./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/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_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/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_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/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 1c0cc6929709cefe19ab2aef19e8ee66797622b8a8e015c421c466573f22c0b0 --- 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 12:45:48,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:45:48,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:45:48,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:45:48,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:45:48,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:45:48,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:45:48,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:45:48,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:45:48,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:45:48,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:45:48,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:45:48,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:45:48,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:45:48,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:45:48,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:45:48,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:45:48,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:45:48,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:45:48,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:45:48,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:45:48,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:45:48,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:45:48,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:45:48,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:45:48,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:45:48,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:45:48,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:45:48,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:45:48,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:45:48,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:45:48,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:45:48,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:45:48,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:45:48,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:45:48,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:45:48,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:45:48,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:45:48,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:45:48,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:45:48,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:45:48,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:45:48,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:45:48,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:45:48,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:45:48,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:45:48,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:45:48,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:45:48,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:45:48,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:45:48,363 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:45:48,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:45:48,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:45:48,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:45:48,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:45:48,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:45:48,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:45:48,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:45:48,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:45:48,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:45:48,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:45:48,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:45:48,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:45:48,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:45:48,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:45:48,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:45:48,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:45:48,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:45:48,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:45:48,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:45:48,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:45:48,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:45:48,370 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:45:48,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:45:48,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:45:48,371 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_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c0cc6929709cefe19ab2aef19e8ee66797622b8a8e015c421c466573f22c0b0 [2022-11-20 12:45:48,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:45:48,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:45:48,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:45:48,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:45:48,650 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:45:48,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2022-11-20 12:45:51,764 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:45:52,169 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:45:52,170 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2022-11-20 12:45:52,188 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/data/c2bcc5c8e/d8df803f499e4150ab7d363c64eb3610/FLAG9fb017125 [2022-11-20 12:45:52,207 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/data/c2bcc5c8e/d8df803f499e4150ab7d363c64eb3610 [2022-11-20 12:45:52,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:45:52,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:45:52,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:45:52,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:45:52,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:45:52,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:45:52" (1/1) ... [2022-11-20 12:45:52,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cccff70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:52, skipping insertion in model container [2022-11-20 12:45:52,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:45:52" (1/1) ... [2022-11-20 12:45:52,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:45:52,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:45:52,911 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_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/sv-benchmarks/c/eca-rers2012/Problem03_label37.c[54326,54339] [2022-11-20 12:45:52,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:45:52,973 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:45:53,348 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_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/sv-benchmarks/c/eca-rers2012/Problem03_label37.c[54326,54339] [2022-11-20 12:45:53,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:45:53,390 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:45:53,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53 WrapperNode [2022-11-20 12:45:53,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:45:53,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:45:53,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:45:53,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:45:53,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,559 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-20 12:45:53,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:45:53,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:45:53,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:45:53,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:45:53,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:45:53,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:45:53,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:45:53,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:45:53,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (1/1) ... [2022-11-20 12:45:53,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:45:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:53,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:45:53,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:45:53,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:45:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:45:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:45:53,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:45:53,878 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:45:53,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:45:55,921 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:45:55,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:45:55,931 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 12:45:55,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:45:55 BoogieIcfgContainer [2022-11-20 12:45:55,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:45:55,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:45:55,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:45:55,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:45:55,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:45:52" (1/3) ... [2022-11-20 12:45:55,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12188d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:45:55, skipping insertion in model container [2022-11-20 12:45:55,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:53" (2/3) ... [2022-11-20 12:45:55,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12188d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:45:55, skipping insertion in model container [2022-11-20 12:45:55,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:45:55" (3/3) ... [2022-11-20 12:45:55,946 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label37.c [2022-11-20 12:45:55,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:45:55,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:45:56,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:56,052 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;@5db023f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:56,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:45:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-20 12:45:56,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:56,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:56,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash -448345333, now seen corresponding path program 1 times [2022-11-20 12:45:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:56,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640064968] [2022-11-20 12:45:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:57,055 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 12:45:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:57,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640064968] [2022-11-20 