./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3da1085986a33686aa7ffc74caa759bc9bd987d241f97554ff5ad69a436a7e40 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:36:52,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:36:52,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:36:52,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:36:52,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:36:52,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:36:52,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:36:52,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:36:52,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:36:52,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:36:52,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:36:52,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:36:52,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:36:52,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:36:52,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:36:52,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:36:52,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:36:52,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:36:52,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:36:52,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:36:52,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:36:52,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:36:52,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:36:52,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:36:52,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:36:52,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:36:52,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:36:52,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:36:52,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:36:52,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:36:52,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:36:52,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:36:52,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:36:52,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:36:52,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:36:52,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:36:52,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:36:52,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:36:52,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:36:52,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:36:52,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:36:52,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:36:52,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:36:52,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:36:52,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:36:52,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:36:52,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:36:52,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:36:52,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:36:52,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:36:52,463 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:36:52,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:36:52,465 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:36:52,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:36:52,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:36:52,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:36:52,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:36:52,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:36:52,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:36:52,467 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:36:52,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:36:52,467 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:36:52,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:36:52,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:36:52,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:36:52,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:36:52,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:36:52,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:36:52,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:36:52,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:36:52,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:36:52,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:36:52,469 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:36:52,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:36:52,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:36:52,470 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_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3da1085986a33686aa7ffc74caa759bc9bd987d241f97554ff5ad69a436a7e40 [2022-11-20 11:36:52,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:36:52,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:36:52,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:36:52,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:36:52,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:36:52,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-20 11:36:55,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:36:56,150 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:36:56,151 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-20 11:36:56,159 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/data/25333607d/dd2c7e0edb8540c6bb652c151eb098f9/FLAG5cc369a75 [2022-11-20 11:36:56,174 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/data/25333607d/dd2c7e0edb8540c6bb652c151eb098f9 [2022-11-20 11:36:56,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:36:56,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:36:56,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:36:56,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:36:56,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:36:56,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464e8aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56, skipping insertion in model container [2022-11-20 11:36:56,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:36:56,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:36:56,504 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-11-20 11:36:56,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:36:56,566 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:36:56,617 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-11-20 11:36:56,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:36:56,651 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:36:56,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56 WrapperNode [2022-11-20 11:36:56,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:36:56,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:36:56,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:36:56,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:36:56,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,705 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 333 [2022-11-20 11:36:56,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:36:56,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:36:56,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:36:56,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:36:56,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,730 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:36:56,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:36:56,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:36:56,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:36:56,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (1/1) ... [2022-11-20 11:36:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:36:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:56,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:36:56,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:36:56,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:36:56,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:36:56,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:36:56,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:36:56,940 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:36:56,942 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:36:57,440 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:36:57,448 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:36:57,448 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 11:36:57,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:57 BoogieIcfgContainer [2022-11-20 11:36:57,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:36:57,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:36:57,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:36:57,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:36:57,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:56" (1/3) ... [2022-11-20 11:36:57,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12434818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:57, skipping insertion in model container [2022-11-20 11:36:57,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:56" (2/3) ... [2022-11-20 11:36:57,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12434818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:57, skipping insertion in model container [2022-11-20 11:36:57,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:57" (3/3) ... [2022-11-20 11:36:57,461 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-20 11:36:57,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:36:57,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:36:57,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:36:57,540 