290 transitions. [2021-11-13 17:31:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 17:31:46,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:46,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:31:46,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 133357367, now seen corresponding path program 1 times [2021-11-13 17:31:46,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:46,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726995031] [2021-11-13 17:31:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:46,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 17:31:46,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:46,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726995031] [2021-11-13 17:31:46,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726995031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:46,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:46,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:46,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307653089] [2021-11-13 17:31:46,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:46,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:31:46,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:31:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:31:46,832 INFO L87 Difference]: Start difference. First operand 28631 states and 37290 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:49,110 INFO L93 Difference]: Finished difference Result 61516 states and 79862 transitions. [2021-11-13 17:31:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:31:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-13 17:31:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:49,147 INFO L225 Difference]: With dead ends: 61516 [2021-11-13 17:31:49,148 INFO L226 Difference]: Without dead ends: 32935 [2021-11-13 17:31:49,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:31:49,161 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 440 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.53ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:49,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 205 Invalid, 102 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 102.53ms Time] [2021-11-13 17:31:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32935 states. [2021-11-13 17:31:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32935 to 31550. [2021-11-13 17:31:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31550 states, 31549 states have (on average 1.279501727471552) internal successors, (40367), 31549 states have internal predecessors, (40367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31550 states to 31550 states and 40367 transitions. [2021-11-13 17:31:50,873 INFO L78 Accepts]: Start accepts. Automaton has 31550 states and 40367 transitions. Word has length 73 [2021-11-13 17:31:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:50,873 INFO L470 AbstractCegarLoop]: Abstraction has 31550 states and 40367 transitions. [2021-11-13 17:31:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 31550 states and 40367 transitions. [2021-11-13 17:31:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 17:31:50,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:50,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:50,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:31:50,880 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash -488860833, now seen corresponding path program 1 times [2021-11-13 17:31:50,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:50,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663865603] [2021-11-13 17:31:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:50,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:50,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:50,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663865603] [2021-11-13 17:31:50,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663865603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:50,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385690077] [2021-11-13 17:31:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:50,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:50,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:50,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:50,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:31:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:31:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:51,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:51,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385690077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:51,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:51,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-13 17:31:51,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882922500] [2021-11-13 17:31:51,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:51,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:31:51,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:31:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:51,640 INFO L87 Difference]: Start difference. First operand 31550 states and 40367 transitions. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:55,172 INFO L93 Difference]: Finished difference Result 78244 states and 99925 transitions. [2021-11-13 17:31:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:31:55,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 10 states have internal predecessors, (127), 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 73 [2021-11-13 17:31:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:55,240 INFO L225 Difference]: With dead ends: 78244 [2021-11-13 17:31:55,241 INFO L226 Difference]: Without dead ends: 56906 [2021-11-13 17:31:55,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:31:55,254 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 988 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:55,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 283 Invalid, 198 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [49 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 138.14ms Time] [2021-11-13 17:31:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56906 states. [2021-11-13 17:31:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56906 to 35445. [2021-11-13 17:31:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35445 states, 35444 states have (on average 1.2789752849565512) internal successors, (45332), 35444 states have internal predecessors, (45332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35445 states to 35445 states and 45332 transitions. [2021-11-13 17:31:57,512 INFO L78 Accepts]: Start accepts. Automaton has 35445 states and 45332 transitions. Word has length 73 [2021-11-13 17:31:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:57,513 INFO L470 AbstractCegarLoop]: Abstraction has 35445 states and 45332 transitions. [2021-11-13 17:31:57,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 35445 states and 45332 transitions. [2021-11-13 17:31:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 17:31:57,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:57,520 INFO L514 BasicCegarLoop]: 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] [2021-11-13 17:31:57,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:57,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:57,747 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash -837010544, now seen corresponding path program 1 times [2021-11-13 17:31:57,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:57,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290526159] [2021-11-13 17:31:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:57,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:57,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:57,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290526159] [2021-11-13 17:31:57,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290526159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:57,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168299498] [2021-11-13 17:31:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:57,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:57,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:57,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:57,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:31:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:31:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:58,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168299498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:58,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-13 17:31:58,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411565317] [2021-11-13 17:31:58,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:58,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:31:58,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:31:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:58,496 INFO L87 Difference]: Start difference. First operand 35445 states and 45332 transitions. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:32:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:01,828 INFO L93 Difference]: Finished difference Result 76249 states and 97075 transitions. [2021-11-13 17:32:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:32:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 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 74 [2021-11-13 17:32:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:01,884 INFO L225 Difference]: With dead ends: 76249 [2021-11-13 17:32:01,885 INFO L226 Difference]: Without dead ends: 51949 [2021-11-13 17:32:01,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:32:01,898 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1130 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:01,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 294 Invalid, 175 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [47 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 118.26ms Time] [2021-11-13 17:32:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51949 states. [2021-11-13 17:32:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51949 to 36578. [2021-11-13 17:32:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36578 states, 36577 states have (on average 1.2666703119446647) internal successors, (46331), 36577 states have internal predecessors, (46331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:32:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36578 states to 36578 states and 46331 transitions. [2021-11-13 17:32:04,401 INFO L78 Accepts]: Start accepts. Automaton has 36578 states and 46331 transitions. Word has length 74 [2021-11-13 17:32:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:04,402 INFO L470 AbstractCegarLoop]: Abstraction has 36578 states and 46331 transitions. [2021-11-13 17:32:04,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:32:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 36578 states and 46331 transitions. [2021-11-13 17:32:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 17:32:04,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:04,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:04,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-13 17:32:04,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:04,615 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:04,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1664762021, now seen corresponding path program 1 times [2021-11-13 17:32:04,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:04,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145845314] [2021-11-13 17:32:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:04,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:32:04,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:04,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145845314] [2021-11-13 17:32:04,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145845314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:04,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63605628] [2021-11-13 17:32:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:04,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:04,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:04,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:04,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3525e67a-1455-495e-b600-7a4148568c5a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:32:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 17:32:04,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:32:06,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:32:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:32:06,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63605628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:32:06,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:32:06,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-13 17:32:06,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132057552] [2021-11-13 17:32:06,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:32:06,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 17:32:06,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 17:32:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:32:06,719 INFO L87 Difference]: Start difference. First operand 36578 states and 46331 transitions. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 20 states have internal predecessors, (160), 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)