12:45:57,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640064968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:57,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:57,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549746357] [2022-11-20 12:45:57,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:57,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:57,109 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 12:45:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:58,469 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-11-20 12:45:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2022-11-20 12:45:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:58,485 INFO L225 Difference]: With dead ends: 864 [2022-11-20 12:45:58,486 INFO L226 Difference]: Without dead ends: 468 [2022-11-20 12:45:58,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:58,493 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:58,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:45:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-20 12:45:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-11-20 12:45:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 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 12:45:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-11-20 12:45:58,556 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 149 [2022-11-20 12:45:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:58,557 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-11-20 12:45:58,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 12:45:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-11-20 12:45:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-20 12:45:58,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:58,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:45:58,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash 753132603, now seen corresponding path program 1 times [2022-11-20 12:45:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:58,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752022251] [2022-11-20 12:45:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752022251] [2022-11-20 12:45:58,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752022251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:58,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:58,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887575673] [2022-11-20 12:45:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:58,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:58,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:58,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:58,898 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 12:45:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:59,864 INFO L93 Difference]: Finished difference Result 1328 states and 2168 transitions. [2022-11-20 12:45:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2022-11-20 12:45:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:59,881 INFO L225 Difference]: With dead ends: 1328 [2022-11-20 12:45:59,883 INFO L226 Difference]: Without dead ends: 876 [2022-11-20 12:45:59,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:59,888 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:59,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 162 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:45:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-20 12:45:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 874. [2022-11-20 12:45:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.5211912943871706) internal successors, (1328), 873 states have internal predecessors, (1328), 0 states have call successors, (0), 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 12:45:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1328 transitions. [2022-11-20 12:45:59,925 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1328 transitions. Word has length 154 [2022-11-20 12:45:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:59,926 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1328 transitions. [2022-11-20 12:45:59,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 12:45:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1328 transitions. [2022-11-20 12:45:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-20 12:45:59,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:59,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:45:59,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1351745228, now seen corresponding path program 1 times [2022-11-20 12:45:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:59,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225226526] [2022-11-20 12:45:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:00,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:00,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225226526] [2022-11-20 12:46:00,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225226526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:00,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:00,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:46:00,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452857632] [2022-11-20 12:46:00,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:00,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:00,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:00,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:00,187 INFO L87 Difference]: Start difference. First operand 874 states and 1328 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:01,161 INFO L93 Difference]: Finished difference Result 2575 states and 3932 transitions. [2022-11-20 12:46:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2022-11-20 12:46:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:01,168 INFO L225 Difference]: With dead ends: 2575 [2022-11-20 12:46:01,168 INFO L226 Difference]: Without dead ends: 1703 [2022-11-20 12:46:01,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:01,179 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:01,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-11-20 12:46:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2022-11-20 12:46:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4976275207591934) internal successors, (2525), 1686 states have internal predecessors, (2525), 0 states have call successors, (0), 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 12:46:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2525 transitions. [2022-11-20 12:46:01,241 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2525 transitions. Word has length 157 [2022-11-20 12:46:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:01,243 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2525 transitions. [2022-11-20 12:46:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2525 transitions. [2022-11-20 12:46:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-20 12:46:01,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:01,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:01,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:46:01,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:01,258 INFO L85 PathProgramCache]: Analyzing trace with hash -158085883, now seen corresponding path program 1 times [2022-11-20 12:46:01,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:01,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913741035] [2022-11-20 12:46:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:01,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:46:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913741035] [2022-11-20 12:46:01,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913741035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:01,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:01,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093282927] [2022-11-20 12:46:01,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:01,551 INFO L87 Difference]: Start difference. First operand 1687 states and 2525 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 12:46:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:02,533 INFO L93 Difference]: Finished difference Result 4999 states and 7494 transitions. [2022-11-20 12:46:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 169 [2022-11-20 12:46:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:02,545 INFO L225 Difference]: With dead ends: 4999 [2022-11-20 12:46:02,545 INFO L226 Difference]: Without dead ends: 3314 [2022-11-20 12:46:02,547 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 12:46:02,548 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:02,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2022-11-20 12:46:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2906. [2022-11-20 12:46:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2906 states, 2905 states have (on average 1.351118760757315) internal successors, (3925), 2905 states have internal predecessors, (3925), 0 states have call successors, (0), 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 12:46:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 3925 transitions. [2022-11-20 12:46:02,615 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 3925 transitions. Word has length 169 [2022-11-20 12:46:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:02,615 INFO L495 AbstractCegarLoop]: Abstraction has 2906 states and 3925 transitions. [2022-11-20 12:46:02,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 12:46:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 3925 transitions. [2022-11-20 12:46:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 12:46:02,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:02,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:46:02,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1595293704, now seen corresponding path program 1 times [2022-11-20 12:46:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:02,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361303570] [2022-11-20 12:46:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:02,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:03,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:03,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361303570] [2022-11-20 12:46:03,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361303570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:03,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:03,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:46:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958004758] [2022-11-20 12:46:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:03,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:03,092 INFO L87 Difference]: Start difference. First operand 2906 states and 3925 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 12:46:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:04,080 INFO L93 Difference]: Finished difference Result 8681 states and 11733 transitions. [2022-11-20 12:46:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2022-11-20 12:46:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:04,102 INFO L225 Difference]: With dead ends: 8681 [2022-11-20 12:46:04,103 INFO L226 Difference]: Without dead ends: 5777 [2022-11-20 12:46:04,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:04,110 