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@648fb341, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:36:57,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:36:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:36:57,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:57,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:57,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2022-11-20 11:36:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821836080] [2022-11-20 11:36:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:57,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821836080] [2022-11-20 11:36:57,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821836080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:57,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:57,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447793675] [2022-11-20 11:36:57,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:57,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:58,006 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 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 12.333333333333334) 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) [2022-11-20 11:36:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:58,088 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2022-11-20 11:36:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:58,096 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 [2022-11-20 11:36:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:58,106 INFO L225 Difference]: With dead ends: 199 [2022-11-20 11:36:58,106 INFO L226 Difference]: Without dead ends: 128 [2022-11-20 11:36:58,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:58,117 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 101 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 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 [2022-11-20 11:36:58,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:36:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-20 11:36:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-20 11:36:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.504) internal successors, (188), 125 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2022-11-20 11:36:58,171 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2022-11-20 11:36:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:58,172 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2022-11-20 11:36:58,172 INFO L496 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) [2022-11-20 11:36:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2022-11-20 11:36:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:36:58,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:58,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:58,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:36:58,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2022-11-20 11:36:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245851546] [2022-11-20 11:36:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:58,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:58,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245851546] [2022-11-20 11:36:58,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245851546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:58,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:58,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575225223] [2022-11-20 11:36:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:58,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:58,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:58,332 INFO L87 Difference]: Start difference. First operand 126 states and 188 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) [2022-11-20 11:36:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:58,442 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2022-11-20 11:36:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:58,443 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 [2022-11-20 11:36:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:58,445 INFO L225 Difference]: With dead ends: 306 [2022-11-20 11:36:58,445 INFO L226 Difference]: Without dead ends: 200 [2022-11-20 11:36:58,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:58,447 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 254 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 [2022-11-20 11:36:58,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 254 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:36:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-20 11:36:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2022-11-20 11:36:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 197 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2022-11-20 11:36:58,517 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2022-11-20 11:36:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:58,518 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2022-11-20 11:36:58,523 INFO L496 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) [2022-11-20 11:36:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2022-11-20 11:36:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:36:58,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:58,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:58,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:36:58,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2022-11-20 11:36:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939776793] [2022-11-20 11:36:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:58,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939776793] [2022-11-20 11:36:58,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939776793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:58,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:58,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:58,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517716029] [2022-11-20 11:36:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:58,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:58,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:58,649 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2022-11-20 11:36:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:58,728 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2022-11-20 11:36:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 [2022-11-20 11:36:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:58,732 INFO L225 Difference]: With dead ends: 490 [2022-11-20 11:36:58,732 INFO L226 Difference]: Without dead ends: 312 [2022-11-20 11:36:58,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:58,734 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 239 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 [2022-11-20 11:36:58,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 239 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:36:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-20 11:36:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2022-11-20 11:36:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.5307443365695792) internal successors, (473), 309 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2022-11-20 11:36:58,821 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2022-11-20 11:36:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:58,822 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2022-11-20 11:36:58,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2022-11-20 11:36:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2022-11-20 11:36:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 11:36:58,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:58,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:36:58,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:58,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2022-11-20 11:36:58,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472520301] [2022-11-20 11:36:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:58,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:59,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472520301] [2022-11-20 11:36:59,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472520301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:59,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:59,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:36:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078576869] [2022-11-20 11:36:59,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:36:59,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:36:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:59,041 INFO L87 Difference]: Start difference. First operand 310 states and 473 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:59,282 INFO L93 Difference]: Finished difference Result 1470 states and 2285 transitions. [2022-11-20 11:36:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:36:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2022-11-20 11:36:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:59,288 INFO L225 Difference]: With dead ends: 1470 [2022-11-20 11:36:59,289 INFO L226 Difference]: Without dead ends: 1180 [2022-11-20 11:36:59,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:36:59,304 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 486 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:59,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 660 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:36:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-20 11:36:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 598. [2022-11-20 11:36:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5226130653266332) internal successors, (909), 597 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 909 transitions. [2022-11-20 11:36:59,426 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 909 transitions. Word has length 40 [2022-11-20 11:36:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:59,428 