./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa --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 afac0863a681e4712e7bffaf04a415cd693c6153e1fe439605f11a4c250fdcc1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:41:33,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:41:33,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:41:33,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:41:33,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:41:33,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:41:33,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:41:33,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:41:33,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:41:33,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:41:33,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:41:33,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:41:33,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:41:33,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:41:33,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:41:33,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:41:33,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:41:33,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:41:33,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:41:33,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:41:33,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:41:33,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:41:33,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:41:33,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:41:33,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:41:33,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:41:33,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:41:33,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:41:33,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:41:33,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:41:33,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:41:33,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:41:33,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:41:33,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:41:33,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:41:33,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:41:33,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:41:33,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:41:33,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:41:33,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:41:33,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:41:33,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:41:33,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:41:33,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:41:33,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:41:33,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:41:33,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:41:33,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:41:33,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:41:33,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:41:33,517 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:41:33,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:41:33,518 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:41:33,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:41:33,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:41:33,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:41:33,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:41:33,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:41:33,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:41:33,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:41:33,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:41:33,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:41:33,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:41:33,521 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_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afac0863a681e4712e7bffaf04a415cd693c6153e1fe439605f11a4c250fdcc1 [2021-12-06 17:41:33,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:41:33,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:41:33,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:41:33,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:41:33,720 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:41:33,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-06 17:41:33,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/data/37f03397f/3084312930744ed7b675ca03820ca9ec/FLAGed7f561b2 [2021-12-06 17:41:34,158 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:41:34,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-06 17:41:34,167 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/data/37f03397f/3084312930744ed7b675ca03820ca9ec/FLAGed7f561b2 [2021-12-06 17:41:34,177 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/data/37f03397f/3084312930744ed7b675ca03820ca9ec [2021-12-06 17:41:34,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:41:34,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:41:34,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:41:34,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:41:34,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:41:34,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a08fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34, skipping insertion in model container [2021-12-06 17:41:34,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:41:34,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:41:34,346 WARN L230 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_cafb498a-3244-4ee2-82ba-071f4fb83c2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2021-12-06 17:41:34,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:41:34,367 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:41:34,391 WARN L230 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_cafb498a-3244-4ee2-82ba-071f4fb83c2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2021-12-06 17:41:34,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:41:34,413 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:41:34,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34 WrapperNode [2021-12-06 17:41:34,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:41:34,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:41:34,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:41:34,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:41:34,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,450 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 271 [2021-12-06 17:41:34,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:41:34,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:41:34,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:41:34,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:41:34,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:41:34,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:41:34,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:41:34,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:41:34,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (1/1) ... [2021-12-06 17:41:34,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:41:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:41:34,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:41:34,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:41:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:41:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:41:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:41:34,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:41:34,602 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:41:34,604 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:41:34,811 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:41:34,816 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:41:34,817 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 17:41:34,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:41:34 BoogieIcfgContainer [2021-12-06 17:41:34,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:41:34,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:41:34,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:41:34,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:41:34,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:41:34" (1/3) ... [2021-12-06 17:41:34,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c32b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:41:34, skipping insertion in model container [2021-12-06 17:41:34,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:41:34" (2/3) ... [2021-12-06 17:41:34,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c32b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:41:34, skipping insertion in model container [2021-12-06 17:41:34,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:41:34" (3/3) ... [2021-12-06 17:41:34,825 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-06 17:41:34,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:41:34,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:41:34,866 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:41:34,872 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 [2021-12-06 17:41:34,872 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:41:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 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) [2021-12-06 17:41:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:41:34,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:34,891 