./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:21:51,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:21:51,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:21:51,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:21:51,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:21:51,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:21:51,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:21:51,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:21:51,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:21:51,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:21:51,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:21:51,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:21:51,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:21:51,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:21:51,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:21:51,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:21:51,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:21:51,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:21:51,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:21:51,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:21:51,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:21:51,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:21:51,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:21:51,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:21:51,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:21:51,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:21:51,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:21:51,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:21:51,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:21:51,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:21:51,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:21:51,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:21:51,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:21:51,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:21:51,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:21:51,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:21:51,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:21:51,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:21:51,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:21:51,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:21:51,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:21:51,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:21:51,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:21:51,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:21:51,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:21:51,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:21:51,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:21:51,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:21:51,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:21:51,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:21:51,426 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:21:51,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:21:51,426 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:21:51,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:21:51,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:21:51,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:21:51,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:21:51,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:21:51,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:21:51,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:21:51,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:21:51,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:21:51,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:21:51,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:21:51,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:21:51,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:21:51,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:21:51,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:21:51,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:21:51,436 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_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 [2021-12-06 23:21:51,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:21:51,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:21:51,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:21:51,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:21:51,626 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:21:51,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2021-12-06 23:21:51,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/data/b2c61bf4b/2527943013734aee946e35f5fd9a1433/FLAGcd9df4d0e [2021-12-06 23:21:52,211 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:21:52,211 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2021-12-06 23:21:52,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/data/b2c61bf4b/2527943013734aee946e35f5fd9a1433/FLAGcd9df4d0e [2021-12-06 23:21:52,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/data/b2c61bf4b/2527943013734aee946e35f5fd9a1433 [2021-12-06 23:21:52,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:21:52,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:21:52,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:21:52,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:21:52,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:21:52,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:21:52" (1/1) ... [2021-12-06 23:21:52,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550b116a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:52, skipping insertion in model container [2021-12-06 23:21:52,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:21:52" (1/1) ... [2021-12-06 23:21:52,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:21:52,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:21:52,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2021-12-06 23:21:53,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:21:53,379 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:21:53,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2021-12-06 23:21:53,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:21:53,630 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:21:53,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53 WrapperNode [2021-12-06 23:21:53,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:21:53,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:21:53,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:21:53,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:21:53,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:53,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:53,845 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-06 23:21:53,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:21:53,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:21:53,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:21:53,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:21:53,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:53,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:53,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:53,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:53,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:54,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:54,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:54,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:21:54,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:21:54,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:21:54,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:21:54,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (1/1) ... [2021-12-06 23:21:54,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:21:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:54,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:21:54,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:21:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:21:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:21:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:21:54,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:21:54,216 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:21:54,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:21:56,534 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:21:56,550 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:21:56,550 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:21:56,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:21:56 BoogieIcfgContainer [2021-12-06 23:21:56,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:21:56,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:21:56,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:21:56,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:21:56,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:21:52" (1/3) ... [2021-12-06 23:21:56,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc5ff94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:21:56, skipping insertion in model container [2021-12-06 23:21:56,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:21:53" (2/3) ... [2021-12-06 23:21:56,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc5ff94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:21:56, skipping insertion in model container [2021-12-06 23:21:56,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:21:56" (3/3) ... [2021-12-06 23:21:56,562 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2021-12-06 23:21:56,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:21:56,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:21:56,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:21:56,611 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:21:56,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:21:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 23:21:56,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:56,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:21:56,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2021-12-06 23:21:56,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:56,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980420653] [2021-12-06 23:21:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:56,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:21:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:21:56,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980420653] [2021-12-06 23:21:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980420653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:21:56,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:21:56,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:21:56,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368340490] [2021-12-06 23:21:56,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:21:56,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:21:56,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:21:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:21:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:21:56,871 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:59,046 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-06 23:21:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:21:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-12-06 23:21:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:59,063 INFO L225 Difference]: With dead ends: 1644 [2021-12-06 23:21:59,063 INFO L226 Difference]: Without dead ends: 977 [2021-12-06 23:21:59,067 INFO L932 BasicCegarLoop]: 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 [2021-12-06 23:21:59,069 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 439 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:59,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 23:21:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-06 23:21:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-06 23:21:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-06 23:21:59,132 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 49 [2021-12-06 23:21:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:59,133 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-06 23:21:59,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-06 23:21:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 23:21:59,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:59,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:21:59,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:21:59,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash -172834846, now seen corresponding path program 1 times [2021-12-06 23:21:59,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:59,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691957192] [2021-12-06 23:21:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:59,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:21:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:21:59,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691957192] [2021-12-06 23:21:59,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691957192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:21:59,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:21:59,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:21:59,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680150764] [2021-12-06 23:21:59,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:21:59,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:21:59,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:21:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:21:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:21:59,243 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:01,217 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-12-06 23:22:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-06 23:22:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:01,226 INFO L225 Difference]: With dead ends: 2813 [2021-12-06 23:22:01,226 INFO L226 Difference]: Without dead ends: 1844 [2021-12-06 23:22:01,227 INFO L932 BasicCegarLoop]: 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 [2021-12-06 23:22:01,228 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:01,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 23:22:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-06 23:22:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-12-06 23:22:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-12-06 23:22:01,285 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 116 [2021-12-06 23:22:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:01,286 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-12-06 23:22:01,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-12-06 23:22:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 23:22:01,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:01,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:01,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:22:01,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -807304596, now seen corresponding path program 1 times [2021-12-06 23:22:01,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:01,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799630400] [2021-12-06 23:22:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:01,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:01,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799630400] [2021-12-06 23:22:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799630400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:01,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:01,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:01,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787344349] [2021-12-06 23:22:01,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:01,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:01,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:01,382 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:03,313 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-12-06 23:22:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:03,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-06 23:22:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:03,324 INFO L225 Difference]: With dead ends: 4552 [2021-12-06 23:22:03,325 INFO L226 Difference]: Without dead ends: 2713 [2021-12-06 23:22:03,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:03,327 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:03,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 23:22:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-06 23:22:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-06 23:22:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-12-06 23:22:03,368 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 119 [2021-12-06 23:22:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:03,368 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-12-06 23:22:03,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-12-06 23:22:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 23:22:03,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:03,372 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:22:03,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 182092692, now seen corresponding path program 1 times [2021-12-06 23:22:03,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:03,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659375525] [2021-12-06 23:22:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:03,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 23:22:03,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659375525] [2021-12-06 23:22:03,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659375525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:03,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:03,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:22:03,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693375667] [2021-12-06 23:22:03,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:03,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:03,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:03,467 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:05,078 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-12-06 23:22:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 188 [2021-12-06 23:22:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:05,094 INFO L225 Difference]: With dead ends: 7984 [2021-12-06 23:22:05,094 INFO L226 Difference]: Without dead ends: 4421 [2021-12-06 23:22:05,097 INFO L932 BasicCegarLoop]: 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 [2021-12-06 23:22:05,098 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:05,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:22:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-12-06 23:22:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-12-06 23:22:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-12-06 23:22:05,156 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 188 [2021-12-06 23:22:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:05,157 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-12-06 23:22:05,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-12-06 23:22:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 23:22:05,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:05,159 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:05,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:22:05,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1924874294, now seen corresponding path program 1 times [2021-12-06 23:22:05,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:05,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800730655] [2021-12-06 23:22:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:05,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:05,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800730655] [2021-12-06 23:22:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800730655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:05,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:05,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994980334] [2021-12-06 23:22:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:05,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:05,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:05,258 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:06,791 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-12-06 23:22:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-06 23:22:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:06,819 INFO L225 Difference]: With dead ends: 9273 [2021-12-06 23:22:06,819 INFO L226 Difference]: Without dead ends: 5704 [2021-12-06 23:22:06,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:06,822 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:06,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:22:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-12-06 23:22:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-12-06 23:22:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-12-06 23:22:06,894 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 201 [2021-12-06 23:22:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:06,895 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-12-06 23:22:06,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-12-06 23:22:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 