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 909 transitions. [2022-11-20 11:36:59,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 909 transitions. [2022-11-20 11:36:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:36:59,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:59,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:59,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:36:59,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:36:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1289857042, now seen corresponding path program 1 times [2022-11-20 11:36:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:59,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15651877] [2022-11-20 11:36:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:59,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15651877] [2022-11-20 11:36:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15651877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:59,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:59,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:36:59,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881853704] [2022-11-20 11:36:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:36:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:36:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:59,624 INFO L87 Difference]: Start difference. First operand 598 states and 909 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) [2022-11-20 11:37:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:00,027 INFO L93 Difference]: Finished difference Result 2068 states and 3144 transitions. [2022-11-20 11:37:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:37:00,028 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 [2022-11-20 11:37:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:00,034 INFO L225 Difference]: With dead ends: 2068 [2022-11-20 11:37:00,035 INFO L226 Difference]: Without dead ends: 1490 [2022-11-20 11:37:00,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:37:00,041 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 317 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:00,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 362 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-20 11:37:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1486. [2022-11-20 11:37:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.5063973063973064) internal successors, (2237), 1485 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2237 transitions. [2022-11-20 11:37:00,375 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2237 transitions. Word has length 41 [2022-11-20 11:37:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:00,376 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2237 transitions. [2022-11-20 11:37:00,380 INFO L496 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) [2022-11-20 11:37:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2237 transitions. [2022-11-20 11:37:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:37:00,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:00,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:37:00,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash 97793413, now seen corresponding path program 1 times [2022-11-20 11:37:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:00,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196675679] [2022-11-20 11:37:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:00,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196675679] [2022-11-20 11:37:00,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196675679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:00,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:00,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:37:00,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16471077] [2022-11-20 11:37:00,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:00,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:37:00,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:00,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:37:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:37:00,479 INFO L87 Difference]: Start difference. First operand 1486 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:01,282 INFO L93 Difference]: Finished difference Result 4418 states and 6671 transitions. [2022-11-20 11:37:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:37:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:37:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:01,294 INFO L225 Difference]: With dead ends: 4418 [2022-11-20 11:37:01,294 INFO L226 Difference]: Without dead ends: 2952 [2022-11-20 11:37:01,296 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:37:01,298 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:01,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 139 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-11-20 11:37:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2950. [2022-11-20 11:37:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 1.4991522550016956) internal successors, (4421), 2949 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4421 transitions. [2022-11-20 11:37:01,821 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4421 transitions. Word has length 43 [2022-11-20 11:37:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:01,823 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 4421 transitions. [2022-11-20 11:37:01,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4421 transitions. [2022-11-20 11:37:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:37:01,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:01,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:01,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:37:01,826 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2022-11-20 11:37:01,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:01,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808622309] [2022-11-20 11:37:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:01,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808622309] [2022-11-20 11:37:02,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808622309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:02,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:02,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:37:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403504402] [2022-11-20 11:37:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:02,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:37:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:37:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:37:02,093 INFO L87 Difference]: Start difference. First operand 2950 states and 4421 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:03,119 INFO L93 Difference]: Finished difference Result 6072 states and 9014 transitions. [2022-11-20 11:37:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:37:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:37:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:03,143 INFO L225 Difference]: With dead ends: 6072 [2022-11-20 11:37:03,143 INFO L226 Difference]: Without dead ends: 6070 [2022-11-20 11:37:03,148 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:37:03,149 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:03,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 571 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2022-11-20 11:37:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 3142. [2022-11-20 11:37:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.4686405603311048) internal successors, (4613), 3141 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4613 transitions. [2022-11-20 11:37:03,839 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4613 transitions. Word has length 43 [2022-11-20 11:37:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:03,840 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4613 transitions. [2022-11-20 11:37:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4613 transitions. [2022-11-20 11:37:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:37:03,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:03,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:37:03,842 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2022-11-20 11:37:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:03,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100968257] [2022-11-20 11:37:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:03,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:03,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:03,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100968257] [2022-11-20 11:37:03,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100968257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:03,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:03,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759908699] [2022-11-20 11:37:03,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:03,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:03,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:03,925 INFO L87 Difference]: Start difference. First operand 3142 states and 4613 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:04,662 INFO L93 Difference]: Finished difference Result 7604 states and 11171 transitions. [2022-11-20 11:37:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:04,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 11:37:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:04,677 INFO L225 Difference]: With dead ends: 7604 [2022-11-20 11:37:04,678 INFO L226 Difference]: Without dead ends: 4482 [2022-11-20 11:37:04,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:04,683 