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:04,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 162 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2022-11-20 12:46:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5768. [2022-11-20 12:46:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.33674354083579) internal successors, (7709), 5767 states have internal predecessors, (7709), 0 states have call successors, (0), 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 12:46:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7709 transitions. [2022-11-20 12:46:04,301 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7709 transitions. Word has length 172 [2022-11-20 12:46:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:04,303 INFO L495 AbstractCegarLoop]: Abstraction has 5768 states and 7709 transitions. [2022-11-20 12:46:04,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 12:46:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7709 transitions. [2022-11-20 12:46:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-20 12:46:04,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:04,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:46:04,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1666602739, now seen corresponding path program 1 times [2022-11-20 12:46:04,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:04,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092634711] [2022-11-20 12:46:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:04,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:46:04,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:04,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092634711] [2022-11-20 12:46:04,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092634711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:04,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:04,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:46:04,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009744405] [2022-11-20 12:46:04,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:04,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:04,880 INFO L87 Difference]: Start difference. First operand 5768 states and 7709 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:05,912 INFO L93 Difference]: Finished difference Result 15634 states and 21101 transitions. [2022-11-20 12:46:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-11-20 12:46:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:05,945 INFO L225 Difference]: With dead ends: 15634 [2022-11-20 12:46:05,945 INFO L226 Difference]: Without dead ends: 9868 [2022-11-20 12:46:05,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:05,953 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:05,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 188 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2022-11-20 12:46:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9643. [2022-11-20 12:46:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9643 states, 9642 states have (on average 1.356461315079859) internal successors, (13079), 9642 states have internal predecessors, (13079), 0 states have call successors, (0), 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 12:46:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 13079 transitions. [2022-11-20 12:46:06,160 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 13079 transitions. Word has length 192 [2022-11-20 12:46:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:06,160 INFO L495 AbstractCegarLoop]: Abstraction has 9643 states and 13079 transitions. [2022-11-20 12:46:06,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 13079 transitions. [2022-11-20 12:46:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-20 12:46:06,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:06,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:06,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:46:06,175 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:06,175 INFO L85 PathProgramCache]: Analyzing trace with hash 566773011, now seen corresponding path program 1 times [2022-11-20 12:46:06,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474919447] [2022-11-20 12:46:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:06,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 12:46:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474919447] [2022-11-20 12:46:06,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474919447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:06,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:06,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:46:06,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140376193] [2022-11-20 12:46:06,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:06,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:06,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:06,759 INFO L87 Difference]: Start difference. First operand 9643 states and 13079 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 12:46:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:07,925 INFO L93 Difference]: Finished difference Result 22544 states and 30610 transitions. [2022-11-20 12:46:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 194 [2022-11-20 12:46:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:07,964 INFO L225 Difference]: With dead ends: 22544 [2022-11-20 12:46:07,965 INFO L226 Difference]: Without dead ends: 12903 [2022-11-20 12:46:07,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:07,975 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:07,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 173 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:46:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12903 states. [2022-11-20 12:46:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12903 to 12891. [2022-11-20 12:46:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 1.3324282389449185) internal successors, (17175), 12890 states have internal predecessors, (17175), 0 states have call successors, (0), 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 12:46:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 17175 transitions. [2022-11-20 12:46:08,260 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 17175 transitions. Word has length 194 [2022-11-20 12:46:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:08,262 INFO L495 AbstractCegarLoop]: Abstraction has 12891 states and 17175 transitions. [2022-11-20 12:46:08,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 12:46:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 17175 transitions. [2022-11-20 12:46:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-20 12:46:08,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:08,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:08,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:46:08,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash -851713474, now seen corresponding path program 1 times [2022-11-20 12:46:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:08,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238442276] [2022-11-20 12:46:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 12:46:08,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:08,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238442276] [2022-11-20 12:46:08,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238442276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:08,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:08,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:46:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064648150] [2022-11-20 12:46:08,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:08,907 INFO L87 Difference]: Start difference. First operand 12891 states and 17175 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 12:46:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:09,946 INFO L93 Difference]: Finished difference Result 28632 states and 37901 transitions. [2022-11-20 12:46:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-11-20 12:46:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:09,978 INFO L225 Difference]: With dead ends: 28632 [2022-11-20 12:46:09,978 INFO L226 Difference]: Without dead ends: 16353 [2022-11-20 12:46:09,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:09,991 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 205 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:09,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 159 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16353 states. [2022-11-20 12:46:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16353 to 16350. [2022-11-20 12:46:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16349 states have (on average 1.313719493547006) internal successors, (21478), 16349 states have internal predecessors, (21478), 0 states have call successors, (0), 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 12:46:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 21478 transitions. [2022-11-20 12:46:10,286 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 21478 transitions. Word has length 195 [2022-11-20 12:46:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:10,286 INFO L495 AbstractCegarLoop]: Abstraction has 16350 states and 21478 transitions. [2022-11-20 12:46:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 12:46:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 21478 transitions. [2022-11-20 12:46:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-20 12:46:10,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:10,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:46:10,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash -649385798, now seen corresponding path program 1 times [2022-11-20 12:46:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:10,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185914170] [2022-11-20 12:46:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 12:46:10,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185914170] [2022-11-20 12:46:10,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185914170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:10,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:10,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848912649] [2022-11-20 12:46:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:10,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:10,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:10,684 INFO L87 Difference]: Start difference. First operand 16350 states and 21478 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:11,799 INFO L93 Difference]: Finished difference Result 37380 states and 48886 transitions. [2022-11-20 12:46:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-11-20 12:46:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:11,838 INFO L225 Difference]: With dead ends: 37380 [2022-11-20 12:46:11,839 INFO L226 Difference]: Without dead ends: 21642 [2022-11-20 12:46:11,853 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 12:46:11,855 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:11,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 424 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21642 states. [2022-11-20 