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] [2021-12-06 17:41:34,891 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2021-12-06 17:41:34,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:34,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121528800] [2021-12-06 17:41:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:34,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:35,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121528800] [2021-12-06 17:41:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121528800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:35,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:35,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:41:35,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040765028] [2021-12-06 17:41:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:35,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:41:35,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:41:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:41:35,119 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 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) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:35,160 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2021-12-06 17:41:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:41:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-06 17:41:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:35,170 INFO L225 Difference]: With dead ends: 140 [2021-12-06 17:41:35,170 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:41:35,173 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 [2021-12-06 17:41:35,176 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:35,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:41:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-12-06 17:41:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2021-12-06 17:41:35,210 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2021-12-06 17:41:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:35,210 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2021-12-06 17:41:35,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2021-12-06 17:41:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:41:35,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:35,212 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] [2021-12-06 17:41:35,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:41:35,213 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2021-12-06 17:41:35,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054517023] [2021-12-06 17:41:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:35,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:35,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:35,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054517023] [2021-12-06 17:41:35,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054517023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:35,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:35,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:41:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664253901] [2021-12-06 17:41:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:41:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:41:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:41:35,286 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:35,313 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2021-12-06 17:41:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:41:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-06 17:41:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:35,323 INFO L225 Difference]: With dead ends: 213 [2021-12-06 17:41:35,324 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 17:41:35,324 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 [2021-12-06 17:41:35,326 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:35,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 17:41:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-12-06 17:41:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 140 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2021-12-06 17:41:35,362 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2021-12-06 17:41:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:35,362 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2021-12-06 17:41:35,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2021-12-06 17:41:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:41:35,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:35,364 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] [2021-12-06 17:41:35,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:41:35,365 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2021-12-06 17:41:35,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:35,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164223882] [2021-12-06 17:41:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:35,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:35,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164223882] [2021-12-06 17:41:35,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164223882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:35,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:35,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:41:35,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940101495] [2021-12-06 17:41:35,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:35,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:41:35,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:41:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:41:35,444 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:35,476 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2021-12-06 17:41:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:41:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-06 17:41:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:35,479 INFO L225 Difference]: With dead ends: 353 [2021-12-06 17:41:35,479 INFO L226 Difference]: Without dead ends: 231 [2021-12-06 17:41:35,480 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 [2021-12-06 17:41:35,482 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 43 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:35,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-06 17:41:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-12-06 17:41:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5263157894736843) internal successors, (348), 228 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2021-12-06 17:41:35,511 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2021-12-06 17:41:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:35,512 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2021-12-06 17:41:35,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2021-12-06 17:41:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 17:41:35,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:35,514 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] [2021-12-06 17:41:35,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:41:35,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2021-12-06 17:41:35,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:35,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143918555] [2021-12-06 17:41:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:35,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143918555] [2021-12-06 17:41:35,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143918555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:35,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:35,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:41:35,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840441212] [2021-12-06 17:41:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:35,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:35,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:35,591 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:35,727 INFO L93 Difference]: Finished difference Result 1489 states and 2322 transitions. [2021-12-06 17:41:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:41:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-12-06 17:41:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:35,733 INFO L225 Difference]: With dead ends: 1489 [2021-12-06 17:41:35,734 INFO L226 Difference]: Without dead ends: 1279 [2021-12-06 17:41:35,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:41:35,737 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 423 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:35,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 419 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-12-06 17:41:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 437. [2021-12-06 17:41:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5137614678899083) internal successors, (660), 436 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 660 transitions. [2021-12-06 17:41:35,773 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 660 transitions. Word has length 39 [2021-12-06 17:41:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:35,773 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 660 transitions. [2021-12-06 17:41:35,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 660 transitions. [2021-12-06 17:41:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:41:35,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:35,774 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] [2021-12-06 