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 66 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:04,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2022-11-20 11:37:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 4480. [2022-11-20 11:37:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 1.4594775619557938) internal successors, (6537), 4479 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6537 transitions. [2022-11-20 11:37:05,462 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6537 transitions. Word has length 44 [2022-11-20 11:37:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:05,462 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 6537 transitions. [2022-11-20 11:37:05,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6537 transitions. [2022-11-20 11:37:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 11:37:05,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:05,466 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:37:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:37:05,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2022-11-20 11:37:05,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472894539] [2022-11-20 11:37:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:05,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:05,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472894539] [2022-11-20 11:37:05,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472894539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:05,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112332931] [2022-11-20 11:37:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:05,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:05,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:05,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:37:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:37:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:37:06,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:37:06,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112332931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:06,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:06,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2022-11-20 11:37:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375438258] [2022-11-20 11:37:06,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:06,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:37:06,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:37:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:37:06,617 INFO L87 Difference]: Start difference. First operand 4480 states and 6537 transitions. Second operand has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:19,781 INFO L93 Difference]: Finished difference Result 40883 states and 58845 transitions. [2022-11-20 11:37:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-20 11:37:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 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 [2022-11-20 11:37:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:19,896 INFO L225 Difference]: With dead ends: 40883 [2022-11-20 11:37:19,896 INFO L226 Difference]: Without dead ends: 36909 [2022-11-20 11:37:19,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9343 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3405, Invalid=18057, Unknown=0, NotChecked=0, Total=21462 [2022-11-20 11:37:19,913 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 7071 mSDsluCounter, 2166 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7071 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:19,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7071 Valid, 2483 Invalid, 2963 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [60 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 11:37:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2022-11-20 11:37:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 15628. [2022-11-20 11:37:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15628 states, 15627 states have (on average 1.4402636462532796) internal successors, (22507), 15627 states have internal predecessors, (22507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 22507 transitions. [2022-11-20 11:37:23,368 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 22507 transitions. Word has length 61 [2022-11-20 11:37:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:23,369 INFO L495 AbstractCegarLoop]: Abstraction has 15628 states and 22507 transitions. [2022-11-20 11:37:23,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 22507 transitions. [2022-11-20 11:37:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:37:23,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:23,374 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:37:23,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:37:23,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317189c3-b86f-460f-a3c8-b16ce9c41c81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:23,579 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2022-11-20 11:37:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605373036] [2022-11-20 11:37:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:23,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:23,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605373036] [2022-11-20 11:37:23,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605373036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:23,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:23,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343031210] [2022-11-20 11:37:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:23,648 INFO L87 Difference]: Start difference. First operand 15628 states and 22507 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:26,319 INFO L93 Difference]: Finished difference Result 25124 states and 35975 transitions. [2022-11-20 11:37:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-20 11:37:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:26,357 INFO L225 Difference]: With dead ends: 25124 [2022-11-20 11:37:26,357 INFO L226 Difference]: Without dead ends: 16161 [2022-11-20 11:37:26,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:26,368 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 67 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:26,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 265 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16161 states. [2022-11-20 11:37:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16161 to 15717. [2022-11-20 11:37:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15717 states, 15716 states have (on average 1.4122550267243574) internal successors, (22195), 15716 states have internal predecessors, (22195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15717 states to 15717 states and 22195 transitions. [2022-11-20 11:37:29,658 INFO L78 Accepts]: Start accepts. Automaton has 15717 states and 22195 transitions. Word has length 62 [2022-11-20 11:37:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:29,659 INFO L495 AbstractCegarLoop]: Abstraction has 15717 states and 22195 transitions. [2022-11-20 11:37:29,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 15717 states and 22195 transitions. [2022-11-20 11:37:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:37:29,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:29,662 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:37:29,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:37:29,663 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2941002, now seen corresponding path program 1 times [2022-11-20 11:37:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406349017] [2022-11-20 11:37:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:29,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406349017] [2022-11-20 11:37:29,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406349017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:29,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:29,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005624802] [2022-11-20 11:37:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:29,717 INFO L87 Difference]: Start difference. First operand 15717 states and 22195 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:33,558 INFO L93 Difference]: Finished difference Result 39144 states and 54917 transitions. [2022-11-20 11:37:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-20 11:37:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:33,635 INFO L225 Difference]: With dead ends: 39144 [2022-11-20 11:37:33,636 INFO L226 Difference]: Without dead ends: 26345 [2022-11-20 11:37:33,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:33,653 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 63 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:33,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 222 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26345 states. [2022-11-20 11:37:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26345 to 26294. [2022-11-20 11:37:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26294 states, 26293 states have (on average 1.3832198684060397) internal successors, (36369), 26293 states have internal predecessors, (36369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26294 states to 26294 states and 36369 transitions. [2022-11-20 11:37:38,023 INFO L78 Accepts]: Start accepts. Automaton has 26294 states and 36369 transitions. Word has length 62 [2022-11-20 11:37:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:38,024 INFO L495 AbstractCegarLoop]: Abstraction has 26294 states and 36369 transitions. [2022-11-20 11:37:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 26294 states and 36369 transitions. [2022-11-20 11:37:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:37:38,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:38,028 