12:46:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21642 to 21638. [2022-11-20 12:46:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21638 states, 21637 states have (on average 1.2715256273975135) internal successors, (27512), 21637 states have internal predecessors, (27512), 0 states have call successors, (0), 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 12:46:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21638 states to 21638 states and 27512 transitions. [2022-11-20 12:46:12,363 INFO L78 Accepts]: Start accepts. Automaton has 21638 states and 27512 transitions. Word has length 197 [2022-11-20 12:46:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:12,367 INFO L495 AbstractCegarLoop]: Abstraction has 21638 states and 27512 transitions. [2022-11-20 12:46:12,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 21638 states and 27512 transitions. [2022-11-20 12:46:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-20 12:46:12,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:12,394 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:12,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:46:12,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash 302105854, now seen corresponding path program 1 times [2022-11-20 12:46:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385310744] [2022-11-20 12:46:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:12,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 12:46:13,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385310744] [2022-11-20 12:46:13,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385310744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846371269] [2022-11-20 12:46:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:13,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:13,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:13,063 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:13,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:46:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:13,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:46:13,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:13,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846371269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:13,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:13,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 12:46:13,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105474260] [2022-11-20 12:46:13,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:13,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:13,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:13,460 INFO L87 Difference]: Start difference. First operand 21638 states and 27512 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 12:46:14,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:14,589 INFO L93 Difference]: Finished difference Result 54470 states and 69457 transitions. [2022-11-20 12:46:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:14,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 201 [2022-11-20 12:46:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:14,652 INFO L225 Difference]: With dead ends: 54470 [2022-11-20 12:46:14,652 INFO L226 Difference]: Without dead ends: 33037 [2022-11-20 12:46:14,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:14,675 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 233 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:14,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 168 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33037 states. [2022-11-20 12:46:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33037 to 30800. [2022-11-20 12:46:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30800 states, 30799 states have (on average 1.2554303711159454) internal successors, (38666), 30799 states have internal predecessors, (38666), 0 states have call successors, (0), 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 12:46:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30800 states to 30800 states and 38666 transitions. [2022-11-20 12:46:15,252 INFO L78 Accepts]: Start accepts. Automaton has 30800 states and 38666 transitions. Word has length 201 [2022-11-20 12:46:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:15,252 INFO L495 AbstractCegarLoop]: Abstraction has 30800 states and 38666 transitions. [2022-11-20 12:46:15,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 12:46:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30800 states and 38666 transitions. [2022-11-20 12:46:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-20 12:46:15,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:15,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:15,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:15,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:15,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2042073651, now seen corresponding path program 1 times [2022-11-20 12:46:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:15,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606391480] [2022-11-20 12:46:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:46:16,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:16,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606391480] [2022-11-20 12:46:16,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606391480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:16,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:16,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:46:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489692208] [2022-11-20 12:46:16,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:16,090 INFO L87 Difference]: Start difference. First operand 30800 states and 38666 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 12:46:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:17,501 INFO L93 Difference]: Finished difference Result 63040 states and 78980 transitions. [2022-11-20 12:46:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 209 [2022-11-20 12:46:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:17,566 INFO L225 Difference]: With dead ends: 63040 [2022-11-20 12:46:17,566 INFO L226 Difference]: Without dead ends: 37533 [2022-11-20 12:46:17,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:17,588 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:17,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 211 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:46:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37533 states. [2022-11-20 12:46:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37533 to 37519. [2022-11-20 12:46:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 37518 states have (on average 1.242310357694973) internal successors, (46609), 37518 states have internal predecessors, (46609), 0 states have call successors, (0), 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 12:46:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 46609 transitions. [2022-11-20 12:46:18,425 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 46609 transitions. Word has length 209 [2022-11-20 12:46:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:18,425 INFO L495 AbstractCegarLoop]: Abstraction has 37519 states and 46609 transitions. [2022-11-20 12:46:18,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 12:46:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 46609 transitions. [2022-11-20 12:46:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-20 12:46:18,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:18,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:18,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:46:18,467 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1793571458, now seen corresponding path program 1 times [2022-11-20 12:46:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:18,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57073469] [2022-11-20 12:46:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:18,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:46:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57073469] [2022-11-20 12:46:19,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57073469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889749514] [2022-11-20 12:46:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:19,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:19,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:19,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:46:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:19,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:46:19,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889749514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:19,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:19,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 12:46:19,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626702395] [2022-11-20 12:46:19,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:19,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:19,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:19,455 INFO L87 Difference]: Start difference. First operand 37519 states and 46609 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 12:46:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:20,940 INFO L93 Difference]: Finished difference Result 87421 states and 110634 transitions. [2022-11-20 12:46:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 216 [2022-11-20 12:46:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:21,026 INFO L225 Difference]: With dead ends: 87421 [2022-11-20 12:46:21,026 INFO L226 Difference]: Without dead ends: 50717 [2022-11-20 12:46:21,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:21,064 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 228 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:21,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 167 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:46:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50717 states. [2022-11-20 12:46:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50717 to 50714. [2022-11-20 12:46:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50714 states, 50713 states have (on average 1.2063376254609273) internal successors, (61177), 50713 states have internal predecessors, (61177), 0 states have call successors, (0), 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 12:46:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50714 states to 50714 states and 61177 transitions. [2022-11-20 12:46:22,111 INFO L78 Accepts]: Start accepts. Automaton has 50714 states and 61177 transitions. Word has length 216 [2022-11-20 12:46:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:22,111 INFO L495 AbstractCegarLoop]: Abstraction has 50714 states and 61177 transitions. [2022-11-20 12:46:22,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 12:46:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 50714 states and 61177 transitions. [2022-11-20 12:46:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-20 12:46:22,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:22,144 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:22,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:22,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:46:22,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1943599198, now