17:41:35,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:41:35,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1891215654, now seen corresponding path program 1 times [2021-12-06 17:41:35,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532586613] [2021-12-06 17:41:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:35,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:35,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532586613] [2021-12-06 17:41:35,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532586613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:35,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:35,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:41:35,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947857894] [2021-12-06 17:41:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:35,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:41:35,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:41:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:41:35,813 INFO L87 Difference]: Start difference. First operand 437 states and 660 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) [2021-12-06 17:41:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:35,859 INFO L93 Difference]: Finished difference Result 1055 states and 1604 transitions. [2021-12-06 17:41:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:41:35,860 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 [2021-12-06 17:41:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:35,863 INFO L225 Difference]: With dead ends: 1055 [2021-12-06 17:41:35,863 INFO L226 Difference]: Without dead ends: 637 [2021-12-06 17:41:35,864 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 [2021-12-06 17:41:35,865 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:35,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 154 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-06 17:41:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-12-06 17:41:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.498422712933754) internal successors, (950), 634 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 950 transitions. [2021-12-06 17:41:35,900 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 950 transitions. Word has length 41 [2021-12-06 17:41:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 950 transitions. [2021-12-06 17:41:35,901 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) [2021-12-06 17:41:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 950 transitions. [2021-12-06 17:41:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:41:35,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:35,902 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] [2021-12-06 17:41:35,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:41:35,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1870212999, now seen corresponding path program 1 times [2021-12-06 17:41:35,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:35,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836759345] [2021-12-06 17:41:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:35,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:35,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836759345] [2021-12-06 17:41:35,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836759345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:35,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:35,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:41:35,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456757971] [2021-12-06 17:41:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:35,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:35,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:35,989 INFO L87 Difference]: Start difference. First operand 635 states and 950 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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) [2021-12-06 17:41:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:36,075 INFO L93 Difference]: Finished difference Result 1251 states and 1880 transitions. [2021-12-06 17:41:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:41:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 [2021-12-06 17:41:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:36,080 INFO L225 Difference]: With dead ends: 1251 [2021-12-06 17:41:36,080 INFO L226 Difference]: Without dead ends: 637 [2021-12-06 17:41:36,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:41:36,083 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 171 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:36,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 195 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-06 17:41:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-12-06 17:41:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4794952681388012) internal successors, (938), 634 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2021-12-06 17:41:36,126 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2021-12-06 17:41:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:36,126 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2021-12-06 17:41:36,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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) [2021-12-06 17:41:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2021-12-06 17:41:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:41:36,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:36,127 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] [2021-12-06 17:41:36,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:41:36,127 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2143937547, now seen corresponding path program 1 times [2021-12-06 17:41:36,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:36,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952671513] [2021-12-06 17:41:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:36,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:36,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:36,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952671513] [2021-12-06 17:41:36,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952671513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:36,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:36,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:41:36,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570562512] [2021-12-06 17:41:36,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:36,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:36,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:36,174 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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) [2021-12-06 17:41:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:36,266 INFO L93 Difference]: Finished difference Result 1249 states and 1855 transitions. [2021-12-06 17:41:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:41:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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 [2021-12-06 17:41:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:36,271 INFO L225 Difference]: With dead ends: 1249 [2021-12-06 17:41:36,271 INFO L226 Difference]: Without dead ends: 635 [2021-12-06 17:41:36,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:41:36,273 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 198 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:36,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-06 17:41:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-12-06 17:41:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4605678233438486) internal successors, (926), 634 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 926 transitions. [2021-12-06 17:41:36,325 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 926 transitions. Word has length 42 [2021-12-06 17:41:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:36,326 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 926 transitions. [2021-12-06 17:41:36,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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) [2021-12-06 17:41:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 926 transitions. [2021-12-06 17:41:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:41:36,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:36,327 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] [2021-12-06 17:41:36,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:41:36,327 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:36,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2021-12-06 17:41:36,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:36,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700819422] [2021-12-06 17:41:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:36,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:36,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:36,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700819422] [2021-12-06 17:41:36,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700819422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:36,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:36,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:41:36,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387832972] [2021-12-06 17:41:36,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:36,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:36,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:36,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:36,400 