23:22:06,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:06,897 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:06,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:22:06,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1110667493, now seen corresponding path program 1 times [2021-12-06 23:22:06,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:06,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873816471] [2021-12-06 23:22:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:06,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 23:22:06,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873816471] [2021-12-06 23:22:06,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873816471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:06,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:06,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:06,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274639771] [2021-12-06 23:22:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:06,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:06,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:06,977 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:08,809 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-12-06 23:22:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:08,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 203 [2021-12-06 23:22:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:08,838 INFO L225 Difference]: With dead ends: 14376 [2021-12-06 23:22:08,838 INFO L226 Difference]: Without dead ends: 8673 [2021-12-06 23:22:08,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:08,842 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 402 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:08,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 23:22:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-12-06 23:22:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-12-06 23:22:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-12-06 23:22:08,918 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 203 [2021-12-06 23:22:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:08,919 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-12-06 23:22:08,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-12-06 23:22:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-06 23:22:08,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:08,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:22:08,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash -145584583, now seen corresponding path program 1 times [2021-12-06 23:22:08,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:08,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903387787] [2021-12-06 23:22:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:08,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:22:09,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:09,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903387787] [2021-12-06 23:22:09,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903387787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:09,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:09,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:09,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948169360] [2021-12-06 23:22:09,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:09,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:09,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:09,050 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:10,780 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2021-12-06 23:22:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-12-06 23:22:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:10,802 INFO L225 Difference]: With dead ends: 13935 [2021-12-06 23:22:10,802 INFO L226 Difference]: Without dead ends: 7832 [2021-12-06 23:22:10,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:10,806 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:10,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 23:22:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2021-12-06 23:22:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2021-12-06 23:22:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2021-12-06 23:22:10,884 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 281 [2021-12-06 23:22:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:10,884 INFO L470 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2021-12-06 23:22:10,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2021-12-06 23:22:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-12-06 23:22:10,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:10,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:10,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:22:10,888 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576314, now seen corresponding path program 1 times [2021-12-06 23:22:10,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:10,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718224992] [2021-12-06 23:22:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:10,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:22:10,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718224992] [2021-12-06 23:22:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718224992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:10,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:10,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:10,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795646563] [2021-12-06 23:22:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:10,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:10,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:10,963 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:12,579 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2021-12-06 23:22:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:12,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 [2021-12-06 23:22:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:12,593 INFO L225 Difference]: With dead ends: 19038 [2021-12-06 23:22:12,593 INFO L226 Difference]: Without dead ends: 11213 [2021-12-06 23:22:12,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:12,598 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:12,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:22:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2021-12-06 23:22:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2021-12-06 23:22:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2021-12-06 23:22:12,690 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 286 [2021-12-06 23:22:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:12,691 INFO L470 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2021-12-06 23:22:12,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2021-12-06 23:22:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-06 23:22:12,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:12,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:22:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:22:12,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash -968764252, now seen corresponding path program 1 times [2021-12-06 23:22:12,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:12,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630772723] [2021-12-06 23:22:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:12,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 23:22:12,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630772723] [2021-12-06 23:22:12,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630772723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:12,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:12,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:12,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993906771] [2021-12-06 23:22:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:12,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:12,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:12,790 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:14,407 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2021-12-06 23:22:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 304 [2021-12-06 23:22:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:14,423 INFO L225 Difference]: With dead ends: 24567 [2021-12-06 23:22:14,423 INFO L226 Difference]: Without dead ends: 13774 [2021-12-06 23:22:14,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:14,431 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:14,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:22:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2021-12-06 23:22:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2021-12-06 23:22:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2021-12-06 23:22:14,573 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 304 [2021-12-06 23:22:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2021-12-06 23:22:14,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2021-12-06 23:22:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-06 23:22:14,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:14,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:22:14,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:22:14,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1120603921, now seen corresponding path program 1 times [2021-12-06 23:22:14,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578697531] [2021-12-06 23:22:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:14,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 293 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:14,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578697531] [2021-12-06 23:22:14,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578697531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259756196] [2021-12-06 23:22:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:14,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:14,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:14,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:22:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:14,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:22:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 23:22:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 23:22:16,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259756196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:16,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:16,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-06 23:22:16,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278836583] [2021-12-06 23:22:16,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:16,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:22:16,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:22:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:22:16,306 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:28,692 INFO L93 Difference]: Finished difference Result 76151 states and 85884 transitions. [2021-12-06 23:22:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:22:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 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 309 [2021-12-06 23:22:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:28,762 INFO L225 Difference]: With dead ends: 76151 [2021-12-06 23:22:28,762 INFO L226 Difference]: Without dead ends: 58978 [2021-12-06 23:22:28,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:22:28,778 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 10535 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 11660 mSolverCounterSat, 2914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10535 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 14574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2914 IncrementalHoareTripleChecker+Valid, 11660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:28,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10535 Valid, 585 Invalid, 14574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2914 Valid, 11660 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2021-12-06 23:22:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58978 states. [2021-12-06 23:22:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58978 to 51241. [2021-12-06 23:22:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51241 states, 51240 states have (on average 1.1169594067135051) internal successors, (57233), 51240 states have internal predecessors, (57233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51241 states to 51241 states and 57233 transitions. [2021-12-06 23:22:29,387 INFO L78 Accepts]: Start accepts. Automaton has 51241 states and 57233 transitions. Word has length 309 [2021-12-06 23:22:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:29,387 INFO L470 AbstractCegarLoop]: Abstraction has 51241 states and 57233 transitions. [2021-12-06 23:22:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 51241 states and 57233 transitions. [2021-12-06 23:22:29,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-12-06 23:22:29,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:29,393 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:22:29,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:22:29,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:29,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:29,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2001050583, now seen corresponding path program 1 times [2021-12-06 23:22:29,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:29,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569303409] [2021-12-06 23:22:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:29,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 520 proven. 80 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 23:22:29,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:29,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569303409] [2021-12-06 23:22:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569303409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:29,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771292108] [2021-12-06 23:22:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:29,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:29,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:29,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:29,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:22:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:22:30,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 23:22:30,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:22:30,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771292108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:30,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:22:30,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 23:22:30,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748128947] [2021-12-06 23:22:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:22:30,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:22:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:22:30,571 INFO L87 Difference]: Start difference. First operand 51241 states and 57233 transitions. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:32,949 INFO L93 Difference]: Finished difference Result 102055 states and 114024 transitions. [2021-12-06 23:22:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:22:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 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 391 [2021-12-06 23:22:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:32,998 INFO L225 Difference]: With dead ends: 102055 [2021-12-06 23:22:32,998 INFO L226 Difference]: Without dead ends: 51666 [2021-12-06 23:22:33,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:22:33,022 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 804 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:33,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 374 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 23:22:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51666 states. [2021-12-06 23:22:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51666 to 51241. [2021-12-06 23:22:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51241 states, 51240 states have (on average 1.1161007025761125) internal successors, (57189), 51240 states have internal predecessors, (57189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51241 states to 51241 states and 57189 transitions. [2021-12-06 23:22:33,528 INFO L78 Accepts]: Start accepts. Automaton has 51241 states and 57189 transitions. Word has length 391 [2021-12-06 23:22:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:33,529 INFO L470 AbstractCegarLoop]: Abstraction has 51241 states and 57189 transitions. [2021-12-06 23:22:33,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 51241 states and 57189 transitions. [2021-12-06 23:22:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-12-06 23:22:33,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:33,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:22:33,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:22:33,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 23:22:33,737 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1628384429, now seen corresponding path program 1 times [2021-12-06 23:22:33,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:33,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818507334] [2021-12-06 23:22:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:33,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 23:22:33,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:33,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818507334] [2021-12-06 23:22:33,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818507334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:33,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:33,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:33,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270549815] [2021-12-06 23:22:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:33,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:33,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:33,913 INFO L87 Difference]: Start difference. First operand 51241 states and 57189 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:35,879 INFO L93 Difference]: Finished difference Result 116973 states and 131327 transitions. [2021-12-06 23:22:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 412 [2021-12-06 23:22:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:35,938 INFO L225 Difference]: With dead ends: 116973 [2021-12-06 23:22:35,938 INFO L226 Difference]: Without dead ends: 66155 [2021-12-06 23:22:35,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:35,961 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 434 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:35,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 431 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 23:22:36,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66155 states. [2021-12-06 23:22:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66155 to 62301. [2021-12-06 23:22:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62301 states, 62300 states have (on average 1.106099518459069) internal successors, (68910), 62300 states have internal predecessors, (68910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62301 states to 62301 states and 68910 transitions. [2021-12-06 23:22:36,625 INFO L78 Accepts]: Start accepts. Automaton has 62301 states and 68910 transitions. Word has length 412 [2021-12-06 23:22:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:36,626 INFO L470 AbstractCegarLoop]: Abstraction has 62301 states and 68910 transitions. [2021-12-06 23:22:36,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 62301 states and 68910 transitions. [2021-12-06 23:22:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-12-06 23:22:36,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:36,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:22:36,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:22:36,633 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1066513443, now seen corresponding path program 1 times [2021-12-06 23:22:36,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154228107] [2021-12-06 23:22:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:36,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:22:36,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154228107] [2021-12-06 23:22:36,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154228107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:36,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:36,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:22:36,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144406373] [2021-12-06 23:22:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:36,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:22:36,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:22:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:36,757 INFO L87 Difference]: Start difference. First operand 62301 states and 68910 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:38,494 INFO L93 Difference]: Finished difference Result 120766 states and 133584 transitions. [2021-12-06 23:22:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:22:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2021-12-06 23:22:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:38,545 INFO L225 Difference]: With dead ends: 120766 [2021-12-06 23:22:38,545 INFO L226 Difference]: Without dead ends: 59317 [2021-12-06 23:22:38,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:22:38,565 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 453 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:38,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 729 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:22:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59317 states. [2021-12-06 23:22:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59317 to 58889. [2021-12-06 23:22:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58889 states, 58888 states have (on average 1.0794389349273197) internal successors, (63566), 58888 states have internal predecessors, (63566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58889 states to 58889 states and 63566 transitions. [2021-12-06 23:22:39,138 INFO L78 Accepts]: Start accepts. Automaton has 58889 states and 63566 transitions. Word has length 418 [2021-12-06 23:22:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:39,139 INFO L470 AbstractCegarLoop]: Abstraction has 58889 states and 63566 transitions. [2021-12-06 23:22:39,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 58889 states and 63566 transitions. [2021-12-06 23:22:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-12-06 23:22:39,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:39,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:22:39,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:22:39,145 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash 580757973, now seen corresponding path program 1 times [2021-12-06 23:22:39,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437357456] [2021-12-06 23:22:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:39,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 558 proven. 