seen corresponding path program 1 times [2022-11-20 12:46:22,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950557376] [2022-11-20 12:46:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-20 12:46:22,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950557376] [2022-11-20 12:46:22,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950557376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:22,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:22,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:22,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282086294] [2022-11-20 12:46:22,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:22,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:22,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:22,911 INFO L87 Difference]: Start difference. First operand 50714 states and 61177 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 12:46:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:24,384 INFO L93 Difference]: Finished difference Result 100829 states and 121850 transitions. [2022-11-20 12:46:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:24,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 220 [2022-11-20 12:46:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:24,465 INFO L225 Difference]: With dead ends: 100829 [2022-11-20 12:46:24,466 INFO L226 Difference]: Without dead ends: 51744 [2022-11-20 12:46:24,501 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 12:46:24,503 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:24,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 402 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:46:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51744 states. [2022-11-20 12:46:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51744 to 44000. [2022-11-20 12:46:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44000 states, 43999 states have (on average 1.2025727857451305) internal successors, (52912), 43999 states have internal predecessors, (52912), 0 states have call successors, (0), 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 12:46:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44000 states to 44000 states and 52912 transitions. [2022-11-20 12:46:25,215 INFO L78 Accepts]: Start accepts. Automaton has 44000 states and 52912 transitions. Word has length 220 [2022-11-20 12:46:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:25,215 INFO L495 AbstractCegarLoop]: Abstraction has 44000 states and 52912 transitions. [2022-11-20 12:46:25,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 12:46:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 44000 states and 52912 transitions. [2022-11-20 12:46:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-20 12:46:25,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:25,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:46:25,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash -796111962, now seen corresponding path program 1 times [2022-11-20 12:46:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889052756] [2022-11-20 12:46:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:46:25,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889052756] [2022-11-20 12:46:25,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889052756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419016916] [2022-11-20 12:46:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:25,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:25,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:26,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:46:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:46:26,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:26,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419016916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:26,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:26,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 12:46:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753124761] [2022-11-20 12:46:26,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:26,246 INFO L87 Difference]: Start difference. First operand 44000 states and 52912 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 12:46:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:27,375 INFO L93 Difference]: Finished difference Result 86983 states and 104683 transitions. [2022-11-20 12:46:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 236 [2022-11-20 12:46:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:27,431 INFO L225 Difference]: With dead ends: 86983 [2022-11-20 12:46:27,431 INFO L226 Difference]: Without dead ends: 43798 [2022-11-20 12:46:27,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:27,461 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 260 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:27,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 97 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43798 states. [2022-11-20 12:46:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43798 to 43795. [2022-11-20 12:46:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43795 states, 43794 states have (on average 1.1898433575375622) internal successors, (52108), 43794 states have internal predecessors, (52108), 0 states have call successors, (0), 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 12:46:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43795 states to 43795 states and 52108 transitions. [2022-11-20 12:46:28,211 INFO L78 Accepts]: Start accepts. Automaton has 43795 states and 52108 transitions. Word has length 236 [2022-11-20 12:46:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:28,212 INFO L495 AbstractCegarLoop]: Abstraction has 43795 states and 52108 transitions. [2022-11-20 12:46:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 12:46:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 43795 states and 52108 transitions. [2022-11-20 12:46:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-20 12:46:28,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:28,248 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:28,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:46:28,454 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1917214457, now seen corresponding path program 1 times [2022-11-20 12:46:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:28,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890849231] [2022-11-20 12:46:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:28,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 12:46:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890849231] [2022-11-20 12:46:29,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890849231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715607192] [2022-11-20 12:46:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:46:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:46:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:46:29,112 INFO L87 Difference]: Start difference. First operand 43795 states and 52108 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 12:46:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:30,680 INFO L93 Difference]: Finished difference Result 86809 states and 103376 transitions. [2022-11-20 12:46:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:46:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 236 [2022-11-20 12:46:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:30,717 INFO L225 Difference]: With dead ends: 86809 [2022-11-20 12:46:30,718 INFO L226 Difference]: Without dead ends: 43829 [2022-11-20 12:46:30,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:46:30,740 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 447 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:30,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 158 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:46:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43829 states. [2022-11-20 12:46:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43829 to 42372. [2022-11-20 12:46:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42372 states, 42371 states have (on average 1.1922305350357556) internal successors, (50516), 42371 states have internal predecessors, (50516), 0 states have call successors, (0), 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 12:46:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42372 states to 42372 states and 50516 transitions. [2022-11-20 12:46:31,291 INFO L78 Accepts]: Start accepts. Automaton has 42372 states and 50516 transitions. Word has length 236 [2022-11-20 12:46:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:31,292 INFO L495 AbstractCegarLoop]: Abstraction has 42372 states and 50516 transitions. [2022-11-20 12:46:31,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 12:46:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42372 states and 50516 transitions. [2022-11-20 12:46:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-20 12:46:31,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:31,317 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:31,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:46:31,317 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:31,318 INFO L85 PathProgramCache]: Analyzing trace with hash -197015260, now seen corresponding path program 1 times [2022-11-20 12:46:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670198951] [2022-11-20 12:46:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:31,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-20 12:46:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:31,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670198951] [2022-11-20 12:46:31,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670198951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:31,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400525876] [2022-11-20 12:46:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:31,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:31,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:31,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:46:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 12:46:32,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:32,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400525876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:32,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:32,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 12:46:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317965942] [2022-11-20 12:46:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:32,080 INFO L87 Difference]: Start difference. First operand 42372 states and 50516 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 12:46:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:33,181 INFO L93 Difference]: Finished difference Result 82334 states and 97982 transitions. [2022-11-20 12:46:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 243 [2022-11-20 12:46:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:33,217 INFO L225 Difference]: With dead ends: 82334 [2022-11-20 12:46:33,217 INFO L226 Difference]: Without dead ends: 40370 [2022-11-20 