INFO L87 Difference]: Start difference. First operand 635 states and 926 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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) [2021-12-06 17:41:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:36,528 INFO L93 Difference]: Finished difference Result 1143 states and 1658 transitions. [2021-12-06 17:41:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:41:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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 [2021-12-06 17:41:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:36,536 INFO L225 Difference]: With dead ends: 1143 [2021-12-06 17:41:36,536 INFO L226 Difference]: Without dead ends: 1141 [2021-12-06 17:41:36,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:41:36,538 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 108 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:36,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-12-06 17:41:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 667. [2021-12-06 17:41:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.4324324324324325) internal successors, (954), 666 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 954 transitions. [2021-12-06 17:41:36,601 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 954 transitions. Word has length 42 [2021-12-06 17:41:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:36,601 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 954 transitions. [2021-12-06 17:41:36,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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) [2021-12-06 17:41:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 954 transitions. [2021-12-06 17:41:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:41:36,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:36,603 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:41:36,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:41:36,604 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2021-12-06 17:41:36,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:36,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254284338] [2021-12-06 17:41:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:36,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:41:36,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:36,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254284338] [2021-12-06 17:41:36,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254284338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:36,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:36,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:41:36,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633752108] [2021-12-06 17:41:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:36,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:36,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:36,663 INFO L87 Difference]: Start difference. First operand 667 states and 954 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:36,817 INFO L93 Difference]: Finished difference Result 2735 states and 3928 transitions. [2021-12-06 17:41:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:41:36,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 17:41:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:36,827 INFO L225 Difference]: With dead ends: 2735 [2021-12-06 17:41:36,827 INFO L226 Difference]: Without dead ends: 2089 [2021-12-06 17:41:36,836 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 [2021-12-06 17:41:36,837 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 214 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:36,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 325 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-12-06 17:41:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1311. [2021-12-06 17:41:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.4305343511450381) internal successors, (1874), 1310 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1874 transitions. [2021-12-06 17:41:36,917 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1874 transitions. Word has length 60 [2021-12-06 17:41:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:36,917 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1874 transitions. [2021-12-06 17:41:36,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1874 transitions. [2021-12-06 17:41:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:41:36,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:36,918 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:41:36,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:41:36,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2021-12-06 17:41:36,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694886701] [2021-12-06 17:41:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:36,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:41:36,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694886701] [2021-12-06 17:41:36,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694886701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:36,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:36,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:41:36,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894044596] [2021-12-06 17:41:36,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:36,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:36,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:36,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:36,966 INFO L87 Difference]: Start difference. First operand 1311 states and 1874 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:37,150 INFO L93 Difference]: Finished difference Result 3379 states and 4848 transitions. [2021-12-06 17:41:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:41:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 17:41:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:37,166 INFO L225 Difference]: With dead ends: 3379 [2021-12-06 17:41:37,166 INFO L226 Difference]: Without dead ends: 2733 [2021-12-06 17:41:37,168 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 [2021-12-06 17:41:37,169 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 209 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:37,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 355 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-12-06 17:41:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2279. [2021-12-06 17:41:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.4240561896400352) internal successors, (3244), 2278 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3244 transitions. [2021-12-06 17:41:37,367 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3244 transitions. Word has length 60 [2021-12-06 17:41:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:37,367 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 3244 transitions. [2021-12-06 17:41:37,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3244 transitions. [2021-12-06 17:41:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:41:37,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:37,369 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:41:37,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:41:37,369 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2021-12-06 17:41:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509757193] [2021-12-06 17:41:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:37,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:41:37,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509757193] [2021-12-06 17:41:37,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509757193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:41:37,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:41:37,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:41:37,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338335975] [2021-12-06 17:41:37,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:41:37,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:41:37,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:41:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:41:37,426 INFO L87 Difference]: Start difference. First operand 2279 states and 3244 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:37,687 INFO L93 Difference]: Finished difference Result 3631 states and 5216 transitions. [2021-12-06 17:41:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:41:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 17:41:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:37,701 INFO L225 Difference]: With dead ends: 3631 [2021-12-06 17:41:37,701 INFO L226 Difference]: Without dead ends: 3181 [2021-12-06 17:41:37,703 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 [2021-12-06 17:41:37,704 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 206 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:37,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 338 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:41:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-12-06 17:41:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2727. [2021-12-06 17:41:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4277329420396185) internal successors, (3892), 2726 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3892 transitions. [2021-12-06 17:41:37,903 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3892 transitions. Word has length 60 [2021-12-06 17:41:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3892 transitions. [2021-12-06 