72 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 23:22:39,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:39,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437357456] [2021-12-06 23:22:39,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437357456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:39,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562482837] [2021-12-06 23:22:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:39,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:39,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:39,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:39,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:22:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:39,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:22:39,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 23:22:39,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:22:39,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562482837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:39,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:22:39,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 23:22:39,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858924095] [2021-12-06 23:22:39,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:39,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:22:39,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:22:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:22:39,882 INFO L87 Difference]: Start difference. First operand 58889 states and 63566 transitions. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:41,941 INFO L93 Difference]: Finished difference Result 120755 states and 130365 transitions. [2021-12-06 23:22:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:22:41,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 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 427 [2021-12-06 23:22:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:42,000 INFO L225 Difference]: With dead ends: 120755 [2021-12-06 23:22:42,000 INFO L226 Difference]: Without dead ends: 62718 [2021-12-06 23:22:42,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:22:42,029 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 816 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:42,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 355 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 23:22:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62718 states. [2021-12-06 23:22:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62718 to 61868. [2021-12-06 23:22:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61868 states, 61867 states have (on average 1.0784101378764124) internal successors, (66718), 61867 states have internal predecessors, (66718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61868 states to 61868 states and 66718 transitions. [2021-12-06 23:22:42,766 INFO L78 Accepts]: Start accepts. Automaton has 61868 states and 66718 transitions. Word has length 427 [2021-12-06 23:22:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:42,767 INFO L470 AbstractCegarLoop]: Abstraction has 61868 states and 66718 transitions. [2021-12-06 23:22:42,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 61868 states and 66718 transitions. [2021-12-06 23:22:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-12-06 23:22:42,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:42,772 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:42,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:22:42,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:22:42,974 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1992283714, now seen corresponding path program 1 times [2021-12-06 23:22:42,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893321763] [2021-12-06 23:22:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:42,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:43,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:43,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893321763] [2021-12-06 23:22:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893321763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191851100] [2021-12-06 23:22:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:43,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:43,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:43,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:22:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:22:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:44,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:46,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191851100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:46,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:46,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 10 [2021-12-06 23:22:46,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445148517] [2021-12-06 23:22:46,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:46,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:22:46,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:22:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:22:46,735 INFO L87 Difference]: Start difference. First operand 61868 states and 66718 transitions. Second operand has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:58,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:58,685 INFO L93 Difference]: Finished difference Result 228835 states and 246824 transitions. [2021-12-06 23:22:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:22:58,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 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 435 [2021-12-06 23:22:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:58,829 INFO L225 Difference]: With dead ends: 228835 [2021-12-06 23:22:58,830 INFO L226 Difference]: Without dead ends: 167394 [2021-12-06 23:22:58,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:22:58,850 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 4009 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 11577 mSolverCounterSat, 1726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4009 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 13303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1726 IncrementalHoareTripleChecker+Valid, 11577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:58,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4009 Valid, 664 Invalid, 13303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1726 Valid, 11577 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-12-06 23:22:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167394 states. [2021-12-06 23:23:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167394 to 97605. [2021-12-06 23:23:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97605 states, 97604 states have (on average 1.0806626777591082) internal successors, (105477), 97604 states have internal predecessors, (105477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97605 states to 97605 states and 105477 transitions. [2021-12-06 23:23:00,190 INFO L78 Accepts]: Start accepts. Automaton has 97605 states and 105477 transitions. Word has length 435 [2021-12-06 23:23:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:00,191 INFO L470 AbstractCegarLoop]: Abstraction has 97605 states and 105477 transitions. [2021-12-06 23:23:00,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 97605 states and 105477 transitions. [2021-12-06 23:23:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-12-06 23:23:00,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:00,196 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:23:00,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:23:00,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:23:00,399 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1547686500, now seen corresponding path program 1 times [2021-12-06 23:23:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:00,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082658195] [2021-12-06 23:23:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:00,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-12-06 23:23:00,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082658195] [2021-12-06 23:23:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082658195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:00,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:00,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:23:00,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053326239] [2021-12-06 23:23:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:00,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:23:00,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:23:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:00,567 INFO L87 Difference]: Start difference. First operand 97605 states and 105477 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:03,011 INFO L93 Difference]: Finished difference Result 225072 states and 243504 transitions. [2021-12-06 23:23:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:23:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 478 [2021-12-06 23:23:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:03,139 INFO L225 Difference]: With dead ends: 225072 [2021-12-06 23:23:03,139 INFO L226 Difference]: Without dead ends: 127456 [2021-12-06 23:23:03,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:03,169 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 470 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:03,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 180 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 23:23:03,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127456 states. [2021-12-06 23:23:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127456 to 123587. [2021-12-06 23:23:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123587 states, 123586 states have (on average 1.0782774747948798) internal successors, (133260), 123586 states have internal predecessors, (133260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123587 states to 123587 states and 133260 transitions. [2021-12-06 23:23:04,653 INFO L78 Accepts]: Start accepts. Automaton has 123587 states and 133260 transitions. Word has length 478 [2021-12-06 23:23:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:04,653 INFO L470 AbstractCegarLoop]: Abstraction has 123587 states and 133260 transitions. [2021-12-06 23:23:04,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 123587 states and 133260 transitions. [2021-12-06 23:23:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-12-06 23:23:04,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:04,664 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-06 23:23:04,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:23:04,664 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1489171391, now seen corresponding path program 1 times [2021-12-06 23:23:04,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:04,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448288151] [2021-12-06 23:23:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:04,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 749 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-06 23:23:04,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:04,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448288151] [2021-12-06 23:23:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448288151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:04,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:04,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:23:04,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505610540] [2021-12-06 23:23:04,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:23:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:23:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:04,800 INFO L87 Difference]: Start difference. First operand 123587 states and 133260 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:07,124 INFO L93 Difference]: Finished difference Result 273135 states and 294932 transitions. [2021-12-06 23:23:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:23:07,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 545 [2021-12-06 23:23:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:07,270 INFO L225 Difference]: With dead ends: 273135 [2021-12-06 23:23:07,271 INFO L226 Difference]: Without dead ends: 148263 [2021-12-06 23:23:07,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:07,320 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 412 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:07,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 608 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:23:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148263 states. [2021-12-06 23:23:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148263 to 143574. [2021-12-06 23:23:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143574 states, 143573 states have (on average 1.0723464718296616) internal successors, (153960), 143573 states have internal predecessors, (153960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143574 states to 143574 states and 153960 transitions. [2021-12-06 23:23:09,024 INFO L78 Accepts]: Start accepts. Automaton has 143574 states and 153960 transitions. Word has length 545 [2021-12-06 23:23:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:09,024 INFO L470 AbstractCegarLoop]: Abstraction has 143574 states and 153960 transitions. [2021-12-06 23:23:09,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 143574 states and 153960 transitions. [2021-12-06 23:23:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-12-06 23:23:09,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:09,038 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:09,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:23:09,038 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -130283424, now seen corresponding path program 1 times [2021-12-06 23:23:09,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:09,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214792382] [2021-12-06 23:23:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:09,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-06 23:23:09,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214792382] [2021-12-06 23:23:09,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214792382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:09,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:09,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:23:09,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395729090] [2021-12-06 23:23:09,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:09,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:23:09,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:23:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:09,191 INFO L87 Difference]: Start difference. First operand 143574 states and 153960 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:11,599 INFO L93 Difference]: Finished difference Result 307161 states and 329987 transitions. [2021-12-06 23:23:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:23:11,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 552 [2021-12-06 23:23:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:11,900 INFO L225 Difference]: With dead ends: 307161 [2021-12-06 23:23:11,900 INFO L226 Difference]: Without dead ends: 163589 [2021-12-06 23:23:11,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:11,943 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 319 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:11,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 317 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 23:23:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163589 states. [2021-12-06 23:23:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163589 to 147820. [2021-12-06 23:23:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147820 states, 147819 states have (on average 1.0683538652000082) internal successors, (157923), 147819 states have internal predecessors, (157923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147820 states to 147820 states and 157923 transitions. [2021-12-06 23:23:13,516 INFO L78 Accepts]: Start accepts. Automaton has 147820 states and 157923 transitions. Word has length 552 [2021-12-06 23:23:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:13,516 INFO L470 AbstractCegarLoop]: Abstraction has 147820 states and 157923 transitions. [2021-12-06 23:23:13,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 147820 states and 157923 transitions. [2021-12-06 23:23:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-12-06 23:23:13,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:13,525 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2021-12-06 23:23:13,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:23:13,525 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1807872617, now seen corresponding path program 1 times [2021-12-06 23:23:13,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:13,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610421509] [2021-12-06 23:23:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:13,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 1056 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-06 23:23:13,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610421509] [2021-12-06 23:23:13,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610421509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:13,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:13,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:23:13,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141287137] [2021-12-06 23:23:13,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:13,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:23:13,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:23:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:13,655 INFO L87 Difference]: Start difference. First operand 147820 states and 157923 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:15,795 INFO L93 Difference]: Finished difference Result 314355 states and 335832 transitions. [2021-12-06 23:23:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:23:15,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 579 [2021-12-06 23:23:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:15,956 INFO L225 Difference]: With dead ends: 314355 [2021-12-06 23:23:15,956 INFO L226 Difference]: Without dead ends: 166962 [2021-12-06 23:23:16,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:16,014 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 388 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:16,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 330 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:23:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166962 states. [2021-12-06 23:23:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166962 to 164395. [2021-12-06 23:23:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164395 states, 164394 states have (on average 1.0651605289730768) internal successors, (175106), 164394 states have internal predecessors, (175106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164395 states to 164395 states