12:46:33,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:33,233 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:33,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 389 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40370 states. [2022-11-20 12:46:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40370 to 40342. [2022-11-20 12:46:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40342 states, 40341 states have (on average 1.1754294638209266) internal successors, (47418), 40341 states have internal predecessors, (47418), 0 states have call successors, (0), 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 12:46:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40342 states to 40342 states and 47418 transitions. [2022-11-20 12:46:33,918 INFO L78 Accepts]: Start accepts. Automaton has 40342 states and 47418 transitions. Word has length 243 [2022-11-20 12:46:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:33,918 INFO L495 AbstractCegarLoop]: Abstraction has 40342 states and 47418 transitions. [2022-11-20 12:46:33,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 12:46:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40342 states and 47418 transitions. [2022-11-20 12:46:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-20 12:46:33,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:33,940 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:33,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 12:46:34,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:46:34,141 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash 313907243, now seen corresponding path program 1 times [2022-11-20 12:46:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:34,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389153500] [2022-11-20 12:46:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:46:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389153500] [2022-11-20 12:46:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389153500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:34,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:34,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835972968] [2022-11-20 12:46:34,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:34,397 INFO L87 Difference]: Start difference. First operand 40342 states and 47418 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 12:46:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:35,519 INFO L93 Difference]: Finished difference Result 72533 states and 85287 transitions. [2022-11-20 12:46:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 254 [2022-11-20 12:46:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:35,547 INFO L225 Difference]: With dead ends: 72533 [2022-11-20 12:46:35,547 INFO L226 Difference]: Without dead ends: 32803 [2022-11-20 12:46:35,560 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 12:46:35,561 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 279 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:35,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 369 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:46:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32803 states. [2022-11-20 12:46:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32803 to 32599. [2022-11-20 12:46:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32599 states, 32598 states have (on average 1.14623596539665) internal successors, (37365), 32598 states have internal predecessors, (37365), 0 states have call successors, (0), 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 12:46:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32599 states to 32599 states and 37365 transitions. [2022-11-20 12:46:35,857 INFO L78 Accepts]: Start accepts. Automaton has 32599 states and 37365 transitions. Word has length 254 [2022-11-20 12:46:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:35,857 INFO L495 AbstractCegarLoop]: Abstraction has 32599 states and 37365 transitions. [2022-11-20 12:46:35,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 12:46:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 32599 states and 37365 transitions. [2022-11-20 12:46:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-20 12:46:35,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:35,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:35,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:46:35,872 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1752125597, now seen corresponding path program 1 times [2022-11-20 12:46:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:35,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656405555] [2022-11-20 12:46:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:36,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656405555] [2022-11-20 12:46:36,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656405555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:36,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:36,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177775539] [2022-11-20 12:46:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:36,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:36,119 INFO L87 Difference]: Start difference. First operand 32599 states and 37365 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 12:46:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:37,044 INFO L93 Difference]: Finished difference Result 63964 states and 73189 transitions. [2022-11-20 12:46:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 268 [2022-11-20 12:46:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:37,071 INFO L225 Difference]: With dead ends: 63964 [2022-11-20 12:46:37,072 INFO L226 Difference]: Without dead ends: 31977 [2022-11-20 12:46:37,087 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 12:46:37,088 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 255 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:37,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 368 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:46:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31977 states. [2022-11-20 12:46:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31977 to 27914. [2022-11-20 12:46:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27914 states, 27913 states have (on average 1.1229534625443343) internal successors, (31345), 27913 states have internal predecessors, (31345), 0 states have call successors, (0), 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 12:46:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27914 states to 27914 states and 31345 transitions. [2022-11-20 12:46:37,523 INFO L78 Accepts]: Start accepts. Automaton has 27914 states and 31345 transitions. Word has length 268 [2022-11-20 12:46:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:37,523 INFO L495 AbstractCegarLoop]: Abstraction has 27914 states and 31345 transitions. [2022-11-20 12:46:37,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 12:46:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27914 states and 31345 transitions. [2022-11-20 12:46:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-20 12:46:37,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:37,544 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:37,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:46:37,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 883764827, now seen corresponding path program 1 times [2022-11-20 12:46:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109069819] [2022-11-20 12:46:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-20 12:46:37,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109069819] [2022-11-20 12:46:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109069819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623652562] [2022-11-20 12:46:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:37,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:37,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:46:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:46:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-20 12:46:38,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:38,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623652562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:38,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:38,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 12:46:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937379853] [2022-11-20 12:46:38,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:38,250 INFO L87 Difference]: Start difference. First operand 27914 states and 31345 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 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 12:46:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:39,015 INFO L93 Difference]: Finished difference Result 50496 states and 56589 transitions. [2022-11-20 12:46:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 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) Word has length 277 [2022-11-20 12:46:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:39,032 INFO L225 Difference]: With dead ends: 50496 [2022-11-20 12:46:39,033 INFO L226 Difference]: Without dead ends: 23804 [2022-11-20 12:46:39,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:39,040 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:39,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:46:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23804 states. [2022-11-20 12:46:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23804 to 22180. [2022-11-20 12:46:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22180 states, 22179 states have (on average 1.111501871139366) internal successors, (24652), 22179 states have internal predecessors, (24652), 0 states have call successors, (0), 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 12:46:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22180 states to 22180 states and 24652 transitions. [2022-11-20 12:46:39,253 INFO L78 Accepts]: Start accepts. Automaton has 22180 states and 24652 transitions. Word has length 277 [2022-11-20 12:46:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:39,253 INFO L495 AbstractCegarLoop]: Abstraction has 22180 states and 24652 transitions. [2022-11-20 12:46:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 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 12:46:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 22180 states and 24652 transitions. [2022-11-20 12:46:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 12:46:39,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:39,267 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:39,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:39,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:39,475 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2123865183, now seen corresponding path program 1 times [2022-11-20 12:46:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:39,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301004226] [2022-11-20 12:46:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 12:46:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:39,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301004226] [2022-11-20 