17:41:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3892 transitions. [2021-12-06 17:41:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:41:37,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:37,906 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] [2021-12-06 17:41:37,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:41:37,906 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:37,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2021-12-06 17:41:37,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:37,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451507608] [2021-12-06 17:41:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:37,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:38,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451507608] [2021-12-06 17:41:38,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451507608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:41:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440648501] [2021-12-06 17:41:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:38,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:38,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:41:38,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:41:38,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:41:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:41:38,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:38,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:38,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440648501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:38,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:41:38,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 18 [2021-12-06 17:41:38,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948039540] [2021-12-06 17:41:38,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:38,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:41:38,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:41:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:41:38,649 INFO L87 Difference]: Start difference. First operand 2727 states and 3892 transitions. Second operand has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:46,165 INFO L93 Difference]: Finished difference Result 45432 states and 63984 transitions. [2021-12-06 17:41:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-12-06 17:41:46,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 17:41:46,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:46,269 INFO L225 Difference]: With dead ends: 45432 [2021-12-06 17:41:46,269 INFO L226 Difference]: Without dead ends: 42148 [2021-12-06 17:41:46,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15302 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4557, Invalid=30225, Unknown=0, NotChecked=0, Total=34782 [2021-12-06 17:41:46,290 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 7181 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7181 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:46,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7181 Valid, 1294 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:41:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42148 states. [2021-12-06 17:41:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42148 to 20507. [2021-12-06 17:41:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20507 states, 20506 states have (on average 1.3915439383595045) internal successors, (28535), 20506 states have internal predecessors, (28535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20507 states to 20507 states and 28535 transitions. [2021-12-06 17:41:48,031 INFO L78 Accepts]: Start accepts. Automaton has 20507 states and 28535 transitions. Word has length 61 [2021-12-06 17:41:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:48,031 INFO L470 AbstractCegarLoop]: Abstraction has 20507 states and 28535 transitions. [2021-12-06 17:41:48,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20507 states and 28535 transitions. [2021-12-06 17:41:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:41:48,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:48,033 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:41:48,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:41:48,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:48,235 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:41:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash 653717303, now seen corresponding path program 1 times [2021-12-06 17:41:48,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:48,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514469839] [2021-12-06 17:41:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:48,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:48,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514469839] [2021-12-06 17:41:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514469839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:41:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112043137] [2021-12-06 17:41:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:48,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:41:48,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:41:48,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:41:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:41:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:49,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:50,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112043137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:50,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:41:50,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2021-12-06 17:41:50,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561031093] [2021-12-06 17:41:50,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:50,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 17:41:50,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 17:41:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:41:50,292 INFO L87 Difference]: Start difference. First operand 20507 states and 28535 transitions. Second operand has 28 states, 28 states have (on average 6.178571428571429) internal successors, (173), 28 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:49,112 INFO L93 Difference]: Finished difference Result 754600 states and 1001869 transitions. [2021-12-06 17:44:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 888 states. [2021-12-06 17:44:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.178571428571429) internal successors, (173), 28 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 17:44:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:50,611 INFO L225 Difference]: With dead ends: 754600 [2021-12-06 17:44:50,611 INFO L226 Difference]: Without dead ends: 734114 [2021-12-06 17:44:50,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 911 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414698 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=69882, Invalid=762774, Unknown=0, NotChecked=0, Total=832656 [2021-12-06 17:44:50,853 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 19633 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 2643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19633 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 5560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2643 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:50,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19633 Valid, 2169 Invalid, 5560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2643 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 17:44:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734114 states. [2021-12-06 17:45:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734114 to 136639. [2021-12-06 17:45:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136639 states, 136638 states have (on average 1.3666549568933972) internal successors, (186737), 136638 states have internal predecessors, (186737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136639 states to 136639 states and 186737 transitions. [2021-12-06 17:45:14,490 INFO L78 Accepts]: Start accepts. Automaton has 136639 states and 186737 transitions. Word has length 62 [2021-12-06 17:45:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:14,490 INFO L470 AbstractCegarLoop]: Abstraction has 136639 states and 186737 transitions. [2021-12-06 17:45:14,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.178571428571429) internal successors, (173), 28 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 136639 states and 186737 transitions. [2021-12-06 17:45:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:45:14,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:14,493 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:45:14,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 17:45:14,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:45:14,695 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1807663409, now seen corresponding path program 1 times [2021-12-06 17:45:14,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:14,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705117131] [2021-12-06 17:45:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:14,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:14,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705117131] [2021-12-06 17:45:14,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705117131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724882898] [2021-12-06 