and 175106 transitions. [2021-12-06 23:23:18,160 INFO L78 Accepts]: Start accepts. Automaton has 164395 states and 175106 transitions. Word has length 579 [2021-12-06 23:23:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:18,161 INFO L470 AbstractCegarLoop]: Abstraction has 164395 states and 175106 transitions. [2021-12-06 23:23:18,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 164395 states and 175106 transitions. [2021-12-06 23:23:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-12-06 23:23:18,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:18,172 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:23:18,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:23:18,172 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1826884351, now seen corresponding path program 1 times [2021-12-06 23:23:18,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:18,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686958763] [2021-12-06 23:23:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:18,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-06 23:23:18,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686958763] [2021-12-06 23:23:18,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686958763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:18,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:23:18,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286839565] [2021-12-06 23:23:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:18,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:23:18,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:23:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:23:18,336 INFO L87 Difference]: Start difference. First operand 164395 states and 175106 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:21,580 INFO L93 Difference]: Finished difference Result 341587 states and 363462 transitions. [2021-12-06 23:23:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:23:21,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 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 586 [2021-12-06 23:23:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:21,745 INFO L225 Difference]: With dead ends: 341587 [2021-12-06 23:23:21,745 INFO L226 Difference]: Without dead ends: 177193 [2021-12-06 23:23:21,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:23:21,793 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 870 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:21,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 307 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 23:23:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177193 states. [2021-12-06 23:23:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177193 to 155447. [2021-12-06 23:23:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155447 states, 155446 states have (on average 1.06181567875661) internal successors, (165055), 155446 states have internal predecessors, (165055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155447 states to 155447 states and 165055 transitions. [2021-12-06 23:23:23,698 INFO L78 Accepts]: Start accepts. Automaton has 155447 states and 165055 transitions. Word has length 586 [2021-12-06 23:23:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:23,699 INFO L470 AbstractCegarLoop]: Abstraction has 155447 states and 165055 transitions. [2021-12-06 23:23:23,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 155447 states and 165055 transitions. [2021-12-06 23:23:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2021-12-06 23:23:23,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:23,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:23,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:23:23,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2067300474, now seen corresponding path program 1 times [2021-12-06 23:23:23,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:23,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686588721] [2021-12-06 23:23:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:23,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:23:23,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:23,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686588721] [2021-12-06 23:23:23,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686588721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:23,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081966854] [2021-12-06 23:23:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:23,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:23,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:23,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:23,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:23:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:23:24,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 355 proven. 47 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:23:24,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:23:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081966854] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:25,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:23:25,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-12-06 23:23:25,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589509706] [2021-12-06 23:23:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:25,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:23:25,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:23:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:23:25,195 INFO L87 Difference]: Start difference. First operand 155447 states and 165055 transitions. Second operand has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:28,584 INFO L93 Difference]: Finished difference Result 331332 states and 351965 transitions. [2021-12-06 23:23:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:23:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 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 616 [2021-12-06 23:23:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:28,740 INFO L225 Difference]: With dead ends: 331332 [2021-12-06 23:23:28,740 INFO L226 Difference]: Without dead ends: 175462 [2021-12-06 23:23:28,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1235 GetRequests, 1228 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:23:28,792 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 929 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:28,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 162 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 23:23:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175462 states. [2021-12-06 23:23:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175462 to 170767. [2021-12-06 23:23:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170767 states, 170766 states have (on average 1.0631097525268496) internal successors, (181543), 170766 states have internal predecessors, (181543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170767 states to 170767 states and 181543 transitions. [2021-12-06 23:23:30,733 INFO L78 Accepts]: Start accepts. Automaton has 170767 states and 181543 transitions. Word has length 616 [2021-12-06 23:23:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:30,733 INFO L470 AbstractCegarLoop]: Abstraction has 170767 states and 181543 transitions. [2021-12-06 23:23:30,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 170767 states and 181543 transitions. [2021-12-06 23:23:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2021-12-06 23:23:30,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:30,744 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:30,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 23:23:30,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 23:23:30,947 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1852479384, now seen corresponding path program 1 times [2021-12-06 23:23:30,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:30,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478890906] [2021-12-06 23:23:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:30,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-12-06 23:23:31,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478890906] [2021-12-06 23:23:31,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478890906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:31,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:31,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:23:31,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848678522] [2021-12-06 23:23:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:31,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:23:31,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:23:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:31,152 INFO L87 Difference]: Start difference. First operand 170767 states and 181543 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:32,802 INFO L93 Difference]: Finished difference Result 327035 states and 347490 transitions. [2021-12-06 23:23:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:23:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 625 [2021-12-06 23:23:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:32,949 INFO L225 Difference]: With dead ends: 327035 [2021-12-06 23:23:32,949 INFO L226 Difference]: Without dead ends: 156691 [2021-12-06 23:23:32,997 INFO L932 BasicCegarLoop]: 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 [2021-12-06 23:23:32,998 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 504 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:32,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 83 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:23:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156691 states. [2021-12-06 23:23:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156691 to 156670. [2021-12-06 23:23:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 1.061396957917648) internal successors, (166288), 156669 states have internal predecessors, (166288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 166288 transitions. [2021-12-06 23:23:34,712 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 166288 transitions. Word has length 625 [2021-12-06 23:23:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:34,713 INFO L470 AbstractCegarLoop]: Abstraction has 156670 states and 166288 transitions. [2021-12-06 23:23:34,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 166288 transitions. [2021-12-06 23:23:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2021-12-06 23:23:34,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:34,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:34,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 23:23:34,721 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1571373520, now seen corresponding path program 1 times [2021-12-06 23:23:34,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:34,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420691824] [2021-12-06 23:23:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:34,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 515 proven. 89 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:23:34,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:34,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420691824] [2021-12-06 23:23:34,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420691824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:34,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44608055] [2021-12-06 23:23:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:35,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:35,000 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:35,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:23:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:35,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:23:35,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 393 proven. 47 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:23:35,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:23:35,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44608055] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:35,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:23:35,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-12-06 23:23:35,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944409962] [2021-12-06 23:23:35,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:35,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:23:35,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:23:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:23:35,994 INFO L87 Difference]: Start difference. First operand 156670 states and 166288 transitions. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:39,137 INFO L93 Difference]: Finished difference Result 160087 states and 169799 transitions. [2021-12-06 23:23:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:23:39,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 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 633 [2021-12-06 23:23:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:39,293 INFO L225 Difference]: With dead ends: 160087 [2021-12-06 23:23:39,293 INFO L226 Difference]: Without dead ends: 159660 [2021-12-06 23:23:39,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1269 GetRequests, 1262 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:23:39,323 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 900 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:39,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 136 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 23:23:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159660 states. [2021-12-06 23:23:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159660 to 156670. [2021-12-06 23:23:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 1.0611224939203032) internal successors, (166245), 156669 states have internal predecessors, (166245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 166245 transitions. [2021-12-06 23:23:41,030 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 166245 transitions. Word has length 633 [2021-12-06 23:23:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:41,030 INFO L470 AbstractCegarLoop]: Abstraction has 156670 states and 166245 transitions. [2021-12-06 23:23:41,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 166245 transitions. [2021-12-06 23:23:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2021-12-06 23:23:41,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:41,044 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:23:41,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:23:41,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:41,245 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2133579429, now seen corresponding path program 1 times [2021-12-06 23:23:41,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:41,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102090980] [2021-12-06 23:23:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:41,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 1032 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-12-06 23:23:41,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:41,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102090980] [2021-12-06 23:23:41,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102090980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:41,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:41,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:23:41,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846647313] [2021-12-06 23:23:41,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:41,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:23:41,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:23:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:23:41,465 INFO L87 Difference]: Start difference. First operand 156670 states and 166245 transitions. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:44,883 INFO L93 Difference]: Finished difference Result 329503 states and 349483 transitions. [2021-12-06 23:23:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:23:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 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 725 [2021-12-06 23:23:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:45,174 INFO L225 Difference]: With dead ends: 329503 [2021-12-06 23:23:45,174 INFO L226 Difference]: Without dead ends: 173258 [2021-12-06 23:23:45,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:23:45,216 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 759 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:45,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 324 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 23:23:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173258 states. [2021-12-06 23:23:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173258 to 142221. [2021-12-06 23:23:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142221 states, 142220 states have (on average 1.0549289832653634) internal successors, (150032), 142220 states have internal predecessors, (150032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142221 states to 142221 states and 150032 transitions. [2021-12-06 23:23:46,922 INFO L78 Accepts]: Start accepts. Automaton has 142221 states and 150032 transitions. Word has length 725 [2021-12-06 23:23:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:46,923 INFO L470 AbstractCegarLoop]: Abstraction has 142221 states and 150032 transitions. [2021-12-06 23:23:46,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 142221 states and 150032 transitions. [2021-12-06 23:23:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2021-12-06 23:23:46,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:46,937 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:46,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 23:23:46,937 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash -208063408, now seen corresponding path program 1 times [2021-12-06 23:23:46,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:46,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241396425] [2021-12-06 23:23:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:46,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 601 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-06 23:23:47,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241396425] [2021-12-06 23:23:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241396425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:47,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:23:47,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:23:47,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814998959] [2021-12-06 23:23:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:47,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:23:47,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:23:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:47,126 INFO L87 Difference]: Start difference. First operand 142221 states and 150032 transitions. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:49,419 INFO L93 Difference]: Finished difference Result 295511 states and 311580 transitions. [2021-12-06 23:23:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:23:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 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 731 [2021-12-06 23:23:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:49,573 INFO L225 Difference]: With dead ends: 295511 [2021-12-06 23:23:49,574 INFO L226 Difference]: Without dead ends: 153717 [2021-12-06 23:23:49,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:23:49,619 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 92 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:49,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 708 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:23:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153717 states. [2021-12-06 23:23:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153717 to 145623. [2021-12-06 23:23:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145623 states, 145622 states have (on average 1.0512765928225132) internal successors, (153089), 145622 states have internal predecessors, (153089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145623 states to 145623 states and 153089 transitions. [2021-12-06 23:23:51,321 INFO L78 Accepts]: Start accepts. Automaton has 145623 states and 153089 transitions. Word has length 731 [2021-12-06 23:23:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:51,321 INFO L470 AbstractCegarLoop]: Abstraction has 145623 states and 153089 transitions. [2021-12-06 23:23:51,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 145623 states and 153089 transitions. [2021-12-06 23:23:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 741 [2021-12-06 23:23:51,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:51,341 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:51,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:23:51,341 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1975005108, now seen corresponding path program 1 times [2021-12-06 23:23:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:51,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426778640] [2021-12-06 23:23:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:51,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 474 proven. 