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:37:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:37:38,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 954450183, now seen corresponding path program 1 times [2022-11-20 11:37:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:38,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862354956] [2022-11-20 11:37:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:38,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862354956] [2022-11-20 11:37:38,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862354956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:38,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:38,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:38,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714387446] [2022-11-20 11:37:38,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:38,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:38,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:38,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:38,084 INFO L87 Difference]: Start difference. First operand 26294 states and 36369 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:42,333 INFO L93 Difference]: Finished difference Result 53591 states and 73937 transitions. [2022-11-20 11:37:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-20 11:37:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:42,395 INFO L225 Difference]: With dead ends: 53591 [2022-11-20 11:37:42,395 INFO L226 Difference]: Without dead ends: 29492 [2022-11-20 11:37:42,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:42,421 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 266 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29492 states. [2022-11-20 11:37:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29492 to 26067. [2022-11-20 11:37:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26067 states, 26066 states have (on average 1.364881454768664) internal successors, (35577), 26066 states have internal predecessors, (35577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26067 states to 26067 states and 35577 transitions. [2022-11-20 11:37:46,357 INFO L78 Accepts]: Start accepts. Automaton has 26067 states and 35577 transitions. Word has length 62 [2022-11-20 11:37:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:46,357 INFO L495 AbstractCegarLoop]: Abstraction has 26067 states and 35577 transitions. [2022-11-20 11:37:46,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26067 states and 35577 transitions. [2022-11-20 11:37:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:37:46,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:46,363 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:37:46,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:37:46,364 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2022-11-20 11:37:46,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:46,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657933551] [2022-11-20 11:37:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:46,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:37:46,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657933551] [2022-11-20 11:37:46,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657933551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:46,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:46,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:37:46,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125538449] [2022-11-20 11:37:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:46,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:37:46,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:37:46,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:37:46,457 INFO L87 Difference]: Start difference. First operand 26067 states and 35577 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) [2022-11-20 11:37:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:52,716 INFO L93 Difference]: Finished difference Result 49877 states and 68699 transitions. [2022-11-20 11:37:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:37:52,716 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 62 [2022-11-20 11:37:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:52,804 INFO L225 Difference]: With dead ends: 49877 [2022-11-20 11:37:52,804 INFO L226 Difference]: Without dead ends: 42341 [2022-11-20 11:37:52,823 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:37:52,824 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 341 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:52,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 551 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42341 states. [2022-11-20 11:37:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42341 to 33261. [2022-11-20 11:37:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33261 states, 33260 states have (on average 1.3632591701743837) internal successors, (45342), 33260 states have internal predecessors, (45342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33261 states to 33261 states and 45342 transitions. [2022-11-20 11:37:57,975 INFO L78 Accepts]: Start accepts. Automaton has 33261 states and 45342 transitions. Word has length 62 [2022-11-20 11:37:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:57,975 INFO L495 AbstractCegarLoop]: Abstraction has 33261 states and 45342 transitions. [2022-11-20 11:37:57,975 INFO L496 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) [2022-11-20 11:37:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 33261 states and 45342 transitions. [2022-11-20 11:37:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:37:57,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:57,979 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:37:57,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:37:57,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:37:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2022-11-20 11:37:57,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:57,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697541089] [2022-11-20 11:37:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:37:58,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697541089] [2022-11-20 11:37:58,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697541089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:58,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:58,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:37:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738600392] [2022-11-20 11:37:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:58,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:37:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:37:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:37:58,093 INFO L87 Difference]: Start difference. First operand 33261 states and 45342 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:38:05,272 INFO L93 Difference]: Finished difference Result 57850 states and 79500 transitions. [2022-11-20 11:38:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:38:05,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-20 11:38:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:38:05,348 INFO L225 Difference]: With dead ends: 57850 [2022-11-20 11:38:05,348 INFO L226 Difference]: Without dead ends: 47596 [2022-11-20 11:38:05,362 INFO L412 NwaCegarLoop]: 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 [2022-11-20 11:38:05,363 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 336 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:38:05,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 577 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:38:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47596 states. [2022-11-20 11:38:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47596 to 41575. [2022-11-20 11:38:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41575 states, 41574 states have (on average 1.3585173425698753) internal successors, (56479), 41574 states have internal predecessors, (56479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41575 states to 41575 states and 56479 transitions. [2022-11-20 11:38:12,533 INFO L78 Accepts]: Start accepts. Automaton has 41575 states and 56479 transitions. Word has length 62 [2022-11-20 11:38:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:38:12,533 INFO L495 AbstractCegarLoop]: Abstraction has 41575 states and 56479 transitions. [2022-11-20 11:38:12,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 41575 states and 56479 transitions. [2022-11-20 11:38:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:38:12,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:38:12,539 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:38:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:38:12,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:38:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash 901849755, now seen corresponding path program 1 times [2022-11-20 11:38:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:12,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286226989] [2022-11-20 11:38:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:38:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286226989] [2022-11-20 11:38:12,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286226989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:12,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:12,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859217668] [2022-11-20 11:38:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:12,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:12,601 INFO L87 Difference]: Start difference. First operand 41575 states and 56479 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)