17:45:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:14,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:14,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:14,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:45:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:45:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:15,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:15,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724882898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 17:45:15,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154716333] [2021-12-06 17:45:15,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:15,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:45:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:45:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:45:15,681 INFO L87 Difference]: Start difference. First operand 136639 states and 186737 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:08,226 INFO L93 Difference]: Finished difference Result 422809 states and 569137 transitions. [2021-12-06 17:46:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 17:46:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 17:46:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:08,726 INFO L225 Difference]: With dead ends: 422809 [2021-12-06 17:46:08,726 INFO L226 Difference]: Without dead ends: 286191 [2021-12-06 17:46:08,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=901, Invalid=2521, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:46:08,952 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1439 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:08,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 1078 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:46:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286191 states. [2021-12-06 17:46:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286191 to 141239. [2021-12-06 17:46:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141239 states, 141238 states have (on average 1.3595420495900536) internal successors, (192019), 141238 states have internal predecessors, (192019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141239 states to 141239 states and 192019 transitions. [2021-12-06 17:46:31,027 INFO L78 Accepts]: Start accepts. Automaton has 141239 states and 192019 transitions. Word has length 62 [2021-12-06 17:46:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:31,028 INFO L470 AbstractCegarLoop]: Abstraction has 141239 states and 192019 transitions. [2021-12-06 17:46:31,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 141239 states and 192019 transitions. [2021-12-06 17:46:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:46:31,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:31,030 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:46:31,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 17:46:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:46:31,232 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1286750416, now seen corresponding path program 1 times [2021-12-06 17:46:31,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:31,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565533848] [2021-12-06 17:46:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:31,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:46:31,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565533848] [2021-12-06 17:46:31,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565533848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:46:31,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:46:31,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:46:31,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151665710] [2021-12-06 17:46:31,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:46:31,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:46:31,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:46:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:46:31,286 INFO L87 Difference]: Start difference. First operand 141239 states and 192019 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:44,388 INFO L93 Difference]: Finished difference Result 233135 states and 316994 transitions. [2021-12-06 17:46:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:46:44,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 17:46:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:44,523 INFO L225 Difference]: With dead ends: 233135 [2021-12-06 17:46:44,523 INFO L226 Difference]: Without dead ends: 91917 [2021-12-06 17:46:44,595 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 [2021-12-06 17:46:44,596 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 50 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:44,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:46:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91917 states. [2021-12-06 17:46:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91917 to 91917. [2021-12-06 17:46:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91917 states, 91916 states have (on average 1.3360459550023935) internal successors, (122804), 91916 states have internal predecessors, (122804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91917 states to 91917 states and 122804 transitions. [2021-12-06 17:46:57,932 INFO L78 Accepts]: Start accepts. Automaton has 91917 states and 122804 transitions. Word has length 63 [2021-12-06 17:46:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:57,932 INFO L470 AbstractCegarLoop]: Abstraction has 91917 states and 122804 transitions. [2021-12-06 17:46:57,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:46:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 91917 states and 122804 transitions. [2021-12-06 17:46:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:46:57,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:57,934 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:46:57,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:46:57,934 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -349929546, now seen corresponding path program 1 times [2021-12-06 17:46:57,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:57,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754932129] [2021-12-06 17:46:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:57,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:58,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754932129] [2021-12-06 17:46:58,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754932129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594288321] [2021-12-06 17:46:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:58,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:58,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:58,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:58,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:46:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:46:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:58,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:59,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594288321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:59,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-06 17:46:59,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286972524] [2021-12-06 17:46:59,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:59,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:46:59,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:46:59,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:46:59,502 INFO L87 Difference]: Start difference. First operand 91917 states and 122804 transitions. Second operand has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:10,519 INFO L93 Difference]: Finished difference Result 424577 states and 563761 transitions. [2021-12-06 17:48:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 17:48:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 17:48:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:11,260 INFO L225 Difference]: With dead ends: 424577 [2021-12-06 17:48:11,260 INFO L226 Difference]: Without dead ends: 373490 [2021-12-06 17:48:11,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2484, Invalid=7818, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 17:48:11,352 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 5359 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5359 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:11,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5359 Valid, 2671 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:48:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373490 states. [2021-12-06 17:48:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373490 to 93661. [2021-12-06 17:48:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93661 states, 93660 states have (on average 1.3390988682468503) internal successors, (125420), 93660 states have internal predecessors, (125420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93661 states to 93661 states and 125420 transitions. [2021-12-06 17:48:30,948 INFO L78 Accepts]: Start accepts. Automaton has 93661 states and 125420 transitions. Word has length 63 [2021-12-06 17:48:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:30,948 INFO L470 AbstractCegarLoop]: Abstraction has 93661 states and 125420 transitions. [2021-12-06 17:48:30,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93661 states and 125420 transitions. [2021-12-06 17:48:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:48:30,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:30,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:30,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:31,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:48:31,152 