78 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-06 23:23:51,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426778640] [2021-12-06 23:23:51,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426778640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:51,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637425274] [2021-12-06 23:23:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:51,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:51,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:51,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:51,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:23:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:23:51,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-06 23:23:57,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:23:57,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637425274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:23:57,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:23:57,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2021-12-06 23:23:57,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325513688] [2021-12-06 23:23:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:23:57,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:23:57,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:23:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:23:57,142 INFO L87 Difference]: Start difference. First operand 145623 states and 153089 transitions. Second operand has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:57,546 INFO L93 Difference]: Finished difference Result 145985 states and 153455 transitions. [2021-12-06 23:23:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:23:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 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 740 [2021-12-06 23:23:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:57,695 INFO L225 Difference]: With dead ends: 145985 [2021-12-06 23:23:57,696 INFO L226 Difference]: Without dead ends: 145983 [2021-12-06 23:23:57,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:23:57,724 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 777 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:57,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 784 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 777 Unchecked, 0.0s Time] [2021-12-06 23:23:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145983 states. [2021-12-06 23:23:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145983 to 145958. [2021-12-06 23:23:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145958 states, 145957 states have (on average 1.0511863082962791) internal successors, (153428), 145957 states have internal predecessors, (153428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145958 states to 145958 states and 153428 transitions. [2021-12-06 23:23:59,309 INFO L78 Accepts]: Start accepts. Automaton has 145958 states and 153428 transitions. Word has length 740 [2021-12-06 23:23:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:59,309 INFO L470 AbstractCegarLoop]: Abstraction has 145958 states and 153428 transitions. [2021-12-06 23:23:59,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 145958 states and 153428 transitions. [2021-12-06 23:23:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2021-12-06 23:23:59,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:59,323 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:59,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:23:59,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:23:59,526 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1945946254, now seen corresponding path program 1 times [2021-12-06 23:23:59,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:59,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813973709] [2021-12-06 23:23:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:59,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 515 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:23:59,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813973709] [2021-12-06 23:23:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813973709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376858692] [2021-12-06 23:23:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:59,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:59,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:59,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:23:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:23:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 514 proven. 47 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:24:00,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:24:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376858692] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:01,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:24:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2021-12-06 23:24:01,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629119296] [2021-12-06 23:24:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:24:01,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:24:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:24:01,221 INFO L87 Difference]: Start difference. First operand 145958 states and 153428 transitions. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:04,966 INFO L93 Difference]: Finished difference Result 148096 states and 155591 transitions. [2021-12-06 23:24:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:24:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 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 754 [2021-12-06 23:24:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:05,102 INFO L225 Difference]: With dead ends: 148096 [2021-12-06 23:24:05,102 INFO L226 Difference]: Without dead ends: 147669 [2021-12-06 23:24:05,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 1504 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:24:05,130 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 773 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:05,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 119 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 23:24:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147669 states. [2021-12-06 23:24:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147669 to 145108. [2021-12-06 23:24:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145108 states, 145107 states have (on average 1.0512449433866045) internal successors, (152543), 145107 states have internal predecessors, (152543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145108 states to 145108 states and 152543 transitions. [2021-12-06 23:24:06,732 INFO L78 Accepts]: Start accepts. Automaton has 145108 states and 152543 transitions. Word has length 754 [2021-12-06 23:24:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 145108 states and 152543 transitions. [2021-12-06 23:24:06,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 145108 states and 152543 transitions. [2021-12-06 23:24:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2021-12-06 23:24:06,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:06,748 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:06,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:24:06,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 23:24:06,950 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1145087842, now seen corresponding path program 1 times [2021-12-06 23:24:06,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111478130] [2021-12-06 23:24:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:06,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 508 proven. 78 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 23:24:07,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:07,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111478130] [2021-12-06 23:24:07,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111478130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:07,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244822300] [2021-12-06 23:24:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:07,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:07,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:07,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:24:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:24:07,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 463 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-06 23:24:08,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:24:08,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244822300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:24:08,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:24:08,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 23:24:08,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057226089] [2021-12-06 23:24:08,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:08,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:24:08,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:24:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:24:08,341 INFO L87 Difference]: Start difference. First operand 145108 states and 152543 transitions. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:11,459 INFO L93 Difference]: Finished difference Result 306024 states and 321660 transitions. [2021-12-06 23:24:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:24:11,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 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 767 [2021-12-06 23:24:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:11,619 INFO L225 Difference]: With dead ends: 306024 [2021-12-06 23:24:11,619 INFO L226 Difference]: Without dead ends: 160918 [2021-12-06 23:24:11,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:24:11,681 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 354 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:11,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 288 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 23:24:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160918 states. [2021-12-06 23:24:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160918 to 155356. [2021-12-06 23:24:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155356 states, 155355 states have (on average 1.0489652730842265) internal successors, (162962), 155355 states have internal predecessors, (162962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155356 states to 155356 states and 162962 transitions. [2021-12-06 23:24:13,464 INFO L78 Accepts]: Start accepts. Automaton has 155356 states and 162962 transitions. Word has length 767 [2021-12-06 23:24:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:13,464 INFO L470 AbstractCegarLoop]: Abstraction has 155356 states and 162962 transitions. [2021-12-06 23:24:13,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 155356 states and 162962 transitions. [2021-12-06 23:24:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2021-12-06 23:24:13,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:13,479 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:13,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:24:13,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 23:24:13,681 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 249043378, now seen corresponding path program 1 times [2021-12-06 23:24:13,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234987569] [2021-12-06 23:24:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:13,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 516 proven. 78 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-06 23:24:13,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234987569] [2021-12-06 23:24:13,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234987569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241916778] [2021-12-06 23:24:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:13,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:13,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:13,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:24:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:14,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:24:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 432 proven. 47 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-06 23:24:20,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-06 23:24:21,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241916778] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:21,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:24:21,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 5] total 10 [2021-12-06 23:24:21,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115597841] [2021-12-06 23:24:21,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:21,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:24:21,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:24:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:24:21,374 INFO L87 Difference]: Start difference. First operand 155356 states and 162962 transitions. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:41,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:24:50,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:24:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:59,298 INFO L93 Difference]: Finished difference Result 211594 states and 222325 transitions. [2021-12-06 23:24:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:24:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 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 775 [2021-12-06 23:24:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:59,512 INFO L225 Difference]: With dead ends: 211594 [2021-12-06 23:24:59,512 INFO L226 Difference]: Without dead ends: 211167 [2021-12-06 23:24:59,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1555 GetRequests, 1545 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:24:59,550 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 2705 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 1007 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2705 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 4491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1007 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:59,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2705 Valid, 150 Invalid, 4491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1007 Valid, 3482 Invalid, 2 Unknown, 0 Unchecked, 36.9s Time] [2021-12-06 23:24:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211167 states. [2021-12-06 23:25:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211167 to 203497. [2021-12-06 23:25:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203497 states, 203496 states have (on average 1.0519961080316076) internal successors, (214077), 203496 states have internal predecessors, (214077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203497 states to 203497 states and 214077 transitions. [2021-12-06 23:25:01,854 INFO L78 Accepts]: Start accepts. Automaton has 203497 states and 214077 transitions. Word has length 775 [2021-12-06 23:25:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:01,855 INFO L470 AbstractCegarLoop]: Abstraction has 203497 states and 214077 transitions. [2021-12-06 23:25:01,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 203497 states and 214077 transitions. [2021-12-06 23:25:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2021-12-06 23:25:01,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:01,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:01,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:25:02,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:25:02,081 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1379689479, now seen corresponding path program 1 times [2021-12-06 23:25:02,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:02,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243170263] [2021-12-06 23:25:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:02,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 23:25:02,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243170263] [2021-12-06 23:25:02,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243170263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:02,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:02,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:25:02,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065562696] [2021-12-06 23:25:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:02,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:02,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:02,338 INFO L87 Difference]: Start difference. First operand 203497 states and 214077 transitions. Second operand has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:06,227 INFO L93 Difference]: Finished difference Result 469210 states and 493214 transitions. [2021-12-06 23:25:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 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 795 [2021-12-06 23:25:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:06,680 INFO L225 Difference]: With dead ends: 469210 [2021-12-06 23:25:06,681 INFO L226 Difference]: Without dead ends: 265715 [2021-12-06 23:25:06,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:06,739 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 894 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:06,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 176 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 23:25:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265715 states. [2021-12-06 23:25:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265715 to 255485. [2021-12-06 23:25:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255485 states, 255484 states have (on average 1.0516627264329665) internal successors, (268683), 255484 states have internal predecessors, (268683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255485 states to 255485 states and 268683 transitions. [2021-12-06 23:25:09,633 INFO L78 Accepts]: Start accepts. Automaton has 255485 states and 268683 transitions. Word has length 795 [2021-12-06 23:25:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:09,633 INFO L470 AbstractCegarLoop]: Abstraction has 255485 states and 268683 transitions. [2021-12-06 23:25:09,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 255485 states and 268683 transitions. [2021-12-06 23:25:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2021-12-06 23:25:09,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:09,655 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:09,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 23:25:09,655 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 186103580, now seen corresponding path program 1 times [2021-12-06 23:25:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:09,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936441679] [2021-12-06 23:25:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:09,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-12-06 23:25:09,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936441679] [2021-12-06 23:25:09,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936441679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:09,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:09,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:25:09,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636806502] [2021-12-06 23:25:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:09,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:09,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:09,863 INFO L87 Difference]: Start difference. First operand 255485 states and 268683 transitions. Second operand has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:14,208 INFO L93 Difference]: Finished difference Result 571057 states and 600174 transitions. [2021-12-06 23:25:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 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 798 [2021-12-06 23:25:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:14,538 INFO L225 Difference]: With dead ends: 571057 [2021-12-06 23:25:14,538 INFO L226 Difference]: Without dead ends: 315574 [2021-12-06 23:25:14,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:14,634 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 894 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:14,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 176 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 23:25:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315574 states. [2021-12-06 23:25:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315574 to 255910. [2021-12-06 23:25:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255910 states, 255909 states have (on average 1.0515925582922054) internal successors, (269112), 255909 states have internal predecessors, (269112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255910 states to 255910 states and 269112 transitions. [2021-12-06 23:25:18,009 INFO L78 Accepts]: Start accepts. Automaton has 255910 states and 269112 transitions. Word has length 798 [2021-12-06 23:25:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:18,010 INFO L470 AbstractCegarLoop]: Abstraction has 255910 states and 269112 transitions. [2021-12-06 