12:46:39,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301004226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:39,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:39,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8486471] [2022-11-20 12:46:39,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:39,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:39,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:39,626 INFO L87 Difference]: Start difference. First operand 22180 states and 24652 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 12:46:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:40,138 INFO L93 Difference]: Finished difference Result 57779 states and 64364 transitions. [2022-11-20 12:46:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 286 [2022-11-20 12:46:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:40,174 INFO L225 Difference]: With dead ends: 57779 [2022-11-20 12:46:40,174 INFO L226 Difference]: Without dead ends: 36618 [2022-11-20 12:46:40,183 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 12:46:40,183 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 298 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:40,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 865 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:46:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2022-11-20 12:46:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 36006. [2022-11-20 12:46:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36006 states, 36005 states have (on average 1.104124427162894) internal successors, (39754), 36005 states have internal predecessors, (39754), 0 states have call successors, (0), 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 12:46:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36006 states to 36006 states and 39754 transitions. [2022-11-20 12:46:40,748 INFO L78 Accepts]: Start accepts. Automaton has 36006 states and 39754 transitions. Word has length 286 [2022-11-20 12:46:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:40,748 INFO L495 AbstractCegarLoop]: Abstraction has 36006 states and 39754 transitions. [2022-11-20 12:46:40,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 12:46:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 36006 states and 39754 transitions. [2022-11-20 12:46:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-20 12:46:40,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:40,770 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:40,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:46:40,770 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:40,771 INFO L85 PathProgramCache]: Analyzing trace with hash -71889045, now seen corresponding path program 1 times [2022-11-20 12:46:40,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:40,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751740415] [2022-11-20 12:46:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:40,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 151 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:46:41,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751740415] [2022-11-20 12:46:41,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751740415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275425152] [2022-11-20 12:46:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:41,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:41,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:41,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:46:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 12:46:41,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:41,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275425152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:41,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:41,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 12:46:41,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803095257] [2022-11-20 12:46:41,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:41,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:41,974 INFO L87 Difference]: Start difference. First operand 36006 states and 39754 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 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 12:46:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:42,485 INFO L93 Difference]: Finished difference Result 96010 states and 106026 transitions. [2022-11-20 12:46:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:42,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 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 295 [2022-11-20 12:46:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:42,538 INFO L225 Difference]: With dead ends: 96010 [2022-11-20 12:46:42,539 INFO L226 Difference]: Without dead ends: 61023 [2022-11-20 12:46:42,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:42,709 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 238 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:42,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 527 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:46:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61023 states. [2022-11-20 12:46:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61023 to 61021. [2022-11-20 12:46:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61021 states, 61020 states have (on average 1.1038184201901016) internal successors, (67355), 61020 states have internal predecessors, (67355), 0 states have call successors, (0), 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 12:46:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61021 states to 61021 states and 67355 transitions. [2022-11-20 12:46:43,473 INFO L78 Accepts]: Start accepts. Automaton has 61021 states and 67355 transitions. Word has length 295 [2022-11-20 12:46:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:43,474 INFO L495 AbstractCegarLoop]: Abstraction has 61021 states and 67355 transitions. [2022-11-20 12:46:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 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 12:46:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 61021 states and 67355 transitions. [2022-11-20 12:46:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-11-20 12:46:43,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:43,490 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:43,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:43,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:43,691 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1113073813, now seen corresponding path program 1 times [2022-11-20 12:46:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957570688] [2022-11-20 12:46:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 130 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:45,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957570688] [2022-11-20 12:46:45,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957570688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:45,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449480154] [2022-11-20 12:46:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:45,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:45,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:45,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:46:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:46:45,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449480154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:45,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:45,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 12:46:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547216269] [2022-11-20 12:46:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:46:45,824 INFO L87 Difference]: Start difference. First operand 61021 states and 67355 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 12:46:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:46,920 INFO L93 Difference]: Finished difference Result 120826 states and 133386 transitions. [2022-11-20 12:46:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 296 [2022-11-20 12:46:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:46,977 INFO L225 Difference]: With dead ends: 120826 [2022-11-20 12:46:46,977 INFO L226 Difference]: Without dead ends: 60824 [2022-11-20 12:46:47,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:46:47,001 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 116 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:47,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 290 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:46:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60824 states. [2022-11-20 12:46:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60824 to 60816. [2022-11-20 12:46:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60816 states, 60815 states have (on average 1.1022445120447257) internal successors, (67033), 60815 states have internal predecessors, (67033), 0 states have call successors, (0), 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 12:46:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60816 states to 60816 states and 67033 transitions. [2022-11-20 12:46:47,737 INFO L78 Accepts]: Start accepts. Automaton has 60816 states and 67033 transitions. Word has length 296 [2022-11-20 12:46:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:47,738 INFO L495 AbstractCegarLoop]: Abstraction has 60816 states and 67033 transitions. [2022-11-20 12:46:47,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 12:46:47,738 INFO L276 IsEmpty]: Start isEmpty. Operand 60816 states and 67033 transitions. [2022-11-20 12:46:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-20 12:46:47,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:47,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:47,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:47,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:46:47,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1194039188, now seen corresponding path program 1 times [2022-11-20 12:46:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65557791] [2022-11-20 12:46:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 12:46:48,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65557791] [2022-11-20 12:46:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65557791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:48,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:48,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375967278] [2022-11-20 12:46:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:48,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:46:48,139 INFO L87 Difference]: Start difference. First operand 60816 states and 67033 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 12:46:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:49,508 INFO L93 Difference]: Finished difference Result 125911 states and 138840 transitions. [2022-11-20 12:46:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 302 [2022-11-20 12:46:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:49,564 INFO L225 Difference]: With dead ends: 125911 [2022-11-20 12:46:49,564 INFO L226 Difference]: Without dead ends: 66114 [2022-11-20 12:46:49,585 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 