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash 952391673, now seen corresponding path program 1 times [2021-12-06 17:48:31,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:31,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202703000] [2021-12-06 17:48:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:31,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:31,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:31,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202703000] [2021-12-06 17:48:31,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202703000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:31,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:31,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:48:31,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778355354] [2021-12-06 17:48:31,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:31,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:48:31,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:31,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:48:31,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:31,214 INFO L87 Difference]: Start difference. First operand 93661 states and 125420 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:47,740 INFO L93 Difference]: Finished difference Result 185395 states and 248594 transitions. [2021-12-06 17:48:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:48:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 17:48:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:47,881 INFO L225 Difference]: With dead ends: 185395 [2021-12-06 17:48:47,881 INFO L226 Difference]: Without dead ends: 91755 [2021-12-06 17:48:47,924 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 [2021-12-06 17:48:47,925 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:47,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 168 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91755 states. [2021-12-06 17:49:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91755 to 89425. [2021-12-06 17:49:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89425 states, 89424 states have (on average 1.3201154052603328) internal successors, (118050), 89424 states have internal predecessors, (118050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89425 states to 89425 states and 118050 transitions. [2021-12-06 17:49:04,658 INFO L78 Accepts]: Start accepts. Automaton has 89425 states and 118050 transitions. Word has length 64 [2021-12-06 17:49:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:04,659 INFO L470 AbstractCegarLoop]: Abstraction has 89425 states and 118050 transitions. [2021-12-06 17:49:04,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:49:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 89425 states and 118050 transitions. [2021-12-06 17:49:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:49:04,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:04,660 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] [2021-12-06 17:49:04,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:49:04,660 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash -485003143, now seen corresponding path program 1 times [2021-12-06 17:49:04,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:04,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868486122] [2021-12-06 17:49:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:04,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:05,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868486122] [2021-12-06 17:49:05,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868486122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036793307] [2021-12-06 17:49:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:05,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:05,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:05,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:49:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:49:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:07,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:15,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036793307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:15,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:15,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 20] total 63 [2021-12-06 17:49:15,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22153513] [2021-12-06 17:49:15,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 17:49:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 17:49:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3477, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 17:49:15,610 INFO L87 Difference]: Start difference. First operand 89425 states and 118050 transitions. Second operand has 63 states, 63 states have (on average 2.761904761904762) internal successors, (174), 63 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:30,942 INFO L93 Difference]: Finished difference Result 427071 states and 558538 transitions. [2021-12-06 17:51:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2021-12-06 17:51:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.761904761904762) internal successors, (174), 63 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 17:51:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:31,749 INFO L225 Difference]: With dead ends: 427071 [2021-12-06 17:51:31,749 INFO L226 Difference]: Without dead ends: 402415 [2021-12-06 17:51:31,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50200 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=13696, Invalid=110560, Unknown=0, NotChecked=0, Total=124256 [2021-12-06 17:51:31,842 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 5813 mSDsluCounter, 8973 mSDsCounter, 0 mSdLazyCounter, 6858 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5813 SdHoareTripleChecker+Valid, 9258 SdHoareTripleChecker+Invalid, 7454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 6858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:31,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5813 Valid, 9258 Invalid, 7454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 6858 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-06 17:51:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402415 states. [2021-12-06 17:51:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402415 to 121929. [2021-12-06 17:51:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121929 states, 121928 states have (on average 1.3193606062594319) internal successors, (160867), 121928 states have internal predecessors, (160867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121929 states to 121929 states and 160867 transitions. [2021-12-06 17:52:00,086 INFO L78 Accepts]: Start accepts. Automaton has 121929 states and 160867 transitions. Word has length 64 [2021-12-06 17:52:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:00,086 INFO L470 AbstractCegarLoop]: Abstraction has 121929 states and 160867 transitions. [2021-12-06 17:52:00,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.761904761904762) internal successors, (174), 63 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 121929 states and 160867 transitions. [2021-12-06 17:52:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:52:00,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:00,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:00,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:52:00,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:00,290 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash 225010297, now seen corresponding path program 1 times [2021-12-06 17:52:00,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:00,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911665579] [2021-12-06 17:52:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:00,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:00,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:00,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911665579] [2021-12-06 17:52:00,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911665579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:00,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:00,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:52:00,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810673452] [2021-12-06 17:52:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:00,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:52:00,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:52:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:52:00,325 INFO L87 Difference]: Start difference. First operand 121929 states and 160867 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:13,317 INFO L93 Difference]: Finished difference Result 180891 states and 238370 transitions. [2021-12-06 17:52:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:52:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 17:52:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:13,395 INFO L225 Difference]: With dead ends: 180891 [2021-12-06 17:52:13,395 INFO L226 Difference]: Without dead ends: 58983 [2021-12-06 17:52:13,449 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 [2021-12-06 17:52:13,450 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 29 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:13,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 154 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58983 states. [2021-12-06 