23:25:18,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 255910 states and 269112 transitions. [2021-12-06 23:25:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2021-12-06 23:25:18,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:18,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:25:18,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 23:25:18,034 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1052632507, now seen corresponding path program 1 times [2021-12-06 23:25:18,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523709260] [2021-12-06 23:25:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:18,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 557 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:18,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523709260] [2021-12-06 23:25:18,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523709260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263888532] [2021-12-06 23:25:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:18,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:18,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:18,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:25:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:25:18,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-06 23:25:19,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:19,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263888532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:19,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:25:19,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-06 23:25:19,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998529903] [2021-12-06 23:25:19,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:19,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:19,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:19,795 INFO L87 Difference]: Start difference. First operand 255910 states and 269112 transitions. Second operand has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:20,618 INFO L93 Difference]: Finished difference Result 256659 states and 269865 transitions. [2021-12-06 23:25:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 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 847 [2021-12-06 23:25:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:20,859 INFO L225 Difference]: With dead ends: 256659 [2021-12-06 23:25:20,859 INFO L226 Difference]: Without dead ends: 256657 [2021-12-06 23:25:20,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:20,891 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:20,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 829 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 704 Unchecked, 0.0s Time] [2021-12-06 23:25:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256657 states. [2021-12-06 23:25:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256657 to 256182. [2021-12-06 23:25:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256182 states, 256181 states have (on average 1.0515533938894766) internal successors, (269388), 256181 states have internal predecessors, (269388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256182 states to 256182 states and 269388 transitions. [2021-12-06 23:25:23,834 INFO L78 Accepts]: Start accepts. Automaton has 256182 states and 269388 transitions. Word has length 847 [2021-12-06 23:25:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:23,834 INFO L470 AbstractCegarLoop]: Abstraction has 256182 states and 269388 transitions. [2021-12-06 23:25:23,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 256182 states and 269388 transitions. [2021-12-06 23:25:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2021-12-06 23:25:23,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:23,873 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:25:23,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:25:24,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 23:25:24,075 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1549409980, now seen corresponding path program 1 times [2021-12-06 23:25:24,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:24,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575216017] [2021-12-06 23:25:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:24,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-06 23:25:24,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575216017] [2021-12-06 23:25:24,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575216017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:24,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:24,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:24,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003462107] [2021-12-06 23:25:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:24,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:24,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:24,506 INFO L87 Difference]: Start difference. First operand 256182 states and 269388 transitions. Second operand has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:27,353 INFO L93 Difference]: Finished difference Result 495748 states and 521602 transitions. [2021-12-06 23:25:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 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 909 [2021-12-06 23:25:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:27,614 INFO L225 Difference]: With dead ends: 495748 [2021-12-06 23:25:27,614 INFO L226 Difference]: Without dead ends: 239993 [2021-12-06 23:25:27,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:27,713 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 472 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:27,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 212 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:25:28,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239993 states. [2021-12-06 23:25:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239993 to 210571. [2021-12-06 23:25:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210571 states, 210570 states have (on average 1.0474284086052144) internal successors, (220557), 210570 states have internal predecessors, (220557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210571 states to 210571 states and 220557 transitions. [2021-12-06 23:25:30,498 INFO L78 Accepts]: Start accepts. Automaton has 210571 states and 220557 transitions. Word has length 909 [2021-12-06 23:25:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:30,499 INFO L470 AbstractCegarLoop]: Abstraction has 210571 states and 220557 transitions. [2021-12-06 23:25:30,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 210571 states and 220557 transitions. [2021-12-06 23:25:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2021-12-06 23:25:30,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:30,528 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:30,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 23:25:30,528 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -908120223, now seen corresponding path program 1 times [2021-12-06 23:25:30,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:30,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156841194] [2021-12-06 23:25:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:30,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 811 proven. 67 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-06 23:25:30,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:30,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156841194] [2021-12-06 23:25:30,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156841194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:30,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224369434] [2021-12-06 23:25:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:30,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:30,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:30,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:25:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:30,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:25:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 717 proven. 245 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 23:25:34,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 881 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-06 23:25:35,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224369434] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:35,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:35,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-12-06 23:25:35,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366151514] [2021-12-06 23:25:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:35,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:35,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:35,536 INFO L87 Difference]: Start difference. First operand 210571 states and 220557 transitions. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:38,197 INFO L93 Difference]: Finished difference Result 424126 states and 444054 transitions. [2021-12-06 23:25:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 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 915 [2021-12-06 23:25:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:38,433 INFO L225 Difference]: With dead ends: 424126 [2021-12-06 23:25:38,433 INFO L226 Difference]: Without dead ends: 213982 [2021-12-06 23:25:38,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1832 GetRequests, 1826 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:38,501 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 263 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:38,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 198 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:25:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213982 states. [2021-12-06 23:25:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213982 to 210117. [2021-12-06 23:25:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210117 states, 210116 states have (on average 1.0440851720002284) internal successors, (219379), 210116 states have internal predecessors, (219379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210117 states to 210117 states and 219379 transitions. [2021-12-06 23:25:40,999 INFO L78 Accepts]: Start accepts. Automaton has 210117 states and 219379 transitions. Word has length 915 [2021-12-06 23:25:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:41,000 INFO L470 AbstractCegarLoop]: Abstraction has 210117 states and 219379 transitions. [2021-12-06 23:25:41,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 210117 states and 219379 transitions. [2021-12-06 23:25:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2021-12-06 23:25:41,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:41,035 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:41,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:25:41,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 23:25:41,237 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1099846593, now seen corresponding path program 1 times [2021-12-06 23:25:41,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:41,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322716869] [2021-12-06 23:25:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:41,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 865 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-06 23:25:41,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322716869] [2021-12-06 23:25:41,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322716869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:41,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:41,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:41,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113374576] [2021-12-06 23:25:41,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:41,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:41,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:41,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:41,649 INFO L87 Difference]: Start difference. First operand 210117 states and 219379 transitions. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:44,123 INFO L93 Difference]: Finished difference Result 416827 states and 435062 transitions. [2021-12-06 23:25:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 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 942 [2021-12-06 23:25:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:44,351 INFO L225 Difference]: With dead ends: 416827 [2021-12-06 23:25:44,351 INFO L226 Difference]: Without dead ends: 207137 [2021-12-06 23:25:44,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:44,420 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 486 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:44,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 632 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:25:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207137 states. [2021-12-06 23:25:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207137 to 205854. [2021-12-06 23:25:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205854 states, 205853 states have (on average 1.0415004882124623) internal successors, (214396), 205853 states have internal predecessors, (214396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205854 states to 205854 states and 214396 transitions. [2021-12-06 23:25:47,121 INFO L78 Accepts]: Start accepts. Automaton has 205854 states and 214396 transitions. Word has length 942 [2021-12-06 23:25:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:47,122 INFO L470 AbstractCegarLoop]: Abstraction has 205854 states and 214396 transitions. [2021-12-06 23:25:47,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 205854 states and 214396 transitions. [2021-12-06 23:25:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2021-12-06 23:25:47,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:47,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:25:47,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 23:25:47,150 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1775532782, now seen corresponding path program 1 times [2021-12-06 23:25:47,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:47,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599221000] [2021-12-06 23:25:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:47,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 1150 proven. 107 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-06 23:25:47,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599221000] [2021-12-06 23:25:47,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599221000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88698922] [2021-12-06 23:25:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:47,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:47,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:47,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:25:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:47,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:25:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 1007 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-06 23:25:48,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:48,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88698922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:48,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:25:48,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 23:25:48,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680112894] [2021-12-06 23:25:48,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:48,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:48,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:48,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:48,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:48,413 INFO L87 Difference]: Start difference. First operand 205854 states and 214396 transitions. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:50,660 INFO L93 Difference]: Finished difference Result 411281 states and 428363 transitions. [2021-12-06 23:25:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:50,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 954 [2021-12-06 23:25:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:50,866 INFO L225 Difference]: With dead ends: 411281 [2021-12-06 23:25:50,866 INFO L226 Difference]: Without dead ends: 205854 [2021-12-06 23:25:50,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:50,924 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 130 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:50,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 754 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 23:25:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205854 states. [2021-12-06 23:25:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205854 to 205854. [2021-12-06 23:25:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205854 states, 205853 states have (on average 1.0414810568706796) internal successors, (214392), 205853 states have internal predecessors, (214392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205854 states to 205854 states and 214392 transitions. [2021-12-06 23:25:53,365 INFO L78 Accepts]: Start accepts. Automaton has 205854 states and 214392 transitions. Word has length 954 [2021-12-06 23:25:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:53,366 INFO L470 AbstractCegarLoop]: Abstraction has 205854 states and 214392 transitions. [2021-12-06 23:25:53,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 205854 states and 214392 transitions. [2021-12-06 23:25:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2021-12-06 23:25:53,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:53,520 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:53,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 23:25:53,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 23:25:53,722 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2040091142, now seen corresponding path program 1 times [2021-12-06 23:25:53,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249731161] [2021-12-06 23:25:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:53,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 1147 proven. 