12:46:49,586 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 194 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:49,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 362 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:46:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66114 states. [2022-11-20 12:46:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66114 to 64277. [2022-11-20 12:46:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64277 states, 64276 states have (on average 1.1014686663762525) internal successors, (70798), 64276 states have internal predecessors, (70798), 0 states have call successors, (0), 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 12:46:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64277 states to 64277 states and 70798 transitions. [2022-11-20 12:46:50,577 INFO L78 Accepts]: Start accepts. Automaton has 64277 states and 70798 transitions. Word has length 302 [2022-11-20 12:46:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:50,578 INFO L495 AbstractCegarLoop]: Abstraction has 64277 states and 70798 transitions. [2022-11-20 12:46:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 12:46:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 64277 states and 70798 transitions. [2022-11-20 12:46:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-11-20 12:46:50,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:50,602 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:46:50,602 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 46447543, now seen corresponding path program 1 times [2022-11-20 12:46:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:50,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691323255] [2022-11-20 12:46:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 231 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 12:46:51,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691323255] [2022-11-20 12:46:51,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691323255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277709856] [2022-11-20 12:46:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:51,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:51,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:51,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:46:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:46:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 12:46:51,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:46:51,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277709856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:51,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:46:51,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 12:46:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153451383] [2022-11-20 12:46:51,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:51,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:46:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:46:51,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:46:51,877 INFO L87 Difference]: Start difference. First operand 64277 states and 70798 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 12:46:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:53,135 INFO L93 Difference]: Finished difference Result 168398 states and 185043 transitions. [2022-11-20 12:46:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:46:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 336 [2022-11-20 12:46:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:53,228 INFO L225 Difference]: With dead ends: 168398 [2022-11-20 12:46:53,228 INFO L226 Difference]: Without dead ends: 105343 [2022-11-20 12:46:53,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:46:53,244 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 223 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:53,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 809 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:46:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105343 states. [2022-11-20 12:46:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105343 to 104933. [2022-11-20 12:46:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104933 states, 104932 states have (on average 1.0881904471467236) internal successors, (114186), 104932 states have internal predecessors, (114186), 0 states have call successors, (0), 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 12:46:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104933 states to 104933 states and 114186 transitions. [2022-11-20 12:46:54,729 INFO L78 Accepts]: Start accepts. Automaton has 104933 states and 114186 transitions. Word has length 336 [2022-11-20 12:46:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:54,730 INFO L495 AbstractCegarLoop]: Abstraction has 104933 states and 114186 transitions. [2022-11-20 12:46:54,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 12:46:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 104933 states and 114186 transitions. [2022-11-20 12:46:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-11-20 12:46:54,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:54,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:54,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:54,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c25990d-42ac-4382-9b2b-2d6030f4d8d6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:54,961 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -175651986, now seen corresponding path program 1 times [2022-11-20 12:46:54,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:54,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326021407] [2022-11-20 12:46:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 12:46:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326021407] [2022-11-20 12:46:55,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326021407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:55,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:55,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:46:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104030320] [2022-11-20 12:46:55,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:55,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:46:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:46:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:46:55,804 INFO L87 Difference]: Start difference. First operand 104933 states and 114186 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 12:46:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:57,916 INFO L93 Difference]: Finished difference Result 218223 states and 237227 transitions. [2022-11-20 12:46:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:46:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 340 [2022-11-20 12:46:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:58,043 INFO L225 Difference]: With dead ends: 218223 [2022-11-20 12:46:58,043 INFO L226 Difference]: Without dead ends: 114510 [2022-11-20 12:46:58,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:46:58,084 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 314 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:58,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 91 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:46:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114510 states. [2022-11-20 12:46:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114510 to 107580. [2022-11-20 12:46:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107580 states, 107579 states have (on average 1.0853140482807984) internal successors, (116757), 107579 states have internal predecessors, (116757), 0 states have call successors, (0), 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 12:47:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107580 states to 107580 states and 116757 transitions. [2022-11-20 12:47:00,212 INFO L78 Accepts]: Start accepts. Automaton has 107580 states and 116757 transitions. Word has length 340 [2022-11-20 12:47:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:47:00,212 INFO L495 AbstractCegarLoop]: Abstraction has 107580 states and 116757 transitions. [2022-11-20 12:47:00,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 12:47:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 107580 states and 116757 transitions. [2022-11-20 12:47:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-20 12:47:00,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:47:00,250 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:47:00,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 12:47:00,251 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:47:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:47:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash -82687174, now seen corresponding path program 1 times [2022-11-20 12:47:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:47:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95054233] [2022-11-20 12:47:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:47:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:47:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 12:47:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:47:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95054233] [2022-11-20 12:47:00,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95054233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:47:00,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:47:00,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:47:00,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140996649] [2022-11-20 12:47:00,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:47:00,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:47:00,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:47:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:47:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:47:00,551 INFO L87 Difference]: Start difference. First operand 107580 states and 116757 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 12:47:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:47:02,625 INFO L93 Difference]: Finished difference Result 219054 states and 237708 transitions. [2022-11-20 12:47:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:47:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 346 [2022-11-20 12:47:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:47:02,724 INFO L225 Difference]: With dead ends: 219054 [2022-11-20 12:47:02,724 INFO L226 Difference]: Without dead ends: 112493 [2022-11-20 12:47:02,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:47:02,757 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 354 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:47:02,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 99 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:47:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112493 states. [2022-11-20 12:47:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112493 to 107385. [2022-11-20 12:47:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107385 states, 107384 states have (on average 1.0862977724800715) internal successors, (116651), 107384 states have internal predecessors, (116651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)