17:52:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58983 to 58981. [2021-12-06 17:52:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58981 states, 58980 states have (on average 1.2956086809087826) internal successors, (76415), 58980 states have internal predecessors, (76415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58981 states to 58981 states and 76415 transitions. [2021-12-06 17:52:26,274 INFO L78 Accepts]: Start accepts. Automaton has 58981 states and 76415 transitions. Word has length 64 [2021-12-06 17:52:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:26,275 INFO L470 AbstractCegarLoop]: Abstraction has 58981 states and 76415 transitions. [2021-12-06 17:52:26,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 58981 states and 76415 transitions. [2021-12-06 17:52:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:52:26,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:26,276 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] [2021-12-06 17:52:26,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:52:26,276 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1762634149, now seen corresponding path program 1 times [2021-12-06 17:52:26,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:26,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620030948] [2021-12-06 17:52:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:26,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:52:26,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620030948] [2021-12-06 17:52:26,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620030948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:26,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:26,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:52:26,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411477302] [2021-12-06 17:52:26,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:26,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:52:26,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:52:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:52:26,294 INFO L87 Difference]: Start difference. First operand 58981 states and 76415 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:36,196 INFO L93 Difference]: Finished difference Result 103172 states and 133958 transitions. [2021-12-06 17:52:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:52:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 17:52:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:36,247 INFO L225 Difference]: With dead ends: 103172 [2021-12-06 17:52:36,248 INFO L226 Difference]: Without dead ends: 44212 [2021-12-06 17:52:36,279 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 [2021-12-06 17:52:36,279 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:36,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 116 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44212 states. [2021-12-06 17:52:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44212 to 44212. [2021-12-06 17:52:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44212 states, 44211 states have (on average 1.2786410621790958) internal successors, (56530), 44211 states have internal predecessors, (56530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44212 states to 44212 states and 56530 transitions. [2021-12-06 17:52:46,123 INFO L78 Accepts]: Start accepts. Automaton has 44212 states and 56530 transitions. Word has length 64 [2021-12-06 17:52:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:46,123 INFO L470 AbstractCegarLoop]: Abstraction has 44212 states and 56530 transitions. [2021-12-06 17:52:46,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 44212 states and 56530 transitions. [2021-12-06 17:52:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:52:46,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:46,124 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] [2021-12-06 17:52:46,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:52:46,125 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2113820394, now seen corresponding path program 1 times [2021-12-06 17:52:46,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:46,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781194930] [2021-12-06 17:52:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:46,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:46,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781194930] [2021-12-06 17:52:46,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781194930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106361917] [2021-12-06 17:52:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:46,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:46,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:46,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:46,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:52:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:52:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:47,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:49,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106361917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:49,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:49,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 49 [2021-12-06 17:52:49,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554417969] [2021-12-06 17:52:49,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:49,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:52:49,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:52:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2084, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 17:52:49,037 INFO L87 Difference]: Start difference. First operand 44212 states and 56530 transitions. Second operand has 49 states, 49 states have (on average 3.36734693877551) internal successors, (165), 49 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:46,826 INFO L93 Difference]: Finished difference Result 176246 states and 226525 transitions. [2021-12-06 17:53:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-06 17:53:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.36734693877551) internal successors, (165), 49 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 17:53:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:47,059 INFO L225 Difference]: With dead ends: 176246 [2021-12-06 17:53:47,059 INFO L226 Difference]: Without dead ends: 158224 [2021-12-06 17:53:47,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11326 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=5569, Invalid=29963, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 17:53:47,097 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 3966 mSDsluCounter, 4498 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3966 SdHoareTripleChecker+Valid, 4701 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:47,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3966 Valid, 4701 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 17:53:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158224 states. [2021-12-06 17:53:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158224 to 45213. [2021-12-06 17:53:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45213 states, 45212 states have (on average 1.2810979386003716) internal successors, (57921), 45212 states have internal predecessors, (57921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45213 states to 45213 states and 57921 transitions. [2021-12-06 17:53:59,555 INFO L78 Accepts]: Start accepts. Automaton has 45213 states and 57921 transitions. Word has length 65 [2021-12-06 17:53:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:59,555 INFO L470 AbstractCegarLoop]: Abstraction has 45213 states and 57921 transitions. [2021-12-06 17:53:59,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.36734693877551) internal successors, (165), 49 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 45213 states and 57921 transitions. [2021-12-06 17:53:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:53:59,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:59,556 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] [2021-12-06 17:53:59,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:53:59,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cafb498a-3244-4ee2-82ba-071f4fb83c2c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 17:53:59,758 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:59,759 INFO L85 PathProgramCache]: Analyzing trace with hash -941448499, now seen corresponding path program 1 times [2021-12-06 17:53:59,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:59,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738830345] [2021-12-06 17:53:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:59,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:53:59,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738830345] [2021-12-06 17:53:59,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738830345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:53:59,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:53:59,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:53:59,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599388671] [2021-12-06 17:53:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:53:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:53:59,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:53:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:53:59,810 INFO L87 Difference]: Start difference. First operand 45213 states and 57921 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)