0 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2021-12-06 23:25:54,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:54,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249731161] [2021-12-06 23:25:54,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249731161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:54,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269616835] [2021-12-06 23:25:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:54,030 INFO L87 Difference]: Start difference. First operand 205854 states and 214392 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:56,984 INFO L93 Difference]: Finished difference Result 409996 states and 427035 transitions. [2021-12-06 23:25:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 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 973 [2021-12-06 23:25:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:57,210 INFO L225 Difference]: With dead ends: 409996 [2021-12-06 23:25:57,210 INFO L226 Difference]: Without dead ends: 204569 [2021-12-06 23:25:57,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:57,283 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 190 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:57,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 211 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 23:25:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204569 states. [2021-12-06 23:25:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204569 to 196913. [2021-12-06 23:25:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196913 states, 196912 states have (on average 1.0401346794507191) internal successors, (204815), 196912 states have internal predecessors, (204815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196913 states to 196913 states and 204815 transitions. [2021-12-06 23:25:59,900 INFO L78 Accepts]: Start accepts. Automaton has 196913 states and 204815 transitions. Word has length 973 [2021-12-06 23:25:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:59,901 INFO L470 AbstractCegarLoop]: Abstraction has 196913 states and 204815 transitions. [2021-12-06 23:25:59,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 196913 states and 204815 transitions. [2021-12-06 23:25:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2021-12-06 23:25:59,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:59,929 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:25:59,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 23:25:59,929 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:59,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1554620150, now seen corresponding path program 1 times [2021-12-06 23:25:59,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:59,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890361921] [2021-12-06 23:25:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:59,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 785 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-06 23:26:00,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:00,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890361921] [2021-12-06 23:26:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890361921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:00,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:00,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:26:00,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240996459] [2021-12-06 23:26:00,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:00,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:00,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:00,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:00,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:00,214 INFO L87 Difference]: Start difference. First operand 196913 states and 204815 transitions. Second operand has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:02,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:02,559 INFO L93 Difference]: Finished difference Result 390830 states and 406390 transitions. [2021-12-06 23:26:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:02,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 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 983 [2021-12-06 23:26:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:02,740 INFO L225 Difference]: With dead ends: 390830 [2021-12-06 23:26:02,741 INFO L226 Difference]: Without dead ends: 194344 [2021-12-06 23:26:02,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:02,810 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:02,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 742 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:26:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194344 states. [2021-12-06 23:26:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194344 to 190093. [2021-12-06 23:26:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190093 states, 190092 states have (on average 1.039643961871094) internal successors, (197628), 190092 states have internal predecessors, (197628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190093 states to 190093 states and 197628 transitions. [2021-12-06 23:26:05,251 INFO L78 Accepts]: Start accepts. Automaton has 190093 states and 197628 transitions. Word has length 983 [2021-12-06 23:26:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:05,252 INFO L470 AbstractCegarLoop]: Abstraction has 190093 states and 197628 transitions. [2021-12-06 23:26:05,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 190093 states and 197628 transitions. [2021-12-06 23:26:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2021-12-06 23:26:05,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:05,283 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:26:05,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 23:26:05,283 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1415022793, now seen corresponding path program 1 times [2021-12-06 23:26:05,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:05,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128864252] [2021-12-06 23:26:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:05,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 682 proven. 78 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 23:26:05,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128864252] [2021-12-06 23:26:05,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128864252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706570627] [2021-12-06 23:26:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:05,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:05,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:05,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:05,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:26:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:26:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 796 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-06 23:26:09,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:26:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706570627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:09,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:26:09,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 23:26:09,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560468523] [2021-12-06 23:26:09,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:09,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:09,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:09,653 INFO L87 Difference]: Start difference. First operand 190093 states and 197628 transitions. Second operand has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:12,545 INFO L93 Difference]: Finished difference Result 386154 states and 401402 transitions. [2021-12-06 23:26:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 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 994 [2021-12-06 23:26:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:12,723 INFO L225 Difference]: With dead ends: 386154 [2021-12-06 23:26:12,723 INFO L226 Difference]: Without dead ends: 196488 [2021-12-06 23:26:12,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:12,781 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:12,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 743 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 23:26:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196488 states. [2021-12-06 23:26:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196488 to 190943. [2021-12-06 23:26:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190943 states, 190942 states have (on average 1.0389332886426244) internal successors, (198376), 190942 states have internal predecessors, (198376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190943 states to 190943 states and 198376 transitions. [2021-12-06 23:26:15,024 INFO L78 Accepts]: Start accepts. Automaton has 190943 states and 198376 transitions. Word has length 994 [2021-12-06 23:26:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:15,025 INFO L470 AbstractCegarLoop]: Abstraction has 190943 states and 198376 transitions. [2021-12-06 23:26:15,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 190943 states and 198376 transitions. [2021-12-06 23:26:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2021-12-06 23:26:15,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:15,056 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:15,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:26:15,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:15,259 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 848978045, now seen corresponding path program 1 times [2021-12-06 23:26:15,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:15,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67976022] [2021-12-06 23:26:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:15,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 880 proven. 125 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-06 23:26:15,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67976022] [2021-12-06 23:26:15,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67976022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184389315] [2021-12-06 23:26:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:15,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:15,559 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:15,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:26:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:26:15,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2021-12-06 23:26:16,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:26:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184389315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:16,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:26:16,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 23:26:16,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105628011] [2021-12-06 23:26:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:16,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:16,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:16,432 INFO L87 Difference]: Start difference. First operand 190943 states and 198376 transitions. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:18,896 INFO L93 Difference]: Finished difference Result 387421 states and 402468 transitions. [2021-12-06 23:26:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 1023 [2021-12-06 23:26:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:19,099 INFO L225 Difference]: With dead ends: 387421 [2021-12-06 23:26:19,099 INFO L226 Difference]: Without dead ends: 196905 [2021-12-06 23:26:19,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1022 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:19,169 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 355 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:19,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 737 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:26:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196905 states. [2021-12-06 23:26:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196905 to 196043. [2021-12-06 23:26:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196043 states, 196042 states have (on average 1.037869436141235) internal successors, (203466), 196042 states have internal predecessors, (203466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196043 states to 196043 states and 203466 transitions. [2021-12-06 23:26:21,478 INFO L78 Accepts]: Start accepts. Automaton has 196043 states and 203466 transitions. Word has length 1023 [2021-12-06 23:26:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:21,478 INFO L470 AbstractCegarLoop]: Abstraction has 196043 states and 203466 transitions. [2021-12-06 23:26:21,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 196043 states and 203466 transitions. [2021-12-06 23:26:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2021-12-06 23:26:21,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:21,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:21,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 23:26:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 23:26:21,714 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1822852237, now seen corresponding path program 1 times [2021-12-06 23:26:21,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:21,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078424186] [2021-12-06 23:26:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:21,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 914 proven. 125 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2021-12-06 23:26:22,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078424186] [2021-12-06 23:26:22,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078424186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819164965] [2021-12-06 23:26:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:22,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:22,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:22,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:26:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:22,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:26:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 1019 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-12-06 23:26:30,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:26:30,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819164965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:30,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:26:30,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2021-12-06 23:26:30,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970258458] [2021-12-06 23:26:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:30,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:26:30,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:26:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:26:30,249 INFO L87 Difference]: Start difference. First operand 196043 states and 203466 transitions. Second operand has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:32,938 INFO L93 Difference]: Finished difference Result 404454 states and 419571 transitions. [2021-12-06 23:26:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:26:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 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 1040 [2021-12-06 23:26:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:33,167 INFO L225 Difference]: With dead ends: 404454 [2021-12-06 23:26:33,167 INFO L226 Difference]: Without dead ends: 207988 [2021-12-06 23:26:33,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:26:33,244 INFO L933 BasicCegarLoop]: 689 mSDtfsCounter, 1059 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 4334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3113 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:33,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 815 Invalid, 4334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1090 Invalid, 0 Unknown, 3113 Unchecked, 1.6s Time] [2021-12-06 23:26:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207988 states. [2021-12-06 23:26:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207988 to 161399. [2021-12-06 23:26:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161399 states, 161398 states have (on average 1.0375283460761595) internal successors, (167455), 161398 states have internal predecessors, (167455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161399 states to 161399 states and 167455 transitions. [2021-12-06 23:26:35,391 INFO L78 Accepts]: Start accepts. Automaton has 161399 states and 167455 transitions. Word has length 1040 [2021-12-06 23:26:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:35,392 INFO L470 AbstractCegarLoop]: Abstraction has 161399 states and 167455 transitions. [2021-12-06 23:26:35,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 161399 states and 167455 transitions. [2021-12-06 23:26:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2021-12-06 23:26:35,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:35,429 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:26:35,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:26:35,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:35,631 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash -235419340, now seen corresponding path program 1 times [2021-12-06 23:26:35,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949776744] [2021-12-06 23:26:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:35,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 961 proven. 125 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-06 23:26:35,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949776744] [2021-12-06 23:26:35,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949776744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079045329] [2021-12-06 23:26:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:35,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:35,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:35,959 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:35,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:26:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:26:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-06 23:26:46,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:26:46,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079045329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:46,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:26:46,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2021-12-06 23:26:46,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893790590] [2021-12-06 23:26:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:46,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:26:46,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:26:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:26:46,067 INFO L87 Difference]: Start difference. First operand 161399 states and 167455 transitions. Second operand has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:48,083 INFO L93 Difference]: Finished difference Result 164262 states and 170425 transitions. [2021-12-06 23:26:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:26:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 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 1104 [2021-12-06 23:26:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:48,230 INFO L225 Difference]: With dead ends: 164262 [2021-12-06 23:26:48,230 INFO L226 Difference]: Without dead ends: 164260 [2021-12-06 23:26:48,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:26:48,259 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 443 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1700 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:48,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 825 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1090 Invalid, 0 Unknown, 1700 Unchecked, 1.5s Time] [2021-12-06 23:26:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164260 states. [2021-12-06 23:26:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164260 to 161956. [2021-12-06 23:26:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161956 states, 161955 states have (on average 1.0378623691766231) internal successors, (168087), 161955 states have internal predecessors, (168087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161956 states to 161956 states and 168087 transitions. [2021-12-06 23:26:50,034 INFO L78 Accepts]: Start accepts. Automaton has 161956 states and 168087 transitions. Word has length 1104 [2021-12-06 23:26:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:50,034 INFO L470 AbstractCegarLoop]: Abstraction has 161956 states and 168087 transitions. [2021-12-06 23:26:50,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 161956 states and 168087 transitions. [2021-12-06 23:26:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2021-12-06 23:26:50,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:50,069 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:26:50,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 23:26:50,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 23:26:50,272 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash -78743287, now seen corresponding path program 1 times [2021-12-06 23:26:50,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:50,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439696782] [2021-12-06 23:26:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:50,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 1000 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:50,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:50,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439696782] [2021-12-06 23:26:50,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439696782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:50,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441863726] [2021-12-06 23:26:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:50,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:50,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:50,648 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:50,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:26:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:50,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:26:50,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 913 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-06 23:27:32,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:32,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441863726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:32,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:32,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-12-06 23:27:32,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917382761] [2021-12-06 23:27:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:32,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:32,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:27:32,737 INFO L87 Difference]: Start difference. First operand 161956 states and 168087 transitions. Second operand has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:34,911 INFO L93 Difference]: Finished difference Result 194371 states and 201318 transitions. [2021-12-06 23:27:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:27:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 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 1110 [2021-12-06 23:27:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:35,081 INFO L225 Difference]: With dead ends: 194371 [2021-12-06 23:27:35,081 INFO L226 Difference]: Without dead ends: 193944 [2021-12-06 23:27:35,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:27:35,116 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1038 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4081 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:35,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 255 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1092 Invalid, 0 Unknown, 4081 Unchecked, 1.5s Time] [2021-12-06 23:27:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193944 states. [2021-12-06 23:27:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193944 to 162381. [2021-12-06 23:27:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162381 states, 162380 states have (on average 1.0380896662150512) internal successors, (168565), 162380 states have internal predecessors, (168565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162381 states to 162381 states and 168565 transitions. [2021-12-06 23:27:37,072 INFO L78 Accepts]: Start accepts. Automaton has 162381 states and 168565 transitions. Word has length 1110 [2021-12-06 23:27:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 162381 states and 168565 transitions. [2021-12-06 23:27:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 162381 states and 168565 transitions. [2021-12-06 23:27:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1146 [2021-12-06 23:27:37,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:37,118 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:37,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 23:27:37,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 23:27:37,319 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash -778081610, now seen corresponding path program 1 times [2021-12-06 23:27:37,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:37,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707845620] [2021-12-06 23:27:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:37,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 1123 proven. 125 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-12-06 23:27:37,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:37,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707845620] [2021-12-06 23:27:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707845620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279383286] [2021-12-06 23:27:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:37,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:37,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:37,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:27:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:27:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 1097 proven. 0 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-12-06 23:27:39,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:39,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279383286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:39,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:39,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 23:27:39,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428571718] [2021-12-06 23:27:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:39,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:27:39,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:27:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:27:39,375 INFO L87 Difference]: Start difference. First operand 162381 states and 168565 transitions. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:41,651 INFO L93 Difference]: Finished difference Result 326893 states and 339355 transitions. [2021-12-06 23:27:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:27:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 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 1145 [2021-12-06 23:27:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:41,822 INFO L225 Difference]: With dead ends: 326893 [2021-12-06 23:27:41,822 INFO L226 Difference]: Without dead ends: 164939 [2021-12-06 23:27:41,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:27:41,890 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 323 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:41,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 731 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:27:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164939 states. [2021-12-06 23:27:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164939 to 164939. [2021-12-06 23:27:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164939 states, 164938 states have (on average 1.0374079957317295) internal successors, (171108), 164938 states have internal predecessors, (171108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164939 states to 164939 states and 171108 transitions. [2021-12-06 23:27:43,851 INFO L78 Accepts]: Start accepts. Automaton has 164939 states and 171108 transitions. Word has length 1145 [2021-12-06 23:27:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:43,852 INFO L470 AbstractCegarLoop]: Abstraction has 164939 states and 171108 transitions. [2021-12-06 23:27:43,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 164939 states and 171108 transitions. [2021-12-06 23:27:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1163 [2021-12-06 23:27:43,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:43,899 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:43,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:27:44,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 23:27:44,101 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1205310637, now seen corresponding path program 1 times [2021-12-06 23:27:44,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521246832] [2021-12-06 23:27:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:44,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2090 backedges. 1140 proven. 125 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-12-06 23:27:44,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:44,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521246832] [2021-12-06 23:27:44,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521246832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:44,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892491395] [2021-12-06 23:27:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:44,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:44,446 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:44,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:27:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:27:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2090 backedges. 1097 proven. 0 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2021-12-06 23:27:46,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892491395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:46,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:46,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 23:27:46,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381734594] [2021-12-06 23:27:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:46,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:27:46,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:27:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:27:46,296 INFO L87 Difference]: Start difference. First operand 164939 states and 171108 transitions. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:47,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:47,213 INFO L93 Difference]: Finished difference Result 330186 states and 342532 transitions. [2021-12-06 23:27:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:27:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 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 1162 [2021-12-06 23:27:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:47,365 INFO L225 Difference]: With dead ends: 330186 [2021-12-06 23:27:47,366 INFO L226 Difference]: Without dead ends: 165674 [2021-12-06 23:27:47,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1164 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:27:47,414 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 753 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:47,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 730 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 753 Unchecked, 0.0s Time] [2021-12-06 23:27:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165674 states. [2021-12-06 23:27:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165674 to 165674. [2021-12-06 23:27:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165674 states, 165673 states have (on average 1.037260144984397) internal successors, (171846), 165673 states have internal predecessors, (171846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165674 states to 165674 states and 171846 transitions. [2021-12-06 23:27:49,259 INFO L78 Accepts]: Start accepts. Automaton has 165674 states and 171846 transitions. Word has length 1162 [2021-12-06 23:27:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:49,260 INFO L470 AbstractCegarLoop]: Abstraction has 165674 states and 171846 transitions. [2021-12-06 23:27:49,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 165674 states and 171846 transitions. [2021-12-06 23:27:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2021-12-06 23:27:49,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:49,307 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:27:49,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 23:27:49,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 23:27:49,509 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash 286027421, now seen corresponding path program 1 times [2021-12-06 23:27:49,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:49,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064709569] [2021-12-06 23:27:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:49,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 946 proven. 78 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-12-06 23:27:50,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064709569] [2021-12-06 23:27:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064709569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099313241] [2021-12-06 23:27:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:50,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:50,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:50,025 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:50,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:27:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 946 proven. 78 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-12-06 23:27:52,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1024 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-12-06 23:27:53,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099313241] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:53,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:27:53,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2021-12-06 23:27:53,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110368133] [2021-12-06 23:27:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:27:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:27:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:27:53,308 INFO L87 Difference]: Start difference. First operand 165674 states and 171846 transitions. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:57,438 INFO L93 Difference]: Finished difference Result 353808 states and 367132 transitions. [2021-12-06 23:27:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:27:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 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 1180 [2021-12-06 23:27:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:57,611 INFO L225 Difference]: With dead ends: 353808 [2021-12-06 23:27:57,611 INFO L226 Difference]: Without dead ends: 188561 [2021-12-06 23:27:57,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2361 GetRequests, 2355 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:27:57,667 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 518 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:57,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 111 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 23:27:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188561 states. [2021-12-06 23:27:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188561 to 182184. [2021-12-06 23:27:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182184 states, 182183 states have (on average 1.0383954595104923) internal successors, (189178), 182183 states have internal predecessors, (189178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182184 states to 182184 states and 189178 transitions. [2021-12-06 23:27:59,912 INFO L78 Accepts]: Start accepts. Automaton has 182184 states and 189178 transitions. Word has length 1180 [2021-12-06 23:27:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:59,912 INFO L470 AbstractCegarLoop]: Abstraction has 182184 states and 189178 transitions. [2021-12-06 23:27:59,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 182184 states and 189178 transitions. [2021-12-06 23:27:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2021-12-06 23:27:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:59,957 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:59,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 23:28:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 23:28:00,159 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash -624935841, now seen corresponding path program 1 times [2021-12-06 23:28:00,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:00,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162941930] [2021-12-06 23:28:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:00,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2345 backedges. 1781 proven. 201 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-12-06 23:28:00,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162941930] [2021-12-06 23:28:00,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162941930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696885034] [2021-12-06 23:28:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:00,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:00,550 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:00,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 23:28:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:28:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2345 backedges. 1788 proven. 0 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2021-12-06 23:28:01,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:28:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696885034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:28:01,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:28:01,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-06 23:28:01,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896964167] [2021-12-06 23:28:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:28:01,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:28:01,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:28:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:28:01,697 INFO L87 Difference]: Start difference. First operand 182184 states and 189178 transitions. Second operand has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:05,527 INFO L93 Difference]: Finished difference Result 429566 states and 446294 transitions. [2021-12-06 23:28:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:28:05,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 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 1184 [2021-12-06 23:28:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:05,768 INFO L225 Difference]: With dead ends: 429566 [2021-12-06 23:28:05,768 INFO L226 Difference]: Without dead ends: 247809 [2021-12-06 23:28:05,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1183 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:28:05,828 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 362 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:05,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 138 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 23:28:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247809 states. [2021-12-06 23:28:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247809 to 223731. [2021-12-06 23:28:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223731 states, 223730 states have (on average 1.0373932865507531) internal successors, (232096), 223730 states have internal predecessors, (232096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223731 states to 223731 states and 232096 transitions. [2021-12-06 23:28:08,635 INFO L78 Accepts]: Start accepts. Automaton has 223731 states and 232096 transitions. Word has length 1184 [2021-12-06 23:28:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:08,636 INFO L470 AbstractCegarLoop]: Abstraction has 223731 states and 232096 transitions. [2021-12-06 23:28:08,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 223731 states and 232096 transitions. [2021-12-06 23:28:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2021-12-06 23:28:08,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:08,686 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:08,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 23:28:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:08,888 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1097582283, now seen corresponding path program 1 times [2021-12-06 23:28:08,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74149090] [2021-12-06 23:28:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:08,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1706 proven. 0 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2021-12-06 23:28:09,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:09,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74149090] [2021-12-06 23:28:09,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74149090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:28:09,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:28:09,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:28:09,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285930499] [2021-12-06 23:28:09,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:28:09,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:28:09,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:28:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:28:09,444 INFO L87 Difference]: Start difference. First operand 223731 states and 232096 transitions. Second operand has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:12,980 INFO L93 Difference]: Finished difference Result 441075 states and 457571 transitions. [2021-12-06 23:28:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:28:12,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 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 1189 [2021-12-06 23:28:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:13,207 INFO L225 Difference]: With dead ends: 441075 [2021-12-06 23:28:13,207 INFO L226 Difference]: Without dead ends: 217771 [2021-12-06 23:28:13,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:28:13,399 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 1043 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:13,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 699 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2884 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 23:28:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217771 states. [2021-12-06 23:28:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217771 to 208367. [2021-12-06 23:28:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208367 states, 208366 states have (on average 1.0351352907864046) internal successors, (215687), 208366 states have internal predecessors, (215687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208367 states to 208367 states and 215687 transitions. [2021-12-06 23:28:15,926 INFO L78 Accepts]: Start accepts. Automaton has 208367 states and 215687 transitions. Word has length 1189 [2021-12-06 23:28:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:15,927 INFO L470 AbstractCegarLoop]: Abstraction has 208367 states and 215687 transitions. [2021-12-06 23:28:15,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 208367 states and 215687 transitions. [2021-12-06 23:28:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2021-12-06 23:28:16,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:16,105 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:16,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-06 23:28:16,105 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1934833513, now seen corresponding path program 1 times [2021-12-06 23:28:16,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:16,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790185928] [2021-12-06 23:28:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:16,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 1711 proven. 134 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-12-06 23:28:16,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:16,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790185928] [2021-12-06 23:28:16,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790185928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:16,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262215547] [2021-12-06 23:28:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:16,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:16,464 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:16,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e7b4432-c7d7-4725-81d4-0cd6ffb062d9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 23:28:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:28:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 1313 proven. 67 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-12-06 23:28:18,908 INFO